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WebM Converter

Convert WebM files to MP4, MOV, AVI, MKV, GIF or MP3. Choose the target format, adjust the options and download. WebM is an open, royalty-free container built for the web, usually holding VP8 or VP9 video with Opus or Vorbis audio. Browser screen recorders and many web apps save WebM by default.

  • Free, no sign-up
  • Files never leave your device
  • Powered by FFmpeg
  • No watermark
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Your files are processed on this device and are never uploaded to a server.

WebM

WebM WebM Video

WebM is an open, royalty-free container built for the web, usually holding VP8 or VP9 video with Opus or Vorbis audio. Browser screen recorders and many web apps save WebM by default.

WebM converter

How to use the WebM Converter

  1. 1

    Choose or drop your WebM file.

  2. 2

    Pick the format you want to convert to and adjust the options.

  3. 3

    Click Convert and download the result.

What is a WebM file?

WebM is an open, royalty-free container built for the web, usually holding VP8 or VP9 video with Opus or Vorbis audio. Browser screen recorders and many web apps save WebM by default. It is a lossy format best suited to web embeds and royalty-free video. The main drawback is that iPhones, some TVs and many editors play it poorly or not at all.

Frequently asked questions

Will the MP4 lose quality?

Both formats are lossy, so converting re-encodes the data once more. Using a high quality setting keeps the generational loss very small. Avoid converting the same file back and forth repeatedly.

Does converting WebM to MP4 re-encode the video?

Rarely: the codecs are not compatible, so the video is re-encoded. A typical WebM contains VP8, VP9 or AV1 video with Opus or Vorbis audio. Otherwise the result is H.264 with AAC audio.

Questions about privacy, file-size limits or conversion speed are answered in the general FAQ.