Extract the audio track from a WebM file (e.g. a downloaded web video) to MP3 locally. The video never leaves your device.
Running locally on your device ...
Running locally on your device ...
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Your files never left your device
No. Everything runs in your browser - your file never leaves your device. How this is verifiable
WebM is the open, royalty-free video format of the web (Google/Xiph), often with Opus or Vorbis audio - the container behind many downloaded YouTube videos, screen recordings and web clips. For a plain audio version of such a clip, you do not need to keep the video file.
The tool demuxes the WebM container, drops the video track (-vn) and natively decodes the contained Opus or Vorbis audio track before re-encoding it with libmp3lame to MP3 at the chosen bitrate - making the clip playable on any device and in any player.
Since WebM audio is usually already compactly encoded, a medium bitrate keeps additional loss small. The conversion runs entirely locally in the browser, with the clip never uploaded.
| Input formats | WEBM |
|---|---|
| Auto-conversion | PNG, GIF, MP4 |
| Output format | MP3 |
| Batch processing | No |
| Processing | Locally in your browser (WebAssembly) |
| File upload | None |
Limitations: Very large/long WebM videos can hit memory limits on mobile devices. One file per run.
No, the entire extraction runs locally in your browser.
Usually from web downloads, screen recordings or video snippets from modern browsers.
Usually Opus or Vorbis - both are natively decoded.
Yes, there are dedicated tools for MP4/MOV/MKV/AVI.