Convert WebM to MP4

Drag your WebM files here

Or

WebM is great on the web but awkward everywhere else. Convert it to H.264 MP4 and it will play on iPhones, in Safari, in PowerPoint and Keynote, and in every social and messaging app.

How to convert WebM to MP4

  1. Add your WebM filesDrag them onto the drop zone above, or click to browse. Add as many as you like — they stay on your computer.
  2. Tune the settingsSet quality, frame rate and scale.
  3. Convert and downloadClick Convert. Each finished MP4 file gets its own download button, or grab everything with Download all.

When to convert WebM to MP4

Screen recordings, browser captures and downloaded web video often arrive as WebM. MP4 with H.264 is the format virtually every device, editor and platform accepts, so converting saves you compatibility headaches.

Standard MP4 cannot store transparency, so transparent WebM becomes a solid-background MP4. If you need alpha outside the browser, convert WebM to MOV instead.

Frequently asked questions

Will my MP4 play on iPhone?

Yes. The MP4 uses H.264 video and AAC audio, which every iPhone, iPad and Mac plays.

Can MP4 keep WebM transparency?

Standard H.264 MP4 cannot. For transparency outside the browser, use WebM to MOV, which outputs ProRes 4444 with alpha.

Why is the MP4 bigger than my WebM?

VP9 compresses more efficiently than H.264. Lower the quality fader a little if you need a smaller MP4.

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