Tools / Convert / MP4 to WebM
Convert Runs in browser

MP4 to WebM.

Convert MP4 to open WebM format locally.

Your videos never leave your device 100% local processing No uploads No account
Processed locally — no upload. MP4 to WebM runs entirely in your browser. Large files use more memory and processing time depends on your device. Re-encoded video is exported as WebM here (MP4 requires cross-origin isolation, e.g. a production deploy in Chrome/Firefox).

Drop your video here

or click to browse — MP4, WebM, MOV, MKV, M4V

Files stay on your device · nothing is uploaded

Settings

Load a video to configure mp4 to webm.
Privacy first100% local processing

Convert MP4 video to open WebM format locally

MP4 to WebM converts an MP4 recording into the open WebM format.

WebM is widely used for web video and works well in modern browsers.

Conversion happens locally so the original MP4 is never uploaded.

100% local processing

Your videos never leave your device.

VideoDock processes your files inside the browser tab. Nothing is uploaded to a VideoDock processing server, stored in the cloud or sent to a third-party video processing service.

No video uploads
No account required
Local browser processing
Privacy-first by design
HowSimple workflow

How to use MP4 to WebM

  1. Select the MP4 file.
  2. Choose the required output resolution.
  3. Select whether to keep the audio.
  4. Convert the file locally to WebM.
  5. Download the WebM result.
FormatsBrowser compatible

Supported formats

Input is MP4 and the output is WebM. Decode compatibility depends on the codec contained in the MP4 file.

MP4→WebM
?MP4 to WebM FAQ

WebM is an open format optimized for modern web browsers and web delivery.

No. VideoDock processes the file locally inside your browser. Your video is not uploaded to a VideoDock processing server or stored in the cloud.

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