How to read this page

Every platform below gets its own section with a table per ad format. Lengths are listed in seconds; file-size caps in MB (4096 MB = 4 GB, 131072 MB = 128 GB). Aspect ratios are listed in the order the platform's own docs prefer — 9:16 first when vertical is the primary placement, 1.91:1 first when desktop-link-preview is the primary placement.

Character limits cover the three text fields almost every surface exposes: a primary text / body field, a headline / title, and (when applicable) a CTA button override. Where a platform's CTA is a fixed-list dropdown (Snapchat, Pinterest, most of Meta) the CTA char column reads 0 — you pick from a list rather than type your own.

Citations sit at the bottom of each platform section. When a spec changed recently (TikTok's July 2025 length-cap bump, Meta's March 2026 safe-zone unification, Threads ads going global January 2026), the section's notes call out the date so you know how fresh the number is.

TikTok

Auction (In-Feed, Spark) and Reservation (TopView, Branded) sit on the same 9:16 canvas; Spark Ads inherit organic post specs and have no duration cap.

July 2025 update: Non-Spark In-Feed Ads now support up to 10 minutes (was 60 seconds). Commercial-content disclosure became mandatory for all promotional posts on September 1, 2025.

In-Feed Ad (Auction)

Aspect ratios	9:16, 1:1, 16:9
Resolution	1080×1920 px (9:16 native)
Length	5s – 10 min (600s)
Max file size	500 MB
File formats	MP4, MOV, MPEG, AVI, GIF
Captioning	On-screen text strongly recommended; ~85% of TikTok feed viewers watch muted.
Safe zone	Top ~130 px reserved for status bar; bottom ~482 px houses caption, username, and right-rail action stack (like, comment, share, save).
Audio rules	Must use TikTok Commercial Music Library or upload self-licensed audio. Trending UGC sounds from the consumer library are NOT licensed for paid placements.
Headline	100 chars max
Body / primary text	100 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Toggle TikTok's Commercial Content Disclosure on; AIGC label required if AI-generated voice, face, or core performance is used. FTC #ad in caption as belt-and-suspenders.

Spark Ad

Aspect ratios	9:16, 1:1, 16:9
Resolution	Inherits source post; 1080×1920 preferred
Length	1s – 10 min (600s)
Max file size	500 MB
File formats	MP4, MOV, MPEG, AVI, GIF
Captioning	Inherits the organic post; caption can be edited (≤100 chars, emoji + hashtag allowed) or left blank.
Safe zone	Same 9:16 safe zone as In-Feed; expect the creator handle + organic caption layer to compress the right rail further.
Audio rules	Sparked post must use a commercial-cleared track. If the organic uses a UGC-library sound, it must be replaced before Sparking.
Headline	100 chars max
Body / primary text	100 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Paid Partnership toggle in the original post, plus TikTok's Branded Content disclosure. The creator's own FTC #ad obligations carry over.

TopView

Aspect ratios	9:16
Resolution	1080×1920 px
Length	5s – 1 min (60s)
Max file size	500 MB
File formats	MP4, MOV
Captioning	On-screen text recommended; ad plays full-screen on app open with sound-on by default.
Safe zone	Standard 9:16 safe zone applies; first 3 seconds are the auto-play hook.
Audio rules	Commercial Music Library or self-licensed only.
Headline	100 chars max
Body / primary text	100 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Same as In-Feed; AIGC label when applicable.

Branded Hashtag Challenge

Aspect ratios	9:16
Resolution	720×1280 px minimum, 1080×1920 recommended
Length	12s – 15s
Max file size	100 MB
File formats	MP4, MPEG, 3GP, AVI, MOV
Captioning	Hashtag and challenge instructions on-screen; standard 9:16 sound-off considerations apply.
Safe zone	Discover-tab banner is TikTok-designed; submitted assets render in the campaign Pages area within standard 9:16 safe zone.
Audio rules	Branded sound or commercial-cleared track only. Original sounds require written music rights.
Headline	20 chars max
Body / primary text	100 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Challenge page carries TikTok-applied 'Sponsored' label. Participating creators must individually disclose paid participation.

Source: TikTok Ads Manager — Auction In-Feed Ads Help Center.

Instagram

Meta Ads Manager unifies Feed, Stories, Reels, Explore, and Shop placements; each ad set can opt into multiple placements with placement-specific creative.

Stories + Reels safe-zone guidance was unified in March 2026 around a 1440×2560 high-density canvas with 14% top / 20-35% bottom / 6% sides clearance.

Reels Ad

Aspect ratios	9:16
Resolution	1080×1920 px (1440×2560 for high-density)
Length	1s – 1.5 min (90s)
Max file size	4 GB
File formats	MP4, MOV
Captioning	On-screen text required for the silent ~60% of viewers; auto-captions available via Meta's caption tool.
Safe zone	Top 14% (~358 px on 1440×2560) for handle + sound icon; bottom 20-35% (~512-896 px) for profile icon, primary text, CTA bar; 6% on each side (~87 px) for the action stack.
Audio rules	Instagram organic Music Library is OFF-LIMITS for ads. Use Meta Sound Collection (commercial-cleared) or upload your own licensed track. Original UGC sounds require written creator permission.
Headline	40 chars max
Body / primary text	125 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Paid Partnership tag (creator + brand both confirmed); FTC #ad in caption opener; AIGC disclosure if Meta's AI labeling threshold is met.

Feed Video / Image

Aspect ratios	1:1, 4:5
Resolution	1080×1080 (1:1) or 1080×1350 (4:5)
Length	1s min, 4h max (~14400s)
Max file size	4 GB
File formats	MP4, MOV, JPG, PNG
Captioning	Captions recommended; Feed plays muted on initial scroll, sound-on after tap or unmute.
Safe zone	Avoid placing critical text in top 250 px or bottom 250 px; 5% side padding accounts for adaptive cropping.
Audio rules	Same Meta Sound Collection / self-licensed rules as Reels. UGC library is consumer-only.
Headline	40 chars max
Body / primary text	125 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Paid Partnership tag where applicable; FTC #ad first-line.

Stories Ad

Aspect ratios	9:16
Resolution	1080×1920 px
Length	1s – 1 min (60s)
Max file size	4 GB
File formats	MP4, MOV, JPG, PNG
Captioning	On-screen text strongly recommended; Stories auto-plays sound-on but Instagram's mute carries through ad slot.
Safe zone	Top ~250 px (profile + close button) and bottom ~250-340 px (CTA sticker + reply bar) must be clear of important content.
Audio rules	Same rules as Reels: Meta Sound Collection or licensed.
Headline	40 chars max
Body / primary text	125 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Paid Partnership tag; Sponsored label applied automatically; FTC overlay in opening 3 seconds.

Carousel

Aspect ratios	1:1, 4:5
Resolution	1080×1080 or 1080×1350; same ratio across all cards
Length	0s – 1 min (60s)
Max file size	4 GB
File formats	MP4, MOV, JPG, PNG
Captioning	On-screen text recommended per card; each card has its own headline + link.
Safe zone	2-10 cards; first card carries 60-80% of stop-the-scroll weight, design accordingly.
Audio rules	Per-card video follows Reels/Feed audio rules.
Headline	40 chars max
Body / primary text	125 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Paid Partnership tag; FTC #ad in primary caption.

Source: Meta — Instagram Reels Ads Guide.

Facebook

Right Column is the only Meta surface still locked to 1:1; everything else (Feed, Reels, Stories, Marketplace) follows Instagram-equivalent specs.

Reels Ad

Aspect ratios	9:16
Resolution	1080×1920 px
Length	1s – 1.5 min (90s)
Max file size	4 GB
File formats	MP4, MOV
Captioning	On-screen text recommended; same sound-off design considerations as Instagram Reels.
Safe zone	Top ~14% and bottom ~14-15% reserved for Facebook UI overlays; keep logos and key text out of those bands.
Audio rules	Meta Sound Collection or self-licensed only. Consumer music library is unavailable to ads.
Headline	40 chars max
Body / primary text	125 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Paid Partnership label; AIGC label if applicable.

Feed Video / Image

Aspect ratios	1:1, 4:5
Resolution	1080×1080 (1:1) or 1080×1350 (4:5) minimum
Length	1s min, 4h max (~14400s)
Max file size	4 GB
File formats	MP4, MOV, JPG, PNG
Captioning	Captions recommended; Feed scrolls muted on autoplay across most of the user base.
Safe zone	Top 250 px and bottom 250 px reserved; right-rail and chrome consume side margins on web.
Audio rules	Meta Sound Collection / self-licensed.
Headline	40 chars max
Body / primary text	125 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Paid Partnership label; FTC #ad opening line.

Stories Ad

Aspect ratios	9:16
Resolution	1080×1920 px
Length	1s – 2 min (120s)
Max file size	4 GB
File formats	MP4, MOV, JPG, PNG
Captioning	On-screen text strongly recommended.
Safe zone	Top 250 px (profile + close) and bottom 250-340 px (CTA + reply) clear.
Audio rules	Meta Sound Collection / self-licensed.
Headline	40 chars max
Body / primary text	125 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Sponsored label auto-applied; FTC overlay in first 3 sec.

Carousel

Aspect ratios	1:1, 4:5, 9:16
Resolution	1080×1080 (Feed), 1080×1350 (Feed 4:5), 1080×1920 (Stories carousel)
Length	0s – 1 min (60s)
Max file size	4 GB
File formats	MP4, MOV, JPG, PNG
Captioning	Per-card on-screen text recommended.
Safe zone	First card is load-bearing; right-rail placements only render card #1.
Audio rules	Same as Feed/Reels.
Headline	40 chars max
Body / primary text	125 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Paid Partnership label when applicable.

Marketplace Ad

Aspect ratios	1:1
Resolution	1080×1080 px
Length	0s – 4 min (240s)
Max file size	4 GB
File formats	MP4, MOV, JPG, PNG
Captioning	Captions recommended; viewers in Marketplace browse with high purchase intent and product-detail focus.
Safe zone	Design like an organic listing — minimal overlay text, clean product photography, pricing in metadata not on-canvas.
Audio rules	Meta Sound Collection / self-licensed.
Headline	40 chars max
Body / primary text	125 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Sponsored label auto-applied.

Right Column

Aspect ratios	1:1
Resolution	1080×1080 px (renders small; 254×133 minimum)
Length	Image / static only
Max file size	30 MB
File formats	JPG, PNG
Captioning	No text overlay recommended — renders small enough that on-image text becomes illegible.
Safe zone	Full image renders inside small thumbnail; no platform UI overlay, but legibility is the real constraint.
Audio rules	Image-only placement.
Headline	25 chars max
Body / primary text	125 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Sponsored label auto-applied.

Source: Meta — Facebook Ads Guide.

YouTube

Google Ads Demand Gen (formerly Video Action Campaigns) consolidates Shorts, in-stream, Discover, and Gmail placements; Masthead remains reservation-only.

April 2026 Demand Gen Drop added 9:16 image-asset support for Shorts and channel-level Shorts breakdowns in reporting.

Shorts Ad (via Demand Gen)

Aspect ratios	9:16
Resolution	1080×1920 px (1080p)
Length	1s – 3 min (180s)
Max file size	128 GB
File formats	MP4, MOV, MPEG4, AVI, WMV, FLV, 3GPP, WebM
Captioning	Captions recommended; Shorts viewers split ~25% muted, ~75% sound-on (higher sound-on share than TikTok/Reels).
Safe zone	Title appears below the thumbnail in the Shorts shelf; in-feed UI eats top 80 px and bottom 220 px on standard renders.
Audio rules	YouTube Audio Library, Creator Music, or self-licensed only. Trending UGC sounds are NOT licensed for ads.
Headline	40 chars max
Body / primary text	90 chars max
CTA	10 chars max
Disclosure	Sponsored label auto-applied; AIGC disclosure via altered-content checkbox at upload if AI was used.

In-Stream Skippable

Aspect ratios	16:9, 9:16, 1:1
Resolution	1920×1080 (16:9); 1080p preferred
Length	12s min, 12h max (~43200s)
Max file size	128 GB
File formats	MP4, MOV, MPEG4, AVI, WMV, MPEGPS, FLV, 3GPP, WebM
Captioning	Closed captions strongly recommended; viewers can skip after 5 seconds.
Safe zone	Skip button overlays bottom-right at ~5 seconds; CTA companion card stacks on the right rail.
Audio rules	YouTube Audio Library, Creator Music, or self-licensed.
Headline	15 chars max
Body / primary text	90 chars max
CTA	10 chars max
Disclosure	Auto-Sponsored badge; AIGC checkbox at upload.

In-Stream Non-Skippable

Aspect ratios	16:9, 9:16, 1:1
Resolution	1920×1080 (16:9)
Length	7s – 15s
Max file size	128 GB
File formats	MP4, MOV, MPEG4, AVI, WMV, MPEGPS, FLV, 3GPP, WebM
Captioning	Closed captions strongly recommended.
Safe zone	No skip button — full screen for the duration. CTA companion card on the right rail on desktop.
Audio rules	YouTube Audio Library, Creator Music, or self-licensed.
Headline	15 chars max
Body / primary text	90 chars max
CTA	10 chars max
Disclosure	Sponsored badge; AIGC checkbox.

Bumper Ad

Aspect ratios	16:9, 9:16, 1:1
Resolution	1920×1080 (16:9)
Length	1s – 6s
Max file size	128 GB
File formats	MP4, MOV, MPEG4, AVI, WMV, MPEGPS, FLV, 3GPP, WebM
Captioning	Captions optional but recommended — at 6 sec, every word counts.
Safe zone	No skip option; pure reach play. Visual punchline must land by frame 1.
Audio rules	YouTube Audio Library, Creator Music, or self-licensed.
Headline	15 chars max
Body / primary text	90 chars max
CTA	10 chars max
Disclosure	Sponsored badge; AIGC checkbox.

Demand Gen Campaign

Aspect ratios	16:9, 9:16, 1:1
Resolution	1080×1920 (Shorts) or 1920×1080 (Feed)
Length	6s – 3 min (180s)
Max file size	128 GB
File formats	MP4, MOV, MPEG4, WebM
Captioning	Captions recommended; campaign serves across Shorts, Watch feed, Discover, Gmail with different mute baselines.
Safe zone	Multi-surface — design to the strictest (Shorts 9:16) and let Google's responsive system crop for Discover/Gmail.
Audio rules	YouTube Audio Library, Creator Music, or self-licensed.
Headline	40 chars max
Body / primary text	90 chars max
CTA	10 chars max
Disclosure	Sponsored badge auto-applied per placement; AIGC checkbox covers all surfaces.

Masthead

Aspect ratios	16:9
Resolution	1920×1080 px or higher
Length	1s – 30s
Max file size	128 GB
File formats	MP4, MOV, MPEG4
Captioning	Captions strongly recommended — Masthead autoplays muted by default at top of YouTube Home.
Safe zone	Responsive layout serves desktop, mobile, tablet, and connected TV — keep critical text center-frame to survive every crop.
Audio rules	YouTube Audio Library, Creator Music, or self-licensed.
Headline	25 chars max
Body / primary text	90 chars max
CTA	10 chars max
Disclosure	Sponsored label auto-applied; reservation-only — purchased via Google rep (CPM or CPH).

Source: Google Ads Help — YouTube Shorts ads: asset specs.

Snapchat

Every Snapchat surface is locked to 9:16 full-screen; Snap's commercial Sounds library is fully licensed (unlike TikTok's UGC sounds), but consumer Sounds are organic-use-only.

Snap Ad (Single Video)

Aspect ratios	9:16
Resolution	1080×1920 px
Length	3s – 3 min (180s)
Max file size	1 GB
File formats	MP4, MOV
Captioning	On-screen text strongly recommended; Snap's median view duration on Snap Ads is under 6 seconds.
Safe zone	Top 150 px and bottom 150 px clear of critical content; CTA swipe arrow stacks bottom-center.
Audio rules	Snap Commercial Sounds library is fully licensed for paid use; consumer Sounds library is organic-only.
Headline	34 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Sponsored chrome auto-applied; FTC overlay in first 2 sec.

Story Ad

Aspect ratios	9:16
Resolution	1080×1920 per card; tile 360×600 px
Length	3s – 3 min (180s)
Max file size	1 GB
File formats	MP4, MOV, JPG, PNG
Captioning	Per-card on-screen text recommended.
Safe zone	Tile image (360×600, ≤2 MB PNG) renders in the Discover feed; cards inside follow standard 9:16 safe zone.
Audio rules	Snap Commercial Sounds or self-licensed.
Headline	34 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Sponsored chrome auto-applied.

Collection Ad

Aspect ratios	9:16
Resolution	1080×1920 (hero); 160×160 px product tiles
Length	3s – 3 min (180s)
Max file size	1 GB
File formats	MP4, MOV, JPG, PNG
Captioning	On-screen text recommended on hero asset.
Safe zone	Top 150 px and BOTTOM 450 px clear — the bottom buffer is larger than standard Snap Ads to accommodate the 4-product tile strip.
Audio rules	Snap Commercial Sounds or self-licensed.
Headline	34 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Sponsored chrome; per-product Shop Now/Book Now CTAs.

AR Lens

Aspect ratios	9:16
Resolution	Lens Studio render; icon 1024×1024 px
Length	3s – 3 min (180s)
Max file size	8 MB
File formats	LENS
Captioning	Lens UI carries call-to-action prompts; on-screen tap/hold cues render via Lens Studio overlays.
Safe zone	Lens Studio standard — keep brand callouts out of the face-tracking zone center-frame.
Audio rules	Audio bundled with the Lens must be self-licensed or pulled from Snap's commercial library.
Headline	25 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Sponsored badge on Lens icon in carousel.

Commercial (Non-Skippable)

Aspect ratios	9:16
Resolution	1080×1920 px
Length	6s – 3 min (180s)
Max file size	1 GB
File formats	MP4, MOV
Captioning	Captions strongly recommended; first 6 sec are forced-view.
Safe zone	Standard 9:16 safe zone; no skip UI for the first 6 sec (Extended Play allows skip after).
Audio rules	Snap Commercial Sounds or self-licensed.
Headline	34 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Sponsored chrome auto-applied.

Source: Snapchat Business Help — Single Image or Video Specifications.

2:3 portrait dominates the feed; 9:16 vertical applies only to Idea Pins and full-bleed Video Pins. Pin titles + descriptions act as both ad copy and search signal.

Standard Pin (Image Ad)

Aspect ratios	2:3
Resolution	1000×1500 px
Length	Image / static only
Max file size	20 MB
File formats	JPG, PNG
Captioning	Pin description (≤500 chars) doubles as alt-text and SEO signal; titles ≤100 chars (only first 40 visible in feed).
Safe zone	Bottom ~80 px reserved for save button + meta overlay; keep brand mark and key text out.
Audio rules	Image-only.
Headline	100 chars max
Body / primary text	500 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted by [Brand] label auto-applied.

Video Pin (≤30s)

Aspect ratios	1:1, 2:3, 9:16
Resolution	1080×1920 (9:16) or 1080×1080 (1:1) or 1000×1500 (2:3)
Length	4s – 30s
Max file size	2 GB
File formats	MP4, MOV, M4V
Captioning	Captions recommended; Pinterest video plays muted on initial scroll.
Safe zone	Same 80 px bottom reserve as Standard Pin; right-rail save button overlays at ~30 px from right.
Audio rules	Self-licensed music only — Pinterest does not provide a built-in licensed library for ads.
Headline	100 chars max
Body / primary text	500 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label auto-applied.

Video Pin (30s–60s)

Aspect ratios	1:1, 2:3, 9:16
Resolution	1080×1920 / 1080×1080 / 1000×1500
Length	30s – 1 min (60s)
Max file size	2 GB
File formats	MP4, MOV, M4V
Captioning	Captions required for sound-off comprehension; tutorial-style content dominates this length band.
Safe zone	Same as ≤30s Video Pin.
Audio rules	Self-licensed only.
Headline	100 chars max
Body / primary text	500 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label.

Idea Pin

Aspect ratios	9:16
Resolution	1080×1920 px
Length	0s – 1 min (60s)
Max file size	2 GB
File formats	MP4, MOV, JPG, PNG
Captioning	Per-page on-screen text supported via Pinterest's native sticker tools; up to 20 pages.
Safe zone	Top ~270 px (creator handle + sticker bar) and bottom ~180 px (page indicators + react bar) reserved.
Audio rules	Self-licensed only.
Headline	100 chars max
Body / primary text	500 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label.

Carousel Pin

Aspect ratios	1:1, 2:3
Resolution	1000×1000 or 1000×1500 (same ratio across all cards)
Length	Image / static only
Max file size	20 MB
File formats	JPG, PNG
Captioning	Same ad copy + alt-text rules as Standard Pin.
Safe zone	2-5 cards; card swipe indicators overlay bottom-center starting at ~60 px from bottom.
Audio rules	Image-only.
Headline	100 chars max
Body / primary text	500 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label.

Shopping Pin (Product)

Aspect ratios	2:3
Resolution	1000×1500 px
Length	Image / static only
Max file size	20 MB
File formats	JPG, PNG
Captioning	Pulls title + description from product feed; price + availability auto-render in pin chrome.
Safe zone	Bottom 80 px reserved; price/availability badges overlay.
Audio rules	Image-only.
Headline	100 chars max
Body / primary text	500 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label; product feed must declare merchant.

Source: Pinterest Business Help — Review ad specs.

Reddit ads serve in two surfaces — Feed (home/popular/community) and Conversation (in-thread). Free-Form Ads mimic native organic posts; headline char limits differ by surface.

Image Ad

Aspect ratios	4:5, 1:1, 4:3, 16:9
Resolution	1200×1500 (4:5), 1200×1200 (1:1), 1440×1080 (4:3), 1920×1080 (16:9)
Length	Image / static only
Max file size	3 MB
File formats	JPG, PNG
Captioning	On-image text optional; alt-text supported for accessibility.
Safe zone	Sticky bottom CTA strip ~60 px tall; comment-counter chrome overlays top-right at ~40 px.
Audio rules	Image-only.
Headline	150 chars max
Body / primary text	40000 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label auto-applied; comments enabled (or disabled) per ad set.

Video Ad

Aspect ratios	1:1, 4:5, 4:3, 16:9
Resolution	1080×1080 / 1080×1350 / 1440×1080 / 1920×1080
Length	5s – 15 min (900s)
Max file size	1 GB
File formats	MP4, MOV
Captioning	Captions strongly recommended; Reddit video autoplays muted in feed.
Safe zone	Bottom ~80 px reserved for vote arrows + comment count; CTA strip stacks below.
Audio rules	Self-licensed only.
Headline	150 chars max
Body / primary text	40000 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label.

Carousel Ad

Aspect ratios	4:5, 1:1, 4:3, 16:9
Resolution	Same dimensions as Image Ad; 2-6 cards, same ratio across all
Length	Image / static only
Max file size	20 MB
File formats	JPG, PNG, GIF
Captioning	Per-card optional on-image text.
Safe zone	Card-indicator dots overlay bottom-center.
Audio rules	Image-only (GIFs supported up to 3 MB per card).
Headline	150 chars max
Body / primary text	40000 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label.

Conversation Placement

Aspect ratios	4:5, 1:1, 4:3, 16:9
Resolution	Same as Image/Video; renders inline in comment threads
Length	0s – 15 min (900s)
Max file size	1 GB
File formats	JPG, PNG, MP4, MOV
Captioning	Captions recommended for video; tighter headline limit applies.
Safe zone	Renders between comment cards; thread chrome occupies ~50 px above and below.
Audio rules	Self-licensed for video; conversation placement is most often static.
Headline	100 chars max
Body / primary text	40000 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label; appears inside discussion context.

Free-Form Ad

Aspect ratios	N/A
Resolution	Rich-text post; optional image/video at standard ratios
Length	0s – 15 min (900s)
Max file size	1 GB
File formats	TXT, JPG, PNG, MP4
Captioning	Native-post mimicry; markdown supported. Captions on embedded video recommended.
Safe zone	Renders identically to organic Reddit post.
Audio rules	Self-licensed for embedded video.
Headline	300 chars max
Body / primary text	40000 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label still auto-applied — ad cannot be made indistinguishable from organic.

Source: Reddit Ads Help — Ad Unit Specifications.

B2B-skewed targeting and a strict 200 MB video cap mean LinkedIn creative often runs lower-resolution than the feed peer set; Document Ads and Conversation Ads outperform Single Image for consideration.

Single Image Ad

Aspect ratios	1.91:1, 1:1, 4:5
Resolution	1200×627 (1.91:1), 1080×1080 (1:1), 1080×1350 (4:5)
Length	Image / static only
Max file size	5 MB
File formats	JPG, PNG, GIF
Captioning	Image-only; alt-text supported. 4:5 vertical and 1:1 mobile-only; 1.91:1 covers desktop.
Safe zone	LinkedIn chrome (profile pic + actor) overlays top ~60 px on mobile; bottom CTA bar ~60 px.
Audio rules	Image-only.
Headline	70 chars max
Body / primary text	150 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label auto-applied.

Video Ad

Aspect ratios	16:9, 1:1, 4:5, 9:16
Resolution	1920×1080 (16:9), 1080×1080 (1:1), 1080×1350 (4:5), 1080×1920 (9:16 mobile-only)
Length	3s – 30 min (1800s)
Max file size	200 MB
File formats	MP4
Captioning	Closed captions strongly recommended — LinkedIn video plays muted on autoplay across feed.
Safe zone	Top ~60 px (actor + headline) and bottom ~80 px (CTA + reactions) clear.
Audio rules	Self-licensed only. No platform-provided library.
Headline	70 chars max
Body / primary text	600 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label.

Document Ad

Aspect ratios	1:1, 4:5, 16:9
Resolution	1080×1080 / 1080×1350 / 1920×1080
Length	Image / static only
Max file size	100 MB
File formats	PDF, DOC, DOCX, PPT, PPTX
Captioning	Document content rendered as carousel; on-page text is the entire creative payload.
Safe zone	First page is the hook; max 300 pages (or 1M words) hard cap, recommended ≤10 pages.
Audio rules	Document format.
Headline	70 chars max
Body / primary text	600 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label; gated-download requires email capture form configuration.

Carousel Ad

Aspect ratios	1:1
Resolution	1080×1080 per card (square only)
Length	Image / static only
Max file size	10 MB
File formats	JPG, PNG
Captioning	Per-card on-image text; video NOT supported in carousels.
Safe zone	Card-indicator dots overlay bottom-center.
Audio rules	Image-only.
Headline	45 chars max
Body / primary text	255 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label.

Event Ad

Aspect ratios	4:1
Resolution	LinkedIn Event banner auto-pulled; 1584×396 px source
Length	Image / static only
Max file size	5 MB
File formats	JPG, PNG
Captioning	Image-only; event detail metadata renders below banner.
Safe zone	Event-banner safe zone — keep critical text out of left 200 px (avatar overlap) and right 100 px.
Audio rules	Image-only.
Headline	255 chars max
Body / primary text	600 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label.

X (Twitter)

X's Immersive Media Viewer makes 9:16 vertical the default for full-screen play; standard Timeline ads still run 16:9 / 1:1 / 1.91:1.

Promoted Image

Aspect ratios	1.91:1, 1:1
Resolution	1200×628 (1.91:1) or 1200×1200 (1:1)
Length	Image / static only
Max file size	5 MB
File formats	JPG, PNG
Captioning	Image-only; alt-text supported.
Safe zone	Engagement bar (reply/repost/like/bookmark) overlays bottom ~50 px on the timeline rendition.
Audio rules	Image-only.
Headline	70 chars max
Body / primary text	280 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label auto-applied above post body.

Promoted Video

Aspect ratios	16:9, 1:1, 9:16
Resolution	1920×1080 (16:9), 1200×1200 (1:1), 1080×1920 (9:16)
Length	1s – 2.3 min (140s)
Max file size	1 GB
File formats	MP4, MOV
Captioning	Captions strongly recommended; Timeline video plays muted on autoplay.
Safe zone	Top ~60 px (actor) and bottom ~50 px (engagement bar) reserved on the standard Timeline rendition.
Audio rules	Self-licensed only.
Headline	70 chars max
Body / primary text	280 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label.

Carousel Ad

Aspect ratios	1.91:1, 1:1
Resolution	800×418 (1.91:1) or 800×800 (1:1); 2-6 slides
Length	0s – 2.3 min (140s)
Max file size	1 GB
File formats	JPG, PNG, MP4, MOV
Captioning	Per-slide on-image text optional.
Safe zone	Card-indicator dots overlay bottom-center; engagement bar on outer chrome.
Audio rules	Self-licensed for video slides.
Headline	70 chars max
Body / primary text	280 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label.

Vertical Video Ad (Immersive Media Viewer)

Aspect ratios	9:16
Resolution	1080×1920 px
Length	1s – 2.3 min (140s)
Max file size	1 GB
File formats	MP4, MOV
Captioning	On-screen text recommended even though Vertical Video Ads autoplay SOUND-ON in the Immersive Viewer.
Safe zone	Top ~120 px (close button + handle) and bottom ~180 px (CTA + engagement bar) reserved; visual punchline by frame 3.
Audio rules	Self-licensed only.
Headline	70 chars max
Body / primary text	280 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label.

Source: X Business — Creative Ad Specifications.

Threads

Meta opened Threads ads globally to all advertisers in January 2026 after a yearlong limited beta. Placement defaults to ON in Advantage+ and Manual Placements; opt-out is per-campaign.

Meta hasn't published a Threads-specific ad-spec doc; specs below are inherited from Instagram Feed equivalents per Meta's January 2026 global-rollout announcement. CPMs were ~30-40% below Instagram in the early land-grab window.

Image Ad

Aspect ratios	4:5, 1:1, 1.91:1
Resolution	1080×1350 (4:5, recommended), 1080×1080 (1:1), 1200×628 (1.91:1)
Length	Image / static only
Max file size	30 MB
File formats	JPG, PNG
Captioning	Image-only; primary text is the post body.
Safe zone	Threads chrome (profile + actor) overlays top ~60 px; reply/repost/like/share bar overlays bottom ~50 px.
Audio rules	Image-only.
Headline	40 chars max
Body / primary text	500 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Sponsored label auto-applied; Paid Partnership tag inherits from Meta Ads Manager.

Video Ad

Aspect ratios	9:16, 4:5, 1:1
Resolution	1080×1920 (9:16) or 1080×1350 (4:5) or 1080×1080 (1:1)
Length	1s – 5 min (300s)
Max file size	4 GB
File formats	MP4, MOV
Captioning	Captions strongly recommended; Threads autoplay defaults muted (matches Instagram Feed behavior).
Safe zone	Same chrome overlap as Image Ad — top ~60 px + bottom ~50 px clear.
Audio rules	Meta Sound Collection (commercial-cleared) or self-licensed.
Headline	40 chars max
Body / primary text	500 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Sponsored label.

Carousel Ad

Aspect ratios	1:1, 4:5
Resolution	1080×1080 or 1080×1350; up to 10 cards
Length	0s – 5 min (300s)
Max file size	4 GB
File formats	MP4, MOV, JPG, PNG
Captioning	Mixed-ratio cards technically supported, but Meta recommends uniform ratio across all cards for consistency.
Safe zone	Per-card chrome match Image Ad.
Audio rules	Same as Video.
Headline	40 chars max
Body / primary text	500 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Sponsored label.

Source: TechCrunch — Threads rolls out ads to all users worldwide (Jan 2026).

Cross-platform takeaways

—9:16 is the universal floor. Every short-form-video surface (TikTok, Reels, Shorts, Snapchat, Pinterest Idea Pin, X Vertical Video, Threads Video) accepts 1080×1920. Cutting one 9:16 master and cropping down to 1:1 or 4:5 for Feed surfaces is faster than the reverse.
—Captions are mandatory in 2026. Every platform here recommends or requires them; sound-off prevalence ranges from ~25% (Shorts) to ~85% (TikTok) but no platform is sound-on-by-default for the entire feed. The exception worth knowing: X Vertical Video Ads in the Immersive Media Viewer autoplay sound-on.
—Audio licensing splits cleanly. TikTok, Meta, YouTube, and Snapchat each maintain a commercial-cleared library separate from their consumer library; using a trending UGC sound on a paid placement is a hard reject. Pinterest, Reddit, LinkedIn, and X have no platform-provided library — bring your own license.
—AIGC labels are now table stakes. TikTok, Meta (across Instagram/Facebook/Threads), and YouTube each require advertisers to flag AI-generated voice, face, or core performance. FTC guidance from late 2024 (refined 2026) makes "ad" alone insufficient when AI was used — disclose both.
—Two outliers worth flagging. LinkedIn caps video at 200 MB (vs 1+ GB everywhere else), forcing tighter encoding. Reddit Free-Form Ads have a 40,000-character body — order-of-magnitude longer than any other primary-text limit on this page.

How to read this page

TikTok

Auction (In-Feed, Spark) and Reservation (TopView, Branded) sit on the same 9:16 canvas; Spark Ads inherit organic post specs and have no duration cap.

July 2025 update: Non-Spark In-Feed Ads now support up to 10 minutes (was 60 seconds). Commercial-content disclosure became mandatory for all promotional posts on September 1, 2025.

In-Feed Ad (Auction)

Aspect ratios	9:16, 1:1, 16:9
Resolution	1080×1920 px (9:16 native)
Length	5s – 10 min (600s)
Max file size	500 MB
File formats	MP4, MOV, MPEG, AVI, GIF
Captioning	On-screen text strongly recommended; ~85% of TikTok feed viewers watch muted.
Safe zone	Top ~130 px reserved for status bar; bottom ~482 px houses caption, username, and right-rail action stack (like, comment, share, save).
Audio rules	Must use TikTok Commercial Music Library or upload self-licensed audio. Trending UGC sounds from the consumer library are NOT licensed for paid placements.
Headline	100 chars max
Body / primary text	100 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Toggle TikTok's Commercial Content Disclosure on; AIGC label required if AI-generated voice, face, or core performance is used. FTC #ad in caption as belt-and-suspenders.

Spark Ad

Aspect ratios	9:16, 1:1, 16:9
Resolution	Inherits source post; 1080×1920 preferred
Length	1s – 10 min (600s)
Max file size	500 MB
File formats	MP4, MOV, MPEG, AVI, GIF
Captioning	Inherits the organic post; caption can be edited (≤100 chars, emoji + hashtag allowed) or left blank.
Safe zone	Same 9:16 safe zone as In-Feed; expect the creator handle + organic caption layer to compress the right rail further.
Audio rules	Sparked post must use a commercial-cleared track. If the organic uses a UGC-library sound, it must be replaced before Sparking.
Headline	100 chars max
Body / primary text	100 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Paid Partnership toggle in the original post, plus TikTok's Branded Content disclosure. The creator's own FTC #ad obligations carry over.

TopView

Aspect ratios	9:16
Resolution	1080×1920 px
Length	5s – 1 min (60s)
Max file size	500 MB
File formats	MP4, MOV
Captioning	On-screen text recommended; ad plays full-screen on app open with sound-on by default.
Safe zone	Standard 9:16 safe zone applies; first 3 seconds are the auto-play hook.
Audio rules	Commercial Music Library or self-licensed only.
Headline	100 chars max
Body / primary text	100 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Same as In-Feed; AIGC label when applicable.

Branded Hashtag Challenge

Aspect ratios	9:16
Resolution	720×1280 px minimum, 1080×1920 recommended
Length	12s – 15s
Max file size	100 MB
File formats	MP4, MPEG, 3GP, AVI, MOV
Captioning	Hashtag and challenge instructions on-screen; standard 9:16 sound-off considerations apply.
Safe zone	Discover-tab banner is TikTok-designed; submitted assets render in the campaign Pages area within standard 9:16 safe zone.
Audio rules	Branded sound or commercial-cleared track only. Original sounds require written music rights.
Headline	20 chars max
Body / primary text	100 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Challenge page carries TikTok-applied 'Sponsored' label. Participating creators must individually disclose paid participation.

Source: TikTok Ads Manager — Auction In-Feed Ads Help Center.

Instagram

Meta Ads Manager unifies Feed, Stories, Reels, Explore, and Shop placements; each ad set can opt into multiple placements with placement-specific creative.

Stories + Reels safe-zone guidance was unified in March 2026 around a 1440×2560 high-density canvas with 14% top / 20-35% bottom / 6% sides clearance.

Reels Ad

Aspect ratios	9:16
Resolution	1080×1920 px (1440×2560 for high-density)
Length	1s – 1.5 min (90s)
Max file size	4 GB
File formats	MP4, MOV
Captioning	On-screen text required for the silent ~60% of viewers; auto-captions available via Meta's caption tool.
Safe zone	Top 14% (~358 px on 1440×2560) for handle + sound icon; bottom 20-35% (~512-896 px) for profile icon, primary text, CTA bar; 6% on each side (~87 px) for the action stack.
Audio rules	Instagram organic Music Library is OFF-LIMITS for ads. Use Meta Sound Collection (commercial-cleared) or upload your own licensed track. Original UGC sounds require written creator permission.
Headline	40 chars max
Body / primary text	125 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Paid Partnership tag (creator + brand both confirmed); FTC #ad in caption opener; AIGC disclosure if Meta's AI labeling threshold is met.

Feed Video / Image

Aspect ratios	1:1, 4:5
Resolution	1080×1080 (1:1) or 1080×1350 (4:5)
Length	1s min, 4h max (~14400s)
Max file size	4 GB
File formats	MP4, MOV, JPG, PNG
Captioning	Captions recommended; Feed plays muted on initial scroll, sound-on after tap or unmute.
Safe zone	Avoid placing critical text in top 250 px or bottom 250 px; 5% side padding accounts for adaptive cropping.
Audio rules	Same Meta Sound Collection / self-licensed rules as Reels. UGC library is consumer-only.
Headline	40 chars max
Body / primary text	125 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Paid Partnership tag where applicable; FTC #ad first-line.

Stories Ad

Aspect ratios	9:16
Resolution	1080×1920 px
Length	1s – 1 min (60s)
Max file size	4 GB
File formats	MP4, MOV, JPG, PNG
Captioning	On-screen text strongly recommended; Stories auto-plays sound-on but Instagram's mute carries through ad slot.
Safe zone	Top ~250 px (profile + close button) and bottom ~250-340 px (CTA sticker + reply bar) must be clear of important content.
Audio rules	Same rules as Reels: Meta Sound Collection or licensed.
Headline	40 chars max
Body / primary text	125 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Paid Partnership tag; Sponsored label applied automatically; FTC overlay in opening 3 seconds.

Carousel

Aspect ratios	1:1, 4:5
Resolution	1080×1080 or 1080×1350; same ratio across all cards
Length	0s – 1 min (60s)
Max file size	4 GB
File formats	MP4, MOV, JPG, PNG
Captioning	On-screen text recommended per card; each card has its own headline + link.
Safe zone	2-10 cards; first card carries 60-80% of stop-the-scroll weight, design accordingly.
Audio rules	Per-card video follows Reels/Feed audio rules.
Headline	40 chars max
Body / primary text	125 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Paid Partnership tag; FTC #ad in primary caption.

Source: Meta — Instagram Reels Ads Guide.

Facebook

Right Column is the only Meta surface still locked to 1:1; everything else (Feed, Reels, Stories, Marketplace) follows Instagram-equivalent specs.

Reels Ad

Aspect ratios	9:16
Resolution	1080×1920 px
Length	1s – 1.5 min (90s)
Max file size	4 GB
File formats	MP4, MOV
Captioning	On-screen text recommended; same sound-off design considerations as Instagram Reels.
Safe zone	Top ~14% and bottom ~14-15% reserved for Facebook UI overlays; keep logos and key text out of those bands.
Audio rules	Meta Sound Collection or self-licensed only. Consumer music library is unavailable to ads.
Headline	40 chars max
Body / primary text	125 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Paid Partnership label; AIGC label if applicable.

Feed Video / Image

Aspect ratios	1:1, 4:5
Resolution	1080×1080 (1:1) or 1080×1350 (4:5) minimum
Length	1s min, 4h max (~14400s)
Max file size	4 GB
File formats	MP4, MOV, JPG, PNG
Captioning	Captions recommended; Feed scrolls muted on autoplay across most of the user base.
Safe zone	Top 250 px and bottom 250 px reserved; right-rail and chrome consume side margins on web.
Audio rules	Meta Sound Collection / self-licensed.
Headline	40 chars max
Body / primary text	125 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Paid Partnership label; FTC #ad opening line.

Stories Ad

Aspect ratios	9:16
Resolution	1080×1920 px
Length	1s – 2 min (120s)
Max file size	4 GB
File formats	MP4, MOV, JPG, PNG
Captioning	On-screen text strongly recommended.
Safe zone	Top 250 px (profile + close) and bottom 250-340 px (CTA + reply) clear.
Audio rules	Meta Sound Collection / self-licensed.
Headline	40 chars max
Body / primary text	125 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Sponsored label auto-applied; FTC overlay in first 3 sec.

Carousel

Aspect ratios	1:1, 4:5, 9:16
Resolution	1080×1080 (Feed), 1080×1350 (Feed 4:5), 1080×1920 (Stories carousel)
Length	0s – 1 min (60s)
Max file size	4 GB
File formats	MP4, MOV, JPG, PNG
Captioning	Per-card on-screen text recommended.
Safe zone	First card is load-bearing; right-rail placements only render card #1.
Audio rules	Same as Feed/Reels.
Headline	40 chars max
Body / primary text	125 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Paid Partnership label when applicable.

Marketplace Ad

Aspect ratios	1:1
Resolution	1080×1080 px
Length	0s – 4 min (240s)
Max file size	4 GB
File formats	MP4, MOV, JPG, PNG
Captioning	Captions recommended; viewers in Marketplace browse with high purchase intent and product-detail focus.
Safe zone	Design like an organic listing — minimal overlay text, clean product photography, pricing in metadata not on-canvas.
Audio rules	Meta Sound Collection / self-licensed.
Headline	40 chars max
Body / primary text	125 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Sponsored label auto-applied.

Right Column

Aspect ratios	1:1
Resolution	1080×1080 px (renders small; 254×133 minimum)
Length	Image / static only
Max file size	30 MB
File formats	JPG, PNG
Captioning	No text overlay recommended — renders small enough that on-image text becomes illegible.
Safe zone	Full image renders inside small thumbnail; no platform UI overlay, but legibility is the real constraint.
Audio rules	Image-only placement.
Headline	25 chars max
Body / primary text	125 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Sponsored label auto-applied.

Source: Meta — Facebook Ads Guide.

YouTube

Google Ads Demand Gen (formerly Video Action Campaigns) consolidates Shorts, in-stream, Discover, and Gmail placements; Masthead remains reservation-only.

April 2026 Demand Gen Drop added 9:16 image-asset support for Shorts and channel-level Shorts breakdowns in reporting.

Shorts Ad (via Demand Gen)

Aspect ratios	9:16
Resolution	1080×1920 px (1080p)
Length	1s – 3 min (180s)
Max file size	128 GB
File formats	MP4, MOV, MPEG4, AVI, WMV, FLV, 3GPP, WebM
Captioning	Captions recommended; Shorts viewers split ~25% muted, ~75% sound-on (higher sound-on share than TikTok/Reels).
Safe zone	Title appears below the thumbnail in the Shorts shelf; in-feed UI eats top 80 px and bottom 220 px on standard renders.
Audio rules	YouTube Audio Library, Creator Music, or self-licensed only. Trending UGC sounds are NOT licensed for ads.
Headline	40 chars max
Body / primary text	90 chars max
CTA	10 chars max
Disclosure	Sponsored label auto-applied; AIGC disclosure via altered-content checkbox at upload if AI was used.

In-Stream Skippable

Aspect ratios	16:9, 9:16, 1:1
Resolution	1920×1080 (16:9); 1080p preferred
Length	12s min, 12h max (~43200s)
Max file size	128 GB
File formats	MP4, MOV, MPEG4, AVI, WMV, MPEGPS, FLV, 3GPP, WebM
Captioning	Closed captions strongly recommended; viewers can skip after 5 seconds.
Safe zone	Skip button overlays bottom-right at ~5 seconds; CTA companion card stacks on the right rail.
Audio rules	YouTube Audio Library, Creator Music, or self-licensed.
Headline	15 chars max
Body / primary text	90 chars max
CTA	10 chars max
Disclosure	Auto-Sponsored badge; AIGC checkbox at upload.

In-Stream Non-Skippable

Aspect ratios	16:9, 9:16, 1:1
Resolution	1920×1080 (16:9)
Length	7s – 15s
Max file size	128 GB
File formats	MP4, MOV, MPEG4, AVI, WMV, MPEGPS, FLV, 3GPP, WebM
Captioning	Closed captions strongly recommended.
Safe zone	No skip button — full screen for the duration. CTA companion card on the right rail on desktop.
Audio rules	YouTube Audio Library, Creator Music, or self-licensed.
Headline	15 chars max
Body / primary text	90 chars max
CTA	10 chars max
Disclosure	Sponsored badge; AIGC checkbox.

Bumper Ad

Aspect ratios	16:9, 9:16, 1:1
Resolution	1920×1080 (16:9)
Length	1s – 6s
Max file size	128 GB
File formats	MP4, MOV, MPEG4, AVI, WMV, MPEGPS, FLV, 3GPP, WebM
Captioning	Captions optional but recommended — at 6 sec, every word counts.
Safe zone	No skip option; pure reach play. Visual punchline must land by frame 1.
Audio rules	YouTube Audio Library, Creator Music, or self-licensed.
Headline	15 chars max
Body / primary text	90 chars max
CTA	10 chars max
Disclosure	Sponsored badge; AIGC checkbox.

Demand Gen Campaign

Aspect ratios	16:9, 9:16, 1:1
Resolution	1080×1920 (Shorts) or 1920×1080 (Feed)
Length	6s – 3 min (180s)
Max file size	128 GB
File formats	MP4, MOV, MPEG4, WebM
Captioning	Captions recommended; campaign serves across Shorts, Watch feed, Discover, Gmail with different mute baselines.
Safe zone	Multi-surface — design to the strictest (Shorts 9:16) and let Google's responsive system crop for Discover/Gmail.
Audio rules	YouTube Audio Library, Creator Music, or self-licensed.
Headline	40 chars max
Body / primary text	90 chars max
CTA	10 chars max
Disclosure	Sponsored badge auto-applied per placement; AIGC checkbox covers all surfaces.

Masthead

Aspect ratios	16:9
Resolution	1920×1080 px or higher
Length	1s – 30s
Max file size	128 GB
File formats	MP4, MOV, MPEG4
Captioning	Captions strongly recommended — Masthead autoplays muted by default at top of YouTube Home.
Safe zone	Responsive layout serves desktop, mobile, tablet, and connected TV — keep critical text center-frame to survive every crop.
Audio rules	YouTube Audio Library, Creator Music, or self-licensed.
Headline	25 chars max
Body / primary text	90 chars max
CTA	10 chars max
Disclosure	Sponsored label auto-applied; reservation-only — purchased via Google rep (CPM or CPH).

Source: Google Ads Help — YouTube Shorts ads: asset specs.

Snapchat

Every Snapchat surface is locked to 9:16 full-screen; Snap's commercial Sounds library is fully licensed (unlike TikTok's UGC sounds), but consumer Sounds are organic-use-only.

Snap Ad (Single Video)

Aspect ratios	9:16
Resolution	1080×1920 px
Length	3s – 3 min (180s)
Max file size	1 GB
File formats	MP4, MOV
Captioning	On-screen text strongly recommended; Snap's median view duration on Snap Ads is under 6 seconds.
Safe zone	Top 150 px and bottom 150 px clear of critical content; CTA swipe arrow stacks bottom-center.
Audio rules	Snap Commercial Sounds library is fully licensed for paid use; consumer Sounds library is organic-only.
Headline	34 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Sponsored chrome auto-applied; FTC overlay in first 2 sec.

Story Ad

Aspect ratios	9:16
Resolution	1080×1920 per card; tile 360×600 px
Length	3s – 3 min (180s)
Max file size	1 GB
File formats	MP4, MOV, JPG, PNG
Captioning	Per-card on-screen text recommended.
Safe zone	Tile image (360×600, ≤2 MB PNG) renders in the Discover feed; cards inside follow standard 9:16 safe zone.
Audio rules	Snap Commercial Sounds or self-licensed.
Headline	34 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Sponsored chrome auto-applied.

Collection Ad

Aspect ratios	9:16
Resolution	1080×1920 (hero); 160×160 px product tiles
Length	3s – 3 min (180s)
Max file size	1 GB
File formats	MP4, MOV, JPG, PNG
Captioning	On-screen text recommended on hero asset.
Safe zone	Top 150 px and BOTTOM 450 px clear — the bottom buffer is larger than standard Snap Ads to accommodate the 4-product tile strip.
Audio rules	Snap Commercial Sounds or self-licensed.
Headline	34 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Sponsored chrome; per-product Shop Now/Book Now CTAs.

AR Lens

Aspect ratios	9:16
Resolution	Lens Studio render; icon 1024×1024 px
Length	3s – 3 min (180s)
Max file size	8 MB
File formats	LENS
Captioning	Lens UI carries call-to-action prompts; on-screen tap/hold cues render via Lens Studio overlays.
Safe zone	Lens Studio standard — keep brand callouts out of the face-tracking zone center-frame.
Audio rules	Audio bundled with the Lens must be self-licensed or pulled from Snap's commercial library.
Headline	25 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Sponsored badge on Lens icon in carousel.

Commercial (Non-Skippable)

Aspect ratios	9:16
Resolution	1080×1920 px
Length	6s – 3 min (180s)
Max file size	1 GB
File formats	MP4, MOV
Captioning	Captions strongly recommended; first 6 sec are forced-view.
Safe zone	Standard 9:16 safe zone; no skip UI for the first 6 sec (Extended Play allows skip after).
Audio rules	Snap Commercial Sounds or self-licensed.
Headline	34 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Sponsored chrome auto-applied.

Source: Snapchat Business Help — Single Image or Video Specifications.

2:3 portrait dominates the feed; 9:16 vertical applies only to Idea Pins and full-bleed Video Pins. Pin titles + descriptions act as both ad copy and search signal.

Standard Pin (Image Ad)

Aspect ratios	2:3
Resolution	1000×1500 px
Length	Image / static only
Max file size	20 MB
File formats	JPG, PNG
Captioning	Pin description (≤500 chars) doubles as alt-text and SEO signal; titles ≤100 chars (only first 40 visible in feed).
Safe zone	Bottom ~80 px reserved for save button + meta overlay; keep brand mark and key text out.
Audio rules	Image-only.
Headline	100 chars max
Body / primary text	500 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted by [Brand] label auto-applied.

Video Pin (≤30s)

Aspect ratios	1:1, 2:3, 9:16
Resolution	1080×1920 (9:16) or 1080×1080 (1:1) or 1000×1500 (2:3)
Length	4s – 30s
Max file size	2 GB
File formats	MP4, MOV, M4V
Captioning	Captions recommended; Pinterest video plays muted on initial scroll.
Safe zone	Same 80 px bottom reserve as Standard Pin; right-rail save button overlays at ~30 px from right.
Audio rules	Self-licensed music only — Pinterest does not provide a built-in licensed library for ads.
Headline	100 chars max
Body / primary text	500 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label auto-applied.

Video Pin (30s–60s)

Aspect ratios	1:1, 2:3, 9:16
Resolution	1080×1920 / 1080×1080 / 1000×1500
Length	30s – 1 min (60s)
Max file size	2 GB
File formats	MP4, MOV, M4V
Captioning	Captions required for sound-off comprehension; tutorial-style content dominates this length band.
Safe zone	Same as ≤30s Video Pin.
Audio rules	Self-licensed only.
Headline	100 chars max
Body / primary text	500 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label.

Idea Pin

Aspect ratios	9:16
Resolution	1080×1920 px
Length	0s – 1 min (60s)
Max file size	2 GB
File formats	MP4, MOV, JPG, PNG
Captioning	Per-page on-screen text supported via Pinterest's native sticker tools; up to 20 pages.
Safe zone	Top ~270 px (creator handle + sticker bar) and bottom ~180 px (page indicators + react bar) reserved.
Audio rules	Self-licensed only.
Headline	100 chars max
Body / primary text	500 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label.

Carousel Pin

Aspect ratios	1:1, 2:3
Resolution	1000×1000 or 1000×1500 (same ratio across all cards)
Length	Image / static only
Max file size	20 MB
File formats	JPG, PNG
Captioning	Same ad copy + alt-text rules as Standard Pin.
Safe zone	2-5 cards; card swipe indicators overlay bottom-center starting at ~60 px from bottom.
Audio rules	Image-only.
Headline	100 chars max
Body / primary text	500 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label.

Shopping Pin (Product)

Aspect ratios	2:3
Resolution	1000×1500 px
Length	Image / static only
Max file size	20 MB
File formats	JPG, PNG
Captioning	Pulls title + description from product feed; price + availability auto-render in pin chrome.
Safe zone	Bottom 80 px reserved; price/availability badges overlay.
Audio rules	Image-only.
Headline	100 chars max
Body / primary text	500 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label; product feed must declare merchant.

Source: Pinterest Business Help — Review ad specs.

Reddit ads serve in two surfaces — Feed (home/popular/community) and Conversation (in-thread). Free-Form Ads mimic native organic posts; headline char limits differ by surface.

Image Ad

Aspect ratios	4:5, 1:1, 4:3, 16:9
Resolution	1200×1500 (4:5), 1200×1200 (1:1), 1440×1080 (4:3), 1920×1080 (16:9)
Length	Image / static only
Max file size	3 MB
File formats	JPG, PNG
Captioning	On-image text optional; alt-text supported for accessibility.
Safe zone	Sticky bottom CTA strip ~60 px tall; comment-counter chrome overlays top-right at ~40 px.
Audio rules	Image-only.
Headline	150 chars max
Body / primary text	40000 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label auto-applied; comments enabled (or disabled) per ad set.

Video Ad

Aspect ratios	1:1, 4:5, 4:3, 16:9
Resolution	1080×1080 / 1080×1350 / 1440×1080 / 1920×1080
Length	5s – 15 min (900s)
Max file size	1 GB
File formats	MP4, MOV
Captioning	Captions strongly recommended; Reddit video autoplays muted in feed.
Safe zone	Bottom ~80 px reserved for vote arrows + comment count; CTA strip stacks below.
Audio rules	Self-licensed only.
Headline	150 chars max
Body / primary text	40000 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label.

Carousel Ad

Aspect ratios	4:5, 1:1, 4:3, 16:9
Resolution	Same dimensions as Image Ad; 2-6 cards, same ratio across all
Length	Image / static only
Max file size	20 MB
File formats	JPG, PNG, GIF
Captioning	Per-card optional on-image text.
Safe zone	Card-indicator dots overlay bottom-center.
Audio rules	Image-only (GIFs supported up to 3 MB per card).
Headline	150 chars max
Body / primary text	40000 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label.

Conversation Placement

Aspect ratios	4:5, 1:1, 4:3, 16:9
Resolution	Same as Image/Video; renders inline in comment threads
Length	0s – 15 min (900s)
Max file size	1 GB
File formats	JPG, PNG, MP4, MOV
Captioning	Captions recommended for video; tighter headline limit applies.
Safe zone	Renders between comment cards; thread chrome occupies ~50 px above and below.
Audio rules	Self-licensed for video; conversation placement is most often static.
Headline	100 chars max
Body / primary text	40000 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label; appears inside discussion context.

Free-Form Ad

Aspect ratios	N/A
Resolution	Rich-text post; optional image/video at standard ratios
Length	0s – 15 min (900s)
Max file size	1 GB
File formats	TXT, JPG, PNG, MP4
Captioning	Native-post mimicry; markdown supported. Captions on embedded video recommended.
Safe zone	Renders identically to organic Reddit post.
Audio rules	Self-licensed for embedded video.
Headline	300 chars max
Body / primary text	40000 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label still auto-applied — ad cannot be made indistinguishable from organic.

Source: Reddit Ads Help — Ad Unit Specifications.

Single Image Ad

Aspect ratios	1.91:1, 1:1, 4:5
Resolution	1200×627 (1.91:1), 1080×1080 (1:1), 1080×1350 (4:5)
Length	Image / static only
Max file size	5 MB
File formats	JPG, PNG, GIF
Captioning	Image-only; alt-text supported. 4:5 vertical and 1:1 mobile-only; 1.91:1 covers desktop.
Safe zone	LinkedIn chrome (profile pic + actor) overlays top ~60 px on mobile; bottom CTA bar ~60 px.
Audio rules	Image-only.
Headline	70 chars max
Body / primary text	150 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label auto-applied.

Video Ad

Aspect ratios	16:9, 1:1, 4:5, 9:16
Resolution	1920×1080 (16:9), 1080×1080 (1:1), 1080×1350 (4:5), 1080×1920 (9:16 mobile-only)
Length	3s – 30 min (1800s)
Max file size	200 MB
File formats	MP4
Captioning	Closed captions strongly recommended — LinkedIn video plays muted on autoplay across feed.
Safe zone	Top ~60 px (actor + headline) and bottom ~80 px (CTA + reactions) clear.
Audio rules	Self-licensed only. No platform-provided library.
Headline	70 chars max
Body / primary text	600 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label.

Document Ad

Aspect ratios	1:1, 4:5, 16:9
Resolution	1080×1080 / 1080×1350 / 1920×1080
Length	Image / static only
Max file size	100 MB
File formats	PDF, DOC, DOCX, PPT, PPTX
Captioning	Document content rendered as carousel; on-page text is the entire creative payload.
Safe zone	First page is the hook; max 300 pages (or 1M words) hard cap, recommended ≤10 pages.
Audio rules	Document format.
Headline	70 chars max
Body / primary text	600 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label; gated-download requires email capture form configuration.

Carousel Ad

Aspect ratios	1:1
Resolution	1080×1080 per card (square only)
Length	Image / static only
Max file size	10 MB
File formats	JPG, PNG
Captioning	Per-card on-image text; video NOT supported in carousels.
Safe zone	Card-indicator dots overlay bottom-center.
Audio rules	Image-only.
Headline	45 chars max
Body / primary text	255 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label.

Event Ad

Aspect ratios	4:1
Resolution	LinkedIn Event banner auto-pulled; 1584×396 px source
Length	Image / static only
Max file size	5 MB
File formats	JPG, PNG
Captioning	Image-only; event detail metadata renders below banner.
Safe zone	Event-banner safe zone — keep critical text out of left 200 px (avatar overlap) and right 100 px.
Audio rules	Image-only.
Headline	255 chars max
Body / primary text	600 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label.

X (Twitter)

X's Immersive Media Viewer makes 9:16 vertical the default for full-screen play; standard Timeline ads still run 16:9 / 1:1 / 1.91:1.

Promoted Image

Aspect ratios	1.91:1, 1:1
Resolution	1200×628 (1.91:1) or 1200×1200 (1:1)
Length	Image / static only
Max file size	5 MB
File formats	JPG, PNG
Captioning	Image-only; alt-text supported.
Safe zone	Engagement bar (reply/repost/like/bookmark) overlays bottom ~50 px on the timeline rendition.
Audio rules	Image-only.
Headline	70 chars max
Body / primary text	280 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label auto-applied above post body.

Promoted Video

Aspect ratios	16:9, 1:1, 9:16
Resolution	1920×1080 (16:9), 1200×1200 (1:1), 1080×1920 (9:16)
Length	1s – 2.3 min (140s)
Max file size	1 GB
File formats	MP4, MOV
Captioning	Captions strongly recommended; Timeline video plays muted on autoplay.
Safe zone	Top ~60 px (actor) and bottom ~50 px (engagement bar) reserved on the standard Timeline rendition.
Audio rules	Self-licensed only.
Headline	70 chars max
Body / primary text	280 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label.

Carousel Ad

Aspect ratios	1.91:1, 1:1
Resolution	800×418 (1.91:1) or 800×800 (1:1); 2-6 slides
Length	0s – 2.3 min (140s)
Max file size	1 GB
File formats	JPG, PNG, MP4, MOV
Captioning	Per-slide on-image text optional.
Safe zone	Card-indicator dots overlay bottom-center; engagement bar on outer chrome.
Audio rules	Self-licensed for video slides.
Headline	70 chars max
Body / primary text	280 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label.

Vertical Video Ad (Immersive Media Viewer)

Aspect ratios	9:16
Resolution	1080×1920 px
Length	1s – 2.3 min (140s)
Max file size	1 GB
File formats	MP4, MOV
Captioning	On-screen text recommended even though Vertical Video Ads autoplay SOUND-ON in the Immersive Viewer.
Safe zone	Top ~120 px (close button + handle) and bottom ~180 px (CTA + engagement bar) reserved; visual punchline by frame 3.
Audio rules	Self-licensed only.
Headline	70 chars max
Body / primary text	280 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Promoted label.

Source: X Business — Creative Ad Specifications.

Threads

Meta opened Threads ads globally to all advertisers in January 2026 after a yearlong limited beta. Placement defaults to ON in Advantage+ and Manual Placements; opt-out is per-campaign.

Image Ad

Aspect ratios	4:5, 1:1, 1.91:1
Resolution	1080×1350 (4:5, recommended), 1080×1080 (1:1), 1200×628 (1.91:1)
Length	Image / static only
Max file size	30 MB
File formats	JPG, PNG
Captioning	Image-only; primary text is the post body.
Safe zone	Threads chrome (profile + actor) overlays top ~60 px; reply/repost/like/share bar overlays bottom ~50 px.
Audio rules	Image-only.
Headline	40 chars max
Body / primary text	500 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Sponsored label auto-applied; Paid Partnership tag inherits from Meta Ads Manager.

Video Ad

Aspect ratios	9:16, 4:5, 1:1
Resolution	1080×1920 (9:16) or 1080×1350 (4:5) or 1080×1080 (1:1)
Length	1s – 5 min (300s)
Max file size	4 GB
File formats	MP4, MOV
Captioning	Captions strongly recommended; Threads autoplay defaults muted (matches Instagram Feed behavior).
Safe zone	Same chrome overlap as Image Ad — top ~60 px + bottom ~50 px clear.
Audio rules	Meta Sound Collection (commercial-cleared) or self-licensed.
Headline	40 chars max
Body / primary text	500 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Sponsored label.

Carousel Ad

Aspect ratios	1:1, 4:5
Resolution	1080×1080 or 1080×1350; up to 10 cards
Length	0s – 5 min (300s)
Max file size	4 GB
File formats	MP4, MOV, JPG, PNG
Captioning	Mixed-ratio cards technically supported, but Meta recommends uniform ratio across all cards for consistency.
Safe zone	Per-card chrome match Image Ad.
Audio rules	Same as Video.
Headline	40 chars max
Body / primary text	500 chars max
CTA	Fixed list (Shop Now, Learn More, etc.)
Disclosure	Sponsored label.

Source: TechCrunch — Threads rolls out ads to all users worldwide (Jan 2026).

Cross-platform takeaways

—9:16 is the universal floor. Every short-form-video surface (TikTok, Reels, Shorts, Snapchat, Pinterest Idea Pin, X Vertical Video, Threads Video) accepts 1080×1920. Cutting one 9:16 master and cropping down to 1:1 or 4:5 for Feed surfaces is faster than the reverse.
—Captions are mandatory in 2026. Every platform here recommends or requires them; sound-off prevalence ranges from ~25% (Shorts) to ~85% (TikTok) but no platform is sound-on-by-default for the entire feed. The exception worth knowing: X Vertical Video Ads in the Immersive Media Viewer autoplay sound-on.
—Audio licensing splits cleanly. TikTok, Meta, YouTube, and Snapchat each maintain a commercial-cleared library separate from their consumer library; using a trending UGC sound on a paid placement is a hard reject. Pinterest, Reddit, LinkedIn, and X have no platform-provided library — bring your own license.
—AIGC labels are now table stakes. TikTok, Meta (across Instagram/Facebook/Threads), and YouTube each require advertisers to flag AI-generated voice, face, or core performance. FTC guidance from late 2024 (refined 2026) makes "ad" alone insufficient when AI was used — disclose both.
—Two outliers worth flagging. LinkedIn caps video at 200 MB (vs 1+ GB everywhere else), forcing tighter encoding. Reddit Free-Form Ads have a 40,000-character body — order-of-magnitude longer than any other primary-text limit on this page.

Aspect ratios	1.5:1
Resolution	Banner 300×250 px; in-message CTA buttons
Length	Image / static only
Max file size	5 MB
File formats	JPG, PNG, GIF
Captioning	Plain-text message body; branching CTA flow with up to 5 buttons per node.
Safe zone	Renders inside LinkedIn Messaging; sender chrome occupies top ~80 px.
Audio rules	Text/image only.
Headline	60 chars max
Body / primary text	1500 chars max
CTA	25 chars max
Disclosure	Sponsored label in message header; user opt-out controls auto-included.

How to read this page

TikTok

In-Feed Ad (Auction)

Spark Ad

TopView

Branded Hashtag Challenge

Instagram

Reels Ad

Feed Video / Image

Stories Ad

Carousel

Facebook

Reels Ad

Feed Video / Image

Stories Ad

Carousel

Marketplace Ad

Right Column

YouTube

Shorts Ad (via Demand Gen)

In-Stream Skippable

In-Stream Non-Skippable

Bumper Ad

Demand Gen Campaign

Masthead

Snapchat

Snap Ad (Single Video)

Story Ad

Collection Ad

AR Lens

Commercial (Non-Skippable)

Pinterest

Standard Pin (Image Ad)

Video Pin (≤30s)

Video Pin (30s–60s)

Idea Pin

Carousel Pin

Shopping Pin (Product)

Reddit

Image Ad

Video Ad

Carousel Ad

Conversation Placement

Free-Form Ad

LinkedIn

Single Image Ad

Video Ad

Document Ad

Carousel Ad

Event Ad

Sponsored Messaging (Conversation Ad)

X (Twitter)

Promoted Image

Promoted Video

Carousel Ad

Vertical Video Ad (Immersive Media Viewer)

Threads

Image Ad

Video Ad

Carousel Ad

Cross-platform takeaways

How to read this page

TikTok

In-Feed Ad (Auction)

Spark Ad

TopView

Branded Hashtag Challenge

Instagram

Reels Ad

Feed Video / Image

Stories Ad

Carousel

Facebook

Reels Ad

Feed Video / Image

Stories Ad

Carousel

Marketplace Ad

Right Column

YouTube