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MP4 to WebM Converter

Free MP4 to WebM converter. 100% in your browser — nothing uploaded.

100% in your browser — your files never leave this device

Video Converter

Drop a video here or click to browse

MP4, WebM, MOV…

MP4, WebM, MOV → MP4 (H.264) or WebM (VP9). Shrink resolution to slim files down.

Drop a video above first. Short clips convert in seconds; long videos take a while on phones.
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How to convert MP4 to WebM

  1. Tap choose files (or drag and drop) and pick your MP4 file.
  2. WebM is already selected for you — adjust size or quality if you like.
  3. Press convert and download your WebM. That's it — nothing is uploaded anywhere.

MP4 vs WebM

MP4: MP4 is the universal video format — it plays almost everywhere, from phones and TVs to social media.

WebM: WebM is an open video format designed for the web; it's well supported by Chrome, Firefox and Android.

Questions

Is it free to convert MP4 to WebM?

Yes. FilesFi is free with no signup and no watermark.

Are my files uploaded?

No. The conversion runs entirely inside your browser, so your files never leave your phone or computer.

Why convert MP4 to WebM?

MP4 is the universal video format — it plays almost everywhere, from phones and TVs to social media. WebM is an open video format designed for the web; it's well supported by Chrome, Firefox and Android.

Which browsers work?

Video conversion uses your browser's built-in video engine — use the latest Chrome or Edge on a computer for best results.

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