Size a video for Bilibili
Convert to 1080p MP4, which is what Bilibili re-encodes to anyway. Runs in your browser, so nothing is uploaded twice. Free, no account, no watermark.
Result right hereDrop a video here, or click to choose
MP4 · MOV · MKV · WebM · audio · images · subtitles · ZIP
Uploading something the platform has to work hard to read means a longer wait and a worse result. Handing it a clean 1080p MP4 skips both.
Output defaults to 1080p H.264 in an MP4 container — the combination every platform handles without complaint.
Going above 1080p rarely helps: the platform re-encodes anyway, and the upload takes proportionally longer.
FAQ
Should I upload 4K?
Only if the detail genuinely matters. It gets re-encoded either way, and the upload is four times the size.
What frame rate?
Whatever you shot. Changing it is more likely to hurt than help.
How long can it be?
That is the platform’s rule, not this page’s. Trim first if you need a specific length.
Does it add a watermark?
No.
Is anything uploaded here?
No — conversion happens on your own device.