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Private in your browserNo upload to any server

Convert Video to WebM

Choose a video, adjust output format, size, resolution or trim settings, and download the converted file from your browser.

Private: processed in your browser

Input formats: MP4 · MOV · M4V · WEBM · MKV · AVI · 3GP · MPG · MPEG · TS · MTS · M2TS · VOB · FLV · WMV* · ASF* · OGV

Output formats: MP4 · MOV · WEBM · MKV · MP3 · M4A/AAC · WAV · FLAC · OGG · OPUS · GIF · WEBP

* Marked formats depend on this device's browser codecs.

Private: the file stays on your device. The browser downloads a video engine once and sends no file to this server.

How to use this video converter

  1. Choose a video or audio file from your device.
  2. Pick MP4, MOV, WebM, MKV, MP3, AAC, WAV, FLAC, OGG, OPUS, GIF or animated WebP output.
  3. Optionally set a target size, width, trim range or silent export.
  4. Run the conversion locally in your browser and download the result.

FAQ

Are my videos uploaded to this website?

No. Video and audio files are processed locally in your browser. The server receives no file.

Can this convert MP4 and WebM?

Yes. The browser ffmpeg engine can export MP4, MOV, WebM, MKV, MP3, AAC, WAV, FLAC, OGG, OPUS, GIF and animated WebP when the device has enough memory.

Why is video conversion slower than image compression?

Video encoding is CPU-heavy. Large files, 4K footage and mobile browsers may take longer.

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