Video size checker for Reels, TikTok and Shorts
Pick a video file. Your browser reads its resolution, aspect ratio, length and size, then checks them against each platform’s published limits. The file never leaves your device.
Check a video
Nothing is uploaded. The check runs on your device.
We can’t read the frame rate or codec from a browser, so check those in your editor’s export settings (each platform asks for about 23–60 fps; H.264 MP4 is the safest choice).
Published limits we check
| Platform | Length | Frame | Max file | Notes |
|---|---|---|---|---|
| Instagram Reels | 3 s – 15 min | 9:16 (Meta recommends it to avoid cropping or blank space); max 1920 px wide | 300 MB | Publishing API spec: MOV or MP4, H.264 or HEVC, 23–60 fps. |
| TikTok | up to 10 min | Vertical video fills the screen; 360–4096 px per side | 4 GB | API limit is 10 minutes; every creator can post 3-minute videos, some accounts can post 5 or 10 minutes. 23–60 fps. |
| YouTube Shorts | up to 3 min | Square or vertical | not stated | A square or vertical video up to three minutes counts as a Short. |
| Facebook Reels | 3 s – 1.5 min | 9:16 at 1080×1920; min 540×960 | not stated | Reels publishing API: 9:16, 1080×1920 recommended (minimum 540×960), 24–60 fps, 3–90 seconds. |
These are the limits each platform documents for publishing (Instagram, TikTok and Facebook through their official APIs). The limits inside each app can differ and change without notice.
Questions and answers
What size should a Reel, TikTok or Short be?
Vertical 9:16 fills the screen on all four. 1080×1920 pixels is the common choice; Facebook recommends exactly that and Meta recommends 9:16 for Instagram Reels.
Is my video uploaded anywhere?
No. The page uses your browser’s built-in video reader on the file you pick. Nothing is sent to our servers.
How long can a YouTube Short be?
Up to three minutes, if the video is square or vertical, according to YouTube Help.
Why does it say my video fits when the app rejects it?
The page checks size, shape, length and file size. It cannot check frame rate, codec or audio, and apps sometimes apply limits that differ from the published API limits.
Sources
- Instagram Platform: IG User Media (content publishing) reference (Meta for Developers), last checked 2026-10-27. Caption max 2,200 characters, 30 hashtags, 20 @ tags. Reels: MOV/MP4, H.264 or HEVC, 23–60 fps, max 1920 px wide, aspect 0.01:1–10:1 (9:16 recommended), 3 s–15 min, max 300 MB.
- Content Posting API: media transfer guide (TikTok for Developers), last checked 2026-10-27. MP4 (recommended)/WebM/MOV, H.264 recommended, 23–60 fps, 360–4096 px each side, max 4 GB, API max 10 min; all creators can post 3-minute videos.
- Understand three-minute YouTube Shorts (YouTube Help), last checked 2026-10-27. Shorts: up to three minutes, square or vertical aspect ratio.
- Video API: Reels publishing guide (Meta for Developers), last checked 2026-10-27. MP4 recommended, 9:16, 1080×1920 recommended (minimum 540×960), 24–60 fps, 3–90 s.