TikTok video checker
Drop a video to check its size and ratio, length, file size, format and frame rate against what TikTok publishes, before you post it.
- Free, no sign-up
- Your videos stay on your device
- Rules checked October 28, 2026
Drop your videos
One file or a batch. MP4 and MOV are read directly, including phone rotation; other formats through your browser. Nothing is uploaded.
Rules from TikTok's developer guide and video specs, read on October 28, 2026.
TikTok video size and length in 2026
- Shape
- 9:16 vertical1:1 and 16:9 are accepted; only 9:16 fills the screen
- Size
- 540 × 960 or more360–4,096 pixels per side in the developer guide
- Length
- 3 minutes for everyone5 or 10 minutes on some accounts
- File
- 4 GB, MP4 recommendedMOV and WebM too; H.264, H.265, VP8, VP9
- Frame rate
- 23–60 fpsTikTok developer guide
Sources: TikTok for Developers: Content Posting API, media transfer guide · TikTok Ads Manager: Auction In-Feed Ads specifications, read on October 28, 2026.
Why 9:16, at 1080 × 1920
TikTok shows video full screen on a phone held upright, so a 9:16 frame fills it and 1:1 or 16:9 shows with bars. TikTok's own video specs list 9:16 as recommended with a minimum of 540 × 960; exporting at 1080 × 1920 gives TikTok twice that to work with. Captions and buttons cover the edges of the frame, so check where with the safe zone checker.
About the length limit
TikTok's developer guide says every creator can post 3-minute videos and some have access to 5- or 10-minute videos. You'll see longer limits quoted elsewhere, but TikTok's pages above don't publish one, so the checker tells you when a video is over 10 minutes and leaves the final word to the app.
Posting the same clip to YouTube and Instagram too? The YouTube Shorts checker and the Instagram Reels checker run each platform's own rules.
How it reads your video
Your browser reads each MP4 or MOV file in slices, so even a multi-gigabyte video is never loaded whole: the moov box at the start or end of the file holds its length, frame size, frame rate and codec, and the rotation flag a phone writes says which way up the frame plays. Other formats go through the browser's own player. The video never leaves your device. Each value is checked against TikTok's own pages listed above, read on the date shown.
Embed this checker
Teachers, bloggers and course creators can put this TikTok video checker on their own page for free. Paste the code below into your page's HTML. It loads from markstudios.com, so it stays current when we update the numbers.
Questions, answered.
Anything else? Message Mark and you'll get a written reply within one business day.
What size should a TikTok video be?
Vertical 9:16. TikTok’s video specs list 9:16 (recommended, at least 540 × 960), 1:1 (at least 640 × 640) and 16:9 (at least 960 × 540), and only 9:16 fills a phone screen. TikTok’s developer guide allows 360 to 4,096 pixels on each side.
How long can a TikTok video be?
TikTok’s developer guide says every creator can post 3-minute videos, while some have access to 5-minute or 10-minute videos. TikTok doesn’t publish a longer in-app limit on those pages, so if your video is over 10 minutes, check in the app whether your account can post it.
What is the maximum file size for a TikTok video?
4 GB in TikTok’s developer guide, which sets the limits for videos sent to TikTok by apps and tools. TikTok’s ad specs cap in-feed ad videos at 500 MB.
Which formats and codecs does TikTok accept?
MP4 (recommended), MOV and WebM, encoded with H.264 (recommended), H.265, VP8 or VP9, at 23 to 60 frames per second, according to TikTok’s developer guide.
Does this tool upload my video?
No. The checker reads the file on your device and nothing is uploaded, so you can check a video before anyone sees it.
Rather have the clips made for you?
Vertical cuts from your long videos, captioned and sized for TikTok, Reels and Shorts, and you work directly with Mark.
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