Free tool
Facebook Reel size and specs
Meta recommends 1080x1920 (9:16) for reels, and at least 540x960. Meta says reels on Facebook have no length restrictions, and every video posted to Facebook is shared as a reel. Facebook’s help pages list no current file size limit. Socialync takes files up to 4 GB. Formats: MP4 and MOV. Facebook sets no length limit. Socialync posts up to 3:00.
| Size and shape | 1080x1920 (9:16) recommendedEvery video posted to Facebook is shared as a reel, whatever its orientation. 1080x1920 recommended, 540x960 at the least, 24 to 60 frames per second. |
|---|---|
| Length | No limitMeta says reels on Facebook have no length restrictions, and every video posted to Facebook is shared as a reel. |
| File size | Not published |
| Formats | MP4, MOVFacebook recommends MP4 or MOV and accepts most other video files. |
| What Socialync posts | Up to 3:00, files up to 4 GBFacebook sets no length limit. Socialync posts up to 3:00. |
Platform numbers come from each platform's own help and developer pages, checked October 11, 2026. Socialync's numbers are the limits it checks before it publishes.
Check your video for Facebook Reels
Drop the file to see whether it fits Facebook Reels and every other platform you pick, with the fix for anything that fails. The check runs in your browser, so the video never leaves your device.
Frequently asked questions
What size is a Facebook Reel?
Meta recommends 1080x1920 (9:16) for reels, and at least 540x960. Every video posted to Facebook is shared as a reel, whatever its orientation.
How long can a Facebook Reel be?
Meta says reels on Facebook have no length restrictions, and every video posted to Facebook is shared as a reel. Facebook sets no length limit. Socialync posts up to 3:00.
What is the maximum file size for a Facebook Reel?
Facebook’s help pages list no current file size limit. Socialync takes files up to 4 GB.
What video formats does Facebook accept?
MP4, MOV. Facebook recommends MP4 or MOV and accepts most other video files.
Does the checker upload my video?
No. Your browser reads the file size, type, length and frame size on your device, and nothing is sent anywhere.
Video specs for every platform
| Platform | Size and shape | Length | File size | Formats | Socialync posts |
|---|---|---|---|---|---|
| Instagram Reels | 9:16 recommended, at least 720 pixels | 3 seconds to 15:00 | Up to 300 MB | MP4 and MOV | Up to 3:00, files up to 4 GB |
| TikTok | 360 to 4,096 pixels on each side | Up to 10:00 | Up to 4 GB | MP4, WebM and MOV | Up to 3:00, files up to 4 GB |
| YouTube Shorts | Vertical or square, up to 1080p | Up to 3:00 | Up to 256 GB | MP4, MOV, WebM, AVI and more | Up to 3:00, files up to 4 GB |
| Facebook Reels | 1080x1920 (9:16) recommended | No limit | Not published | MP4 and MOV | Up to 3:00, files up to 4 GB |
| 256x144 to 4096x2304 | 3 seconds to 15:00 | 75 KB to 5 GB | MP4, MOV, AVI, WebM and more | Up to 3:00, files up to 4 GB | |
| X (Twitter) | 720x1280 recommended for vertical | 0.5 seconds to 2:20 | Up to 512 MB | MP4 and MOV | Up to 2:20 without X Premium, files up to 512 MB |
| Threads | 9:16 recommended, up to 1,920 pixels wide | Up to 5:00 | Up to 1 GB | MP4 and MOV | Up to 5:00, files up to 1 GB |
| Bluesky | Not published | Up to 10:00 | Up to 300 MB | MP4, MPEG, WebM and MOV | Up to 10:00, files up to 300 MB |