Extract the audio from a WebM video as MP3, free, no upload.
Open Extract AudioWebM is the format behind a lot of web and streaming video. When you want just the sound as a portable file, converting WebM to MP3 gives you a small, universal audio track that plays on any device or music app.
The WebM audio is decoded and re-encoded to MP3 at the bitrate you pick. For voice, 128 kbps is plenty; for music, 256 to 320 kbps keeps it crisp.
| Format | File Size | Quality | Compatibility | Use Case |
|---|---|---|---|---|
| MP3 | Small | High (lossy) | Universal | Music, podcasts, every player |
| M4A (AAC) | Smallest | High (lossy) | Apple, modern players | Smaller files, Apple devices |
| WebM | Medium | Video + audio | Modern browsers | The original web video |
Open the WebM to MP3 converter
Click the button above or go directly to /tools/extract-audio. No signup required- the tool is free and works instantly in your browser.
Drop your files
Drag and drop your WebM files onto the upload area, or click to browse. You can convert up to 20 files at once on the free plan (500 on Pro).
Download your MP3 files
Click Download on each file or use Download All as ZIP to save everything at once. All processing happens in your browser- nothing is uploaded to a server.
Complete privacy
Your files never leave your device. All conversion happens inside your browser using the Canvas API and WebAssembly.
Instant results
No upload, no queue, no waiting for a server. Conversion starts the moment you drop your files.
True batch processing
Convert up to 20 files at once on free (500 on Pro) and download them all as a ZIP. No signup required.
Always free
Core conversion tools are free forever. No watermarks, no file size caps on common formats, no account required.
How do I convert WebM to MP3?
Drop the WebM into omnikitbolt's Extract Audio tool, choose MP3, and download. It runs entirely in your browser with no upload.
Will the quality be good?
Yes. Choose 192 to 320 kbps for music. The re-encode to MP3 is inaudible at those bitrates for most listeners.
Is my file uploaded?
No. The extraction happens locally with WebCodecs. Your WebM never leaves your device.
Ready to convert? It takes less than 10 seconds.
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