WebM to MP4
Convert WebM to MP4 for free. WebM is common for web video but editing software and phone galleries often refuse it. Runs locally in your browser — no upload, no account, no watermark.
Result right hereDrop a video here, or click to choose
MP4 · MOV · MKV · WebM · audio · images · subtitles · ZIP
WebM is an open format designed for the web: browser screen recordings, exports from some online tools, and video on certain sites all use it. Outside the browser support drops off — plenty of editors and phone galleries do not recognise it.
Once it is MP4, editing, uploading and sharing stop tripping over the format.
Conversion is entirely local; download as soon as it finishes.
FAQ
Is WebM lower quality than MP4?
No, both are containers. The VP9 codec commonly found in WebM is arguably better at the same bitrate — it simply has narrower compatibility than H.264.
Will a transparent WebM stay transparent?
No. The H.264 codec used in MP4 has no alpha channel, so transparent areas turn black. To keep transparency, stay with WebM or export a GIF.
Is it slow?
It uses the hardware encoder — usually quicker than the video runs.
Can I go the other way, MP4 to WebM?
Yes, with the "video to WebM" tool.
Is anything uploaded?
No.