MP4 to WebM Converter

Convert MP4 videos to WebM, the open format used by websites and HTML5 players. Free, no upload, no watermark.

Choose MP4 videosor drag and drop files here

The video is re-recorded while it plays, so saving takes about as long as the clip (shorter when sped up). Keep this tab open. Chrome and Edge save MP4; other browsers save WebM.

🔒 100% private — processing happens in your browser. Nothing is uploaded.

How to convert MP4 to WebM

  1. Choose your MP4 videos.
  2. Each is converted to WebM (VP9 or VP8) on your device.
  3. Download the WebM files.

WebM is royalty-free and widely used on websites, in HTML5 video players and for transparent or lightweight web clips.

FAQ

Will the file be smaller?

Often, yes, especially for screen recordings and simple scenes.

Need the reverse?

Use WebM to MP4.

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