Spec library

Ad specs, with receipts.

The rules Gatecheck checks against, for 24 placements. Every rule links to where it came from. Platform pages are marked as primary; industry guides used where no platform page was reachable are marked secondary.

Last checked 28 September 2026

Ratio range	4:5 to 1.91:1, 1440×1800 recommended
Image formats	JPG, PNG
Image weight	up to 30 MB
Minimum width	600 px

Ratio range	9:16 to 16:9, 1440×1800 recommended
Video files	.mp4, .mov, .gif
Codec	H.264 recommended
Video weight	up to 4 GB
Length	from 1 s, up to 60 min
Audio	recommended

Ratios	9:16 (1440×2560 recommended), min 250×444
Video files	.mp4, .mov
Codec	H.264 recommended
Video weight	up to 4 GB
Length	up to 15 min
Audio	recommended
Safe zone	top 14%, bottom 35%, sides 6% (official)

Ratios	9:16 (1440×2560 recommended), min 250×444
Image formats	JPG, PNG
Image weight	up to 30 MB
Minimum width	500 px
Video files	.mp4, .mov, .gif
Codec	H.264 recommended
Video weight	up to 4 GB
Length	from 1 s, up to 60 min
Audio	recommended
Safe zone	top 14%, bottom 35%, sides 6% (official)

TikTok

In-Feed

TikTok auction In-Feed video (non-Spark)

Ratios	9:16 (1080×1920 recommended), min 540×960; 16:9, min 960×540; 1:1, min 640×640
Video files	.mp4, .mov, .mpeg, .mpg, .3gp, .avi
Codec	H.264 recommended
Video weight	up to 500 MB
Length	up to 10 min
Bitrate	at least 516 kbps
Audio	recommended
Safe zone	top 6.8%, bottom 25.2%, sides 4.1% and 13% (guide)

Source: TikTok Ads Manager: Auction In-Feed Ads; Cadenus: TikTok safe zone in pixelssecondary

YouTube

Skippable in-stream

YouTube skippable in-stream video ads

Ratios	16:9 (1920×1080 recommended), min 1280×720; 9:16 (1080×1920 recommended), min 720×1280; 1:1 (1080×1080 recommended), min 480×480
Video files	.mp4, .mov, .webm, .avi, .wmv, .mpg, .mpeg, .3gp, .flv, .m4v, .mkv
Video weight	up to 256 GB
Length	3 min or less recommended
Audio	recommended

No maximum length; under 3 minutes is recommended.
The video is uploaded to YouTube first, then used in Google Ads.

Source: Google Ads Help: YouTube video ad specs; Google Ads Help: video ad formats

Bumper (6 s)

YouTube non-skippable bumper, 6 seconds or shorter

Ratios	16:9 (1920×1080 recommended), min 1280×720; 9:16 (1080×1920 recommended), min 720×1280; 1:1 (1080×1080 recommended), min 480×480
Video files	.mp4, .mov, .webm, .avi, .wmv, .mpg, .mpeg, .3gp, .m4v
Video weight	up to 256 GB
Length	up to 6 s
Audio	recommended

Source: Google Ads Help: video ad formats; Google Ads Help: YouTube video ad specs

Non-skippable (15 s)

YouTube non-skippable in-stream

Ratios	16:9 (1920×1080 recommended), min 1280×720; 9:16 (1080×1920 recommended), min 720×1280; 1:1 (1080×1080 recommended), min 480×480
Video files	.mp4, .mov, .webm, .avi, .wmv, .mpg, .mpeg, .3gp, .m4v
Video weight	up to 256 GB
Length	up to 1 min, 15 s or less recommended
Audio	recommended

Standard non-skippable is 15 seconds. Some campaign subtypes (such as TV screens) allow up to 60 seconds.

Source: Google Ads Help: video ad formats

Shorts

YouTube Shorts ads, vertical

Ratios	9:16 (1080×1920 recommended), min 720×1280
Video files	.mp4, .mov, .webm, .avi, .wmv, .mpg, .mpeg, .3gp, .m4v
Video weight	up to 256 GB
Length	1 min or less recommended
Audio	recommended
Safe zone	top 10%, bottom 25%, sides 4% and 12% (guide)

Source: Google Ads Help: video ad formats; Google Ads Help: YouTube video ad specs; Kreatli: Safe zone hubsecondary

Google Ads

Display image

Uploaded image ads on the Google Display Network

Sizes	200×200, 240×400, 250×250, 250×360, 300×250, 336×280, 580×400, 120×600, 160×600, 300×600, 300×1050, 468×60, 728×90, 930×180, 970×90, 970×250, 980×120, 300×50, 320×50, 320×100
Image formats	GIF, JPG, PNG
Image weight	up to 150 KB
Animation	stops within 30 s, slower than 5 fps

Animated GIFs may loop but must stop within 30 seconds and run slower than 5 frames per second.

Source: Google Ads Help: uploaded display ad specs

HTML5

HTML5 display ads uploaded to Google Ads

Sizes	200×200, 240×400, 250×250, 250×360, 300×250, 336×280, 580×400, 120×600, 160×600, 300×600, 300×1050, 468×60, 728×90, 930×180, 970×90, 970×250, 980×120, 300×50, 320×50, 320×100
Zip weight	up to 600 KB
Files in zip	up to 40
Allowed types	html, htm, css, js, gif, png, jpg, jpeg, svg
Click-through	clickTag or Google Web Designer exit
ad.size meta	required

The limit is 600 KB, not the 150 KB many guides still quote (150 KB applies to image ads).
HTML5 upload is only available to eligible Google Ads accounts.
Animation must stop within 30 seconds.

Source: Google Ads Help: uploaded display ad specs

Responsive / PMax image

Image assets for Performance Max, Demand Gen and responsive display

Ratios	1.91:1 (1200×628 recommended), min 600×314; 1:1 (1200×1200 recommended), min 300×300; 4:5 (960×1200 recommended), min 480×600
Image formats	JPG, PNG
Image weight	up to 5,120 KB

Google recommends at least 3 landscape, 3 square and 1 portrait image per asset group.

Source: Performance Max ad specs (AdNabu guide)secondary

Campaign Manager 360

HTML5

HTML5 display creatives trafficked in CM360

Zip weight	up to 10 MB
Files in zip	up to 100
Allowed types	html, htm, js, css, jpg, jpeg, gif, png, json, xml, svg, eot, otf, ttf, woff, woff2
Click-through	clickTag variable
ad.size meta	required

Upload the backup image separately in CM360, not inside the zip.

Source: Campaign Manager 360 Help: prepare HTML5 assets

Display & Video 360

HTML5

HTML5 creatives uploaded to DV360

Files in zip	up to 100
Allowed types	html, htm, css, js, jpg, jpeg, gif, png, svg, dfont, eot, otf, ttf, woff, woff2
Click-through	clickTag variable
ad.size meta	required

Source: Display & Video 360 Help: HTML5 creatives

IAB standard

Display banners

IAB standard sizes for publisher direct deals

Sizes	300×250, 728×90, 160×600, 300×600, 320×50, 320×100, 970×250, 970×90, 300×1050, 468×60, 336×280, 120×600
Image formats	GIF, JPG, PNG
Image weight	up to 150 KB
Animation	stops within 15 s, 3 loops at most
Initial load	up to 150 KB
Files in zip	up to 100
Allowed types	html, htm, css, js, gif, png, jpg, jpeg, svg, json, woff, woff2, ttf, otf
Click-through	clickTag variable

Initial load up to 150 KB, subload up to 2 MB, animation up to 15 seconds.
Publishers often add their own limits (for example 3 loops); check their spec sheet or add it as a custom spec.

Source: IAB New Standard Ad Unit Portfolio; SizeIM: creative trafficking checklistsecondary

Single image

LinkedIn Sponsored Content single image

Ratios	1.91:1 (1200×628 recommended); 1:1 (1200×1200 recommended); 4:5 (720×900 recommended)
Image formats	JPG, PNG, GIF
Image weight	up to 5 MB

4:5 vertical images show on mobile only.

Source: LinkedIn ad specs guide (Rocketium)secondary

Video

LinkedIn video ads

Ratios	16:9 (1920×1080 recommended), min 640×360, max 1920×1080; 1:1, min 360×360, max 1920×1920; 4:5, min 360×450, max 1080×1350; 9:16, min 360×640, max 1080×1920
Video files	.mp4
Codecs	H.264, VP8
Video weight	up to 500 MB
Length	from 3 s, up to 30 min, 30 s or less recommended
Frame rate	30 fps or lower
Audio	recommended

15 to 30 seconds qualifies for every placement. In-stream placements take up to 90 seconds.

Source: LinkedIn Help: video ads specifications

Snapchat

Single image or video

Snapchat full-screen image or video ad

Ratios	9:16 (1080×1920 recommended), min 1080×1920
Image formats	JPG, PNG
Image weight	up to 5 MB
Video files	.mp4, .mov
Codec	H.264 recommended
Video weight	up to 1 GB
Length	from 3 s, up to 3 min
Audio	required
Loudness	-16 LUFS ±2, true peak -1 dBTP (Snap target)
Safe zone	top 7.8%, bottom 7.8% (guide)

Snap asks for balanced stereo audio targeting about -16 LUFS.

Source: Snapchat ad specs (Strike Social guide)secondary; Snapchat for Business: ad formats

X

Video

X (Twitter) promoted video

Ratios	16:9 (1920×1080 recommended); 1:1 (1200×1200 recommended); 9:16 (1080×1920 recommended)
Video files	.mp4, .mov
Codec	H.264 recommended
Video weight	up to 1 GB
Length	up to 2.33 min, 30 s or less recommended
Audio	recommended

Source: X ad specs (Benly guide)secondary

Image

X (Twitter) promoted image

Ratios	1:1 (1200×1200 recommended); 1.91:1 (1200×628 recommended)
Image formats	JPG, PNG
Image weight	up to 5 MB

Source: X ad specs (Benly guide)secondary

Standard image

Pinterest standard image ad

Ratios	2:3 (1000×1500 recommended); 1:1 (1000×1000 recommended)
Image formats	JPG, PNG
Image weight	up to 20 MB

Pins taller than 2:3 may be cut off in feed.

Source: Pinterest Business Help: product specs; Pinterest ad specs (Strike Social guide)secondary

Standard video

Pinterest standard video ad

Ratios	1:1; 2:3; 4:5; 9:16
Video files	.mp4, .mov, .m4v
Codecs	H.264, HEVC
Video weight	up to 2 GB
Length	from 4 s, up to 15 min
Audio	optional

Source: Pinterest Business Help: product specs; Pinterest ad specs (Strike Social guide)secondary

Connected TV

CTV spot (US)

Streaming TV ads served to US households

Ratios	16:9 (1920×1080 recommended), min 1920×1080
Video files	.mp4, .mov
Video weight	up to 10 GB
Length	exactly 6, 15, 30, 60 s
Frame rate	23.976, 24, 25, 29.97, 30 fps
Audio	required
Loudness	-24 LUFS ±2, true peak -2 dBTP (ATSC A/85 (CALM Act, California SB 576))

From 1 July 2026, California SB 576 requires streaming ads to match the loudness of surrounding content.
Publishers often want a high-bitrate mezzanine file (15 Mbps or more); confirm with the buyer.

Source: Advalidation: CTV loudness, SB 576 and CALM Actsecondary; Tinuiti: CTV specs and ad format guidelinessecondary

TV broadcast

HD spot (EBU R128, 25 fps)

TV commercials for PAL-region channels (Pakistan, Gulf, Europe)

Ratios	16:9, min 1920×1080, max 1920×1080
Video files	.mov, .mxf, .mp4
Video weight	up to 50 GB
Frame rate	25, 50 fps
Audio	required
Loudness	-23 LUFS ±1, true peak -1 dBTP (EBU R128)

Channels differ on codec (ProRes, XDCAM or high-bitrate H.264), slates and interlacing. Add the channel’s own sheet as a custom spec when you have it.

Source: EBU R 128: loudness normalisation

Check your files against these specs.

Drop a campaign into the checker. Nothing is uploaded.

Open the checker

Ad specs, with receipts.

Meta

Feed image

Feed video

Reels

Stories

TikTok

In-Feed

YouTube

Skippable in-stream

Bumper (6 s)

Non-skippable (15 s)

Shorts

Google Ads

Display image

HTML5

Responsive / PMax image

Campaign Manager 360

HTML5

Display & Video 360

HTML5

IAB standard

Display banners

LinkedIn

Single image

Video

Snapchat

Single image or video

X

Video

Image

Pinterest

Standard image

Standard video

Connected TV

CTV spot (US)

TV broadcast

HD spot (EBU R128, 25 fps)