Video upload specs by platform (September 2026)
Taken from each platform's own help centre or developer docs. "API" means the limit applies to uploads through the platform's publishing API, which is what schedulers use; the app is often more generous. "Not published" means we could not find an official number.
| Platform | Aspect ratio | Resolution | Length | File size | Frame rate | Format and codec | Audio |
|---|---|---|---|---|---|---|---|
| Instagram Reels | 9:16 recommended; 1.91:1 to 9:16 accepted | At least 720 px; API max 1920 px wide | Up to 20 min in the app; over 3 min not shown to new audiences; API 3 s to 15 min | No app limit published; API 300 MB | At least 30 fps (help centre); API 23 to 60 | MP4 or MOV, H.264 or HEVC, 4:2:0 | AAC, up to 48 kHz, mono or stereo |
| Instagram feed video | 1.91:1 to 4:5 in the feed | Same as Reels: at least 720 px | Not published for feed or carousel videos; single videos follow the Reels limits | Not published; API 300 MB | 23 to 60 fps (API) | MP4 or MOV, H.264 or HEVC | AAC, up to 48 kHz, mono or stereo |
| TikTok | Any; 9:16 fills the screen | 720x1280 or higher (web upload); API 360 to 4096 px per side | Up to 30 min (web upload) | Under 10 GB (web); API 4 GB | 23 to 60 fps (API) | MP4 or WebM (web); API also MOV. H.264, H.265, VP8, VP9 | Not specified |
| YouTube Shorts | Square or vertical (9:16 fills the screen) | No minimum published | Up to 3 min | 256 GB (all uploads) | As recorded; 24, 25, 30, 48, 50, 60 common | MP4 recommended; MOV, WebM, AVI and more accepted | AAC-LC or Opus, 48 kHz recommended |
| YouTube (long-form) | 16:9 standard; the player adapts to others | No minimum published; bitrate targets from 360p to 8K | 15 min by default; up to 12 h when verified | 256 GB | As recorded; 24, 25, 30, 48, 50, 60 common | MP4 (H.264, moov at front) recommended; MOV, WebM, ProRes and more accepted | AAC-LC or Opus, 48 kHz recommended |
| 1:2.4 to 2.4:1 | 256x144 to 4096x2304 | 3 s to 15 min (2 s on mobile); Pages 10 min | 75 KB to 5 GB | 10 to 60 fps | MP4, MOV, WebM, MKV, AVI, WMV; H.264, VP8, VP9 | AAC, MP3 or Vorbis (Pages list) | |
| X (Twitter) | 1:3 to 3:1 (API); 16:9 and 1:1 recommended | Up to 1920x1080 (Premium help); 1280x720 recommended | 140 s free; about 3 h with Premium | 512 MB free; 8 GB with Premium | 60 fps or less | MP4 or MOV, H.264 High Profile, 4:2:0 | AAC-LC, mono or stereo |
| Facebook Reels | 9:16 recommended | 1080x1920 recommended; API minimum 540x960 | No limit in the app; Page API 3 to 90 s | Not published | 24 to 60 fps | MP4 recommended; H.264, H.265, VP9, AV1 | AAC-LC, 48 kHz, stereo, 128 kbps+ |
Sources (checked September 2026)
Instagram Reels
- help.instagram.com/1038071743007909 (ratio, 30 fps, 720 px)
- help.instagram.com/2720958398006062 (20 min, 3 min recommendation)
- developers.facebook.com/docs/instagram-platform/instagram-graph-api/reference/ig-user/media/ (API encoding, size and length limits)
Instagram feed video
- facebook.com/business/m/one-sheeters/video-requirements (Instagram Feed 1.91:1 to 4:5)
- help.instagram.com/269314186824048 (one frame shape per carousel)
- about.fb.com/news/2022/07/new-ways-to-create-instagram-reels-remix/ (new video posts are shared as reels)
- developers.facebook.com/docs/instagram-platform/instagram-graph-api/reference/ig-user/media/ (API encoding limits)
TikTok
- support.tiktok.com/en/using-tiktok/creating-videos/creator-tools-on-tiktok (web upload: MP4/WebM, 720x1280, 30 min, 10 GB)
- developers.tiktok.com/doc/content-posting-api-media-transfer-guide (API codecs, 23 to 60 fps, 360 to 4096 px, 4 GB)
YouTube Shorts
- support.google.com/youtube/answer/15424877 (Shorts: square or vertical, up to 3 min)
- support.google.com/youtube/answer/1722171 (recommended encoding settings)
- support.google.com/youtube/troubleshooter/2888402 (accepted formats)
YouTube (long-form)
- support.google.com/youtube/answer/71673 (15 min default, 12 h / 256 GB verified)
- support.google.com/youtube/answer/1722171 (recommended encoding settings and bitrates)
- support.google.com/youtube/answer/15424877 (square or vertical up to 3 min becomes a Short)
LinkedIn
- linkedin.com/help/linkedin/answer/a548372 (member video specs)
- linkedin.com/help/linkedin/answer/a1311816 (Pages: 10 min, codec list)
X (Twitter)
- help.x.com/en/using-x/premium-longer-videos (140 s / 512 MB free, 3 h / 8 GB Premium, 1920x1080)
- docs.x.com/x-api/media/quickstart/best-practices (codec, fps, ratio, audio, bitrate)
Facebook Reels
- about.fb.com/news/2025/06/making-it-easier-create-videos-facebook/ (all videos are reels, no length limits)
- developers.facebook.com/docs/video-api/guides/reels-publishing/ (Reels publishing specs)
More free social media tools
Same quality bar. Still free. Still no upload.
Part of free Instagram tools, free TikTok tools, free YouTube tools, free LinkedIn tools and free X tools.
Your files never leave your device
Free to use, with no account, no usage limit and no watermark, because the work runs on your device rather than on our servers.
This is not a promise about how carefully we handle your upload. There is no upload. The file you choose is read into memory by your own browser, processed there, and handed back as a download — the tool has no server component and makes no network request with your data.
- Nothing is stored. We never receive the file, so there is no copy to retain, no retention period to disclose, and nothing to delete on request.
- Nothing is transmitted. No upload endpoint, no analytics payload carrying file contents, no third-party processor.
- You can verify it. Load this page, disconnect from the internet, and use the tool. It still works, because everything it needs is already on your machine.
- Nothing persists after you close the tab. Files are held in page memory only — not in local storage, not in a cache, not in a database.
A note on wording, because it matters: we do not describe these tools as “encrypted.” Encryption protects data that travels to somebody else's computer. Your file does not travel, so there is nothing to encrypt and nothing to intercept — which is a stronger guarantee than encryption, not a weaker one. The page itself is served over HTTPS like the rest of the site.
This makes the tools safe for material you are contractually barred from uploading to third-party services — client footage under NDA, unreleased campaign assets, anything covered by a confidentiality clause.
How it works
1. Drop a video
MP4, MOV, WebM or MKV up to 2 GB. Only the header boxes are read (usually a few hundred kilobytes), so even a long file takes a second. Nothing is uploaded.
2. Read the real specs
The tool parses the MP4 or WebM structure for codec, profile, frame rate, bitrate, audio format and whether the index sits at the front. If a WebM does not state its frame rate, it measures one second of playback instead and says so.
3. Check eight platforms
Each platform's published limits are applied: ratio, resolution, length, file size, format, codec, frame rate, bitrate and audio. Fail means a documented upload limit is broken; warning means a recommendation or an API-only limit that schedulers hit.
4. Fix it free
Wrong shape, too long or too big? Each problem links to the free resizer, auto reframe, trimmer or compressor. Codec and audio problems are best fixed by re-exporting from your editor as MP4 with H.264 and AAC.
Questions
What size and frame rate should an Instagram Reel be?
Instagram's help centre recommends 9:16 (1080 x 1920), accepts shapes from 1.91:1 to 9:16, and asks for at least 720 pixels and at least 30 fps. Reels can be up to 20 minutes in the app, but Instagram says reels over 3 minutes are not recommended to new audiences. Meta's publishing API, which schedulers use, is stricter: 23 to 60 fps, 3 seconds to 15 minutes, 300 MB, H.264 or HEVC in MP4 or MOV, AAC audio up to 48 kHz.
What are TikTok's and LinkedIn's video limits?
TikTok's web uploader takes MP4 or WebM at 720 x 1280 or higher, up to 30 minutes and under 10 GB; its API accepts 23 to 60 fps and H.264, H.265, VP8 or VP9. LinkedIn member posts take 3 seconds to 15 minutes (Company Pages 10 minutes), 75 KB to 5 GB, ratios from 1:2.4 to 2.4:1, 256 x 144 to 4096 x 2304, 10 to 60 fps and 192 kbps to 30 Mbps.
What is the difference between a fail and a warning?
A fail breaks a limit the platform documents for normal app or web uploads, such as a landscape video for Shorts or a 20 minute clip for LinkedIn. A warning means the file is outside a recommendation, or outside a limit the platform documents only for API uploads, which is what schedulers such as Buffer or Later use. A warning often still uploads from the app, and a pass is not a promise: every platform re-encodes and can change its rules.
How does it read codec and frame rate without uploading my video?
Browsers do not expose codec or frame rate, so the tool reads the file itself on your device. For MP4 and MOV it finds the moov box and reads the track headers, sample description (avcC, hvcC, esds), sample timings and sizes. For WebM and MKV it reads the EBML track headers. Nothing leaves your browser; there is no server step.
Where do the numbers come from?
From each platform's own help centre or developer documentation, checked in September 2026 and linked under the spec table. Where a platform publishes nothing (TikTok's audio spec, Facebook's reel file size, a minimum resolution for Shorts), the table says not published instead of borrowing a figure. TikTok's help pages could not be fetched directly, so their wording was confirmed through the pages' search listings.
Why does it say it could not read the frame rate?
Fragmented MP4s (what browsers and some screen recorders write) and many WebM files do not store a frame rate in the header. The tool then plays one second, muted, and measures the gap between frames; that reading is labelled measured, and on a 60 Hz screen anything above 60 fps reads low. If playback is not possible in your browser, the row shows as not readable.
Related tools
Stay in the same job cluster. Free tools stay on-device; paid tools are labelled as such.
These rearrange files. Versely makes new ones.
Everything on this page works on a file you already have, which is why it costs nothing. Generating something that did not exist (video from a prompt, a voice, a score) runs a model, and that costs credits.