Size a video for Douyin
Crop to 9:16 at 1080×1920, which is what Douyin and TikTok expect. The box lands centred and you drag it onto your subject. Free, in your browser, no account.
Result right hereDrop a video here, or click to choose
MP4 · MOV · MKV · WebM · audio · images · subtitles · ZIP
Upload something that is not 9:16 and the platform letterboxes it for you, badly. Cropping it yourself is how you keep control of the framing.
The crop box arrives locked to 9:16, so the only decision left is where your subject sits in the frame.
Output is 1080×1920 — the resolution these platforms re-encode to anyway, so going higher only costs upload time.
FAQ
Is 1080×1920 required?
It is what the platform targets. Higher resolutions are re-encoded down, so there is nothing to gain.
Is there a length limit?
That belongs to the app, not to this page. Trim first if you need a specific length.
What about the file size?
Run it through the compression tool afterwards if the upload is slow.
Does the sound survive?
Yes, carried over untouched.
Does this work for TikTok too?
Yes — same shape, same resolution.