LinkedIn reference
LinkedIn Video Specifications: File Size, Length and Format
LinkedIn video specifications depend on where you post. A regular post takes 75 KB to 5 GB, a 1:2.4 to 2.4:1 aspect ratio and 256x144 to 4096x2304 resolution. Postdom makes ready-to-post videos from your website and posts the ones you approve to LinkedIn, so you don't have to export to spec yourself.
LinkedIn video specifications at a glance
For a video shared from LinkedIn on desktop or mobile, use this table. Pages, the Videos API and ads have their own rows below.
| Requirement | LinkedIn publishes | Practical export choice |
|---|---|---|
| File size | 75 KB to 5 GB | Stay well below the maximum so uploads and processing finish reliably. |
| Length | Up to 15 minutes; minimum 3 seconds on desktop or 2 seconds in the mobile app | Front-load the point; the allowed maximum is not an engagement recommendation. |
| Resolution | 256x144 to 4096x2304 | Export at the native size of your chosen aspect ratio; do not upscale a small source. |
| Aspect ratio | 1:2.4 to 2.4:1 | Use 16:9, 1:1, 4:5 or 9:16 when you want a familiar feed layout. |
| Frame rate | 10 to 60 FPS | Keep the source frame rate, usually 24, 25 or 30 FPS. |
| Bit rate | 192 Kbps to 30 Mbps | Use enough bitrate to avoid visible blocking without inflating the file. |
| Format | Several containers are accepted by the sharing help page. | MP4 with H.264 video and AAC audio is the compatibility-first choice. |
Source: LinkedIn’s video sharing troubleshooting page, checked . LinkedIn uses decimal-looking labels such as “5 GB” but does not define the byte convention on the help page.
Free LinkedIn video specifications checker
Not sure your file fits? Postdom's free video spec checker compares the file you plan to publish with the platform facts Postdom has recorded.
LinkedIn video size
A regular post allows 75 KB to 5 GB. Pages allow 75 KB to 5 GB. Video ads allow 75 KB to 500 MB.
Postdom's own upload ceiling is 500 MiB, so it can stop a file before it reaches LinkedIn even when LinkedIn would take a larger one.
| Surface | What it governs | File size | Duration | Checked |
|---|---|---|---|---|
| Regular video sharing | Regular video shared from desktop or the LinkedIn mobile app | 75 KB to 5 GB | Up to 15 minutes; minimum 3 seconds on desktop or 2 seconds in the mobile app | |
| Pages and Career Pages | Video published to a LinkedIn Page or Career Page | 75 KB to 5 GB | 3 seconds to 10 minutes | |
| Videos API | Uploads owned by a person or an organization; the page also supports ads use cases | 500 MB in the high-level block; 5 GB on fileSizeBytes | 3 to 30 minutes in the high-level block; no separate organic/feed ceiling in the schema | |
| Video ads | Sponsored Content video ads | 75 KB to 500 MB | 3 seconds to 30 minutes |
LinkedIn video length
Regular posts: Up to 15 minutes; minimum 3 seconds on desktop or 2 seconds in the mobile app. Pages: 3 seconds to 10 minutes. Video ads: 3 seconds to 30 minutes.
The maximum is a limit, not a target. Put the point in the opening seconds.
Why the Videos API shows two size limits
LinkedIn's Videos API page states two maximums that it never reconciles:
A high-level sizing block
It says non-connected-television video is 3 seconds to 30 minutes, 75 KB to 500 MB and MP4. The block links to Connected TV Ads for the alternate case and points readers to the Video Ads Advertising Specifications.
The upload-request schema
The required
initializeUploadRequest.fileSizeBytesfield says the maximum allowed video size is 5 GB. The owner field can be a person or an organization, and the page describes both organic and advertising permissions.
If you build against the API yourself, treat the smaller figure as the safe ceiling until you have tested your route. Read the LinkedIn API explainer.
LinkedIn video export checklist
- Container: MP4, with H.264 video and AAC audio.
- Keep the source frame rate.
- Keep text and logos away from the edges.
- Add captions so the video works without sound.
- Check the file matches where you will post: regular post, Page, API or ad.
These are practical defaults, not extra LinkedIn rules.
Formats listed for regular sharing
MP4, MOV, AVI, WEBM, MKV, WMV, VC1, MPEG, MPEG2, MPEG1VIDEO, DVVIDEO, QTRLE, TSCC2.
LinkedIn warns that a container may upload yet still fail processing; MP4 remains the compatibility-first choice.
Formats listed for Pages
AAC, ASF, FLV, MP3, MP4, MPEG-1, MPEG-4, MKV, WebM, H264/AVC, Vorbis, VP8, VP9, WMV2, WMV3.
The Pages article separately says AVI, QuickTime and MOV are no longer supported.
Video-ad ratios and dimensions
- 16:9 landscape: 640x360 to 1920x1080; recommended 1920x1080 or 1200x675.
- 1:1 square: 360x360 to 1920x1920; recommended No single size stated.
- 4:5 vertical: 360x450 to 1080x1350; recommended 720x900.
- 9:16 vertical: 360x640 to 1080x1920; recommended 720x1280.
| Fact | Recorded value | Postdom treatment | Evidence |
|---|---|---|---|
| Container format | video/mp4Enforced by Postdom | The only LinkedIn video fact Postdom enforces, and the narrowing is Postdom's own. LinkedIn's Pages page lists around fifteen accepted formats and withdraws three, saying “We no longer support AVI, QuickTime, or MOV files.” Postdom sends MP4 alone — narrower than LinkedIn requires, which can only reduce what reaches it, and that is why it is safe to enforce where a maximum from the same prose would not be. | Source · |
| Maximum file size for the upload | 5 GBRecorded, not enforced | The Videos API schema states 5 GB on initializeUploadRequest.fileSizeBytes. The same API page also carries a high-level 500 MB block, so this row names the precise field it comes from instead of pretending the document has one unambiguous maximum. Postdom records the schema value rather than enforcing it because Postdom's own ceiling rejects first. | Source · |
| Separate API duration ceiling | Not publishedNot separately stated | The reviewed Videos API schema does not separately state a duration maximum for an organic or feed upload. That narrower finding does not erase the 15-minute maximum on LinkedIn's general sharing help page or the 3-to-30-minute high-level block on the API page. Postdom therefore does not enforce a LinkedIn-specific duration gate. | Source · |
| Smallest frame | 256x144Recorded, not enforced | LinkedIn's general sharing and Pages help articles publish the range as 256x144 to 4096x2304. They do not explain how those endpoint pairs are evaluated after orientation changes, so this page does not infer that every reversed portrait pair is accepted. | Source · |
| Largest frame | 4096x2304Recorded, not enforced | From LinkedIn's general video-sharing help article, which carries no version and a relative last-updated label. It is useful planning guidance, but Postdom does not reject a file from this value alone. | Source · |
| Aspect ratio range | 1:2.4 to 2.4:1Recorded, not enforced | The general sharing and Pages articles publish 1:2.4 to 2.4:1. Video ads instead list named ratios with per-ratio pixel ranges, so the intended publishing surface matters. | Source · |
Why a LinkedIn video can still fail
File limits are only the first check. A codec problem, a damaged file, an odd audio track, account permissions or a processing error can still stop a video.
Re-export as MP4
Use H.264 video and AAC audio. Do not only rename the file extension; that does not change the codecs inside the container.
Try the native LinkedIn composer
If the same file fails there, the issue is not your scheduler. If it succeeds natively, re-check the connection, account permissions and destination selected in your publishing workflow.
Reduce complexity
Shorten the video, reduce resolution or bitrate and remove unusual audio tracks. This is diagnostic—not a claim that LinkedIn’s published maximum changed.
Wait for processing
An API upload can be accepted before the asset becomes available. Treat upload completion and processing completion as separate states.
LinkedIn video specifications FAQ
What are the LinkedIn video specifications for a regular post?
75 KB to 5 GB, Up to 15 minutes; minimum 3 seconds on desktop or 2 seconds in the mobile app, 256x144 to 4096x2304 resolution, a 1:2.4 to 2.4:1 aspect ratio, 10 to 60 FPS and 192 Kbps to 30 Mbps.
What is the maximum LinkedIn video file size?
For regular posts, 75 KB to 5 GB. Pages: 75 KB to 5 GB. The Videos API: 500 MB in the high-level block; 5 GB on fileSizeBytes. Check the surface you will actually use.
How long can a LinkedIn video be?
Regular posts: Up to 15 minutes; minimum 3 seconds on desktop or 2 seconds in the mobile app. Pages: 3 seconds to 10 minutes. Video ads: 3 seconds to 30 minutes.
What is the best video format for LinkedIn?
MP4 with H.264 video and AAC audio works across every LinkedIn surface. It is also the format Postdom sends.
Can Postdom post videos to LinkedIn for me?
Yes. Postdom turns your website into ready-to-post videos in your brand and posts the ones you approve to LinkedIn, on Free or any paid plan. Nothing posts until you approve it.
Post LinkedIn videos with Postdom
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