Ijharul Islam
LinkedIn video ad specs, as of October 2026: an MP4 file of 75 KB to 500 MB, 3 seconds to 30 minutes long, in 16:9, 1:1, 4:5 or 9:16, at under 30 frames per second, with AAC or MPEG-4 audio. LinkedIn recommends 15 to 30 seconds so the ad qualifies for all Feed and Audience Network placements; anything wider than 16:9 is rejected.
These are stricter than the limits for ordinary video posts (up to 15 minutes and 5 GB), so a video that posts fine may still fail as an ad. Every figure below was read on LinkedIn's own help pages on 27 October 2026. For organic posts, see LinkedIn video size and specs; for every other platform, our video specs by platform.
The short answer
LinkedIn video ads: MP4 only (H.264 or VP8 video, no ProRes), 75 KB to 500 MB, 3 seconds to 30 minutes (15-30 s recommended), under 30 fps, AAC or MPEG-4 audio. Sizes: 16:9 at 1920×1080 (or 1200×675), 1:1 up to 1920×1920, 4:5 at 720×900 (up to 1080×1350), 9:16 at 720×1280 (up to 1080×1920). Captions as SRT; optional JPG or PNG thumbnail up to 2 MB.
Key takeaways
- MP4 only, 500 MB maximum and under 30 fps: three limits that catch videos which post fine organically.
- 15 to 30 seconds is LinkedIn's recommended length to run in every Feed and Audience Network placement.
- Vertical 9:16 and 4:5 are supported; anything wider than 16:9 is rejected.
- Upload captions as an SRT file; burned-in captions also help, since many people watch muted.
- Introductory text truncates at 150 characters and headlines at 70, so lead with the point.
LinkedIn video ad specs at a glance
| Spec | LinkedIn video ads (October 2026) |
|---|---|
| File format | MP4 only |
| Video codec | H.264 or VP8 (Apple ProRes not supported) |
| File size | 75 KB to 500 MB |
| Length | 3 seconds to 30 minutes; 15-30 seconds recommended for all Feed and Audience Network placements |
| Frame rate | Less than 30 fps |
| Audio | AAC or MPEG-4, less than 64 kHz |
| Aspect ratios | 16:9, 1:1, 4:5, 9:16; wider than 16:9 is rejected |
| Captions | SRT file, text only, no custom styling |
| Thumbnail (optional) | JPG or PNG, up to 2 MB, same aspect ratio and resolution as the video |
LinkedIn also notes that videos shorter than 30 seconds loop until they reach 30 seconds of playback, and that in-stream video ads can run up to 90 seconds.
LinkedIn video ad sizes in pixels
| Aspect ratio | Recommended | Minimum | Maximum |
|---|---|---|---|
| 16:9 (landscape) | 1920×1080 or 1200×675 | 640×360 | 1920×1080 |
| 1:1 (square) | Not stated | 360×360 | 1920×1920 |
| 4:5 (vertical) | 720×900 | 360×450 | 1080×1350 |
| 9:16 (vertical) | 720×1280 | 360×640 | 1080×1920 |
Which shape to choose: vertical and square take up more of a phone screen in the feed, while 16:9 suits desktop viewers and footage shot for YouTube or a website. If you can only make one, square or 4:5 is a safe middle. QuickVeed's free video aspect ratio calculator works out the pixel size for any ratio, and the social media video size guide compares every platform.
Ad copy and other limits
| Field | Limit |
|---|---|
| Introductory text | Up to 3,000 characters; truncated after about 150 on many devices; up to 10 emojis |
| Headline | Up to 200 characters; truncated after about 70 |
| Ad name (internal) | Up to 255 characters |
| Destination URL | Up to 2,000 characters |
| Uploads | Upload the file directly (no YouTube or Vimeo links), from desktop, up to 25 uploads in 24 hours |
Write the introductory text so the first 150 characters work on their own: the problem or the offer, not your company name.
LinkedIn video ad specs vs organic video posts
| Video ads | Organic video posts | |
|---|---|---|
| Formats | MP4 only | MP4, MOV, AVI, WebM, MKV, WMV and more |
| File size | 75 KB to 500 MB | 75 KB to 5 GB |
| Length | 3 s to 30 min | 3 s to 15 min (2 s in the mobile app) |
| Frame rate | Under 30 fps | 10 to 60 fps |
| Aspect ratio | 16:9, 1:1, 4:5, 9:16 | 1:2.4 to 2.4:1 |
The frame rate is the one people miss. A 60 fps or 30 fps phone recording can be rejected as an ad; export at 25 or 24 fps, or follow the exact wording LinkedIn shows in Campaign Manager when you upload. The organic limits are covered in LinkedIn video size and specs.
Export checklist for a LinkedIn video ad
- Cut to 15-30 seconds unless you have a reason to run longer; trim with the free video trimmer.
- Pick 1:1, 4:5 or 9:16 for mobile-first campaigns, 16:9 for desktop-heavy audiences.
- Export H.264 MP4 at the recommended pixel size, at 24 or 25 fps, with AAC audio at 48 kHz or 44.1 kHz.
- Check the file is under 500 MB; a 30-second 1080p ad usually is. If not, use the free video compressor.
- Make an SRT caption file and burn captions in as well for muted viewers.
- Prepare a thumbnail at the same size as the video, under 2 MB.
- Put the offer in the first 3 seconds and the first 150 characters of text.
Making LinkedIn video ads with QuickVeed
QuickVeed is our product. It can supply most pieces of a short LinkedIn ad: auto subtitles transcribe the video and burn captions in (1.5 credits a minute to transcribe, 1 a minute to burn in, 3 at least) and export the SRT for LinkedIn's caption upload; the AI voice generator narrates a script; and AI avatars make a presenter clip of up to 30 seconds. It doesn't publish to LinkedIn or set frame rates for you, so export from your editor to the specs above. QuickVeed plans are $18 a month for 1,000 credits, $42 for 2,500 and $114 for 6,000, and a new account gets a 14-day trial with 250 credits, no card needed.
For a B2B content plan around these ads, read LinkedIn video marketing for B2B, and to add captions to an organic post, how to add subtitles to a LinkedIn video. Other platforms' ad rules: Facebook video ad specs, YouTube ad specs and TikTok ad specs.
Frequently asked questions
What size should a LinkedIn video ad be?
1920×1080 for 16:9, up to 1920×1920 for square, 720×900 (up to 1080×1350) for 4:5 and 720×1280 (up to 1080×1920) for 9:16. Files must be MP4, 75 KB to 500 MB.
How long can a LinkedIn video ad be?
3 seconds to 30 minutes. LinkedIn recommends 15 to 30 seconds so the ad qualifies for all Feed and Audience Network placements; in-stream ads can run up to 90 seconds.
Can LinkedIn video ads be vertical?
Yes. 9:16 and 4:5 are supported; videos wider than 16:9 are rejected.
What frame rate do LinkedIn video ads need?
Less than 30 frames per second, according to LinkedIn's ad specs. Export at 24 or 25 fps to be safe.
Do LinkedIn video ads support captions?
Yes, as an SRT file with plain text and no custom styling. Burned-in captions also work and stay visible everywhere.
Try it with your own video
Caption your LinkedIn ad and export the SRT with QuickVeed, then upload both in Campaign Manager. Upload a 30-second clip, burn in captions, and check how it reads muted. QuickVeed plans start at $18/month, and new accounts get a 14-day trial with 250 credits, no card needed. Sign up or see pricing.
Sources
Competitor details in this post were checked against these public pages in October 2026. Products and prices change, so confirm with each vendor before you decide.
