Guide
WebM to MP3: the sound of a WebM file, as an MP3 that plays anywhere
Drop a WebM file above and get an MP3 of its sound that plays on any phone or player. The file stays on your device.
In short
- This tool saves the sound of a WebM file as an MP3 that plays anywhere.
- It starts at 128 kbps, because the sound inside a WebM is already compressed.
- It suits meeting recordings, browser voice recordings and clips saved from the web.
- Your file is not uploaded. The whole thing runs inside this browser tab.
WebM to MP3
Runs in your browser · files never leave this page
Drop a WebM here
or
Bitrate
128 kbps ≈ 960 KB a minute · 192 kbps ≈ 1.4 MB a minute · 320 kbps ≈ 2.4 MB a minute
Your file never leaves this page. The engine downloads once, the work happens in this tab, and there is no upload, no account and no storage. Close the tab and the file is gone unless you downloaded it.
More free tools: Video compressor · Video resizer · Video to MP4 · Video to MP3 · Video clipper · all tools
What sound is inside a WebM file?
A WebM holds Opus or Vorbis sound, which many players and apps cannot open.
- Opus is the sound you get in most browser and call recordings.
- Vorbis turns up in older WebM files.
- An MP3 plays on every phone, car stereo and player.
- The box also takes .ogg and .opus audio files.
Why 128 kbps is the starting point
The sound in a WebM is already compressed, and converting it cannot bring back detail that is gone.
- 128 kbps sounds close to the original for speech, calls and meetings.
- 192 kbps is worth it for music you saved from the web.
- 320 kbps rarely helps with a WebM. It only makes the file bigger.
MP3 quality and size
| Quality | Best for | Size per minute |
|---|---|---|
| 128 kbps | Speech, calls, meetings | 0.96 MB |
| 192 kbps | Music from the web | 1.44 MB |
| 320 kbps | Rarely worth it for WebM | 2.4 MB |
Quality: 128 kbps
- Best for
- Speech, calls, meetings
- Size per minute
- 0.96 MB
Quality: 192 kbps
- Best for
- Music from the web
- Size per minute
- 1.44 MB
Quality: 320 kbps
- Best for
- Rarely worth it for WebM
- Size per minute
- 2.4 MB
This is the whole editor
Highlight a phrase and a clip lands on those exact words. No timeline, no keyframes, no layers.
How to convert a WebM to MP3
Four steps, all in this tab. Only the sound is read, never the picture, so even a long recording is quick.
WebM to MP3 in four steps
Drop your WebM
In the box at the top
Pick a quality
128, 192 or 320 kbps
Press Extract MP3
The picture is dropped
Download the MP3
Saved to your device
Limits of a browser tool
Everything runs on your own device, so your device sets the limits.
- File size: up to 500 MB runs comfortably. Bigger files may run out of memory.
- Speed: the engine uses one processor core, so a long re-encode takes minutes.
- First run: the engine downloads once, about 32 MB. After that it starts fast.
- Phones: it works, but a laptop is faster and has more memory.
Questions people ask
- Does converting WebM to MP3 lose quality?
- A little, because the sound is compressed a second time. For speech you will hardly hear it at 128 kbps. For music, pick 192 kbps.
- Can I convert .ogg or .opus files too?
- Yes. The box also takes .ogg, .opus, .m4a, .aac, .wav and .flac files and saves their sound as an MP3.
- Why does my WebM have no sound?
- Screen recordings made without a microphone or tab sound are silent. The tool tells you there is nothing to save.
- Can I turn the WebM into an MP4 video instead?
- Yes. The free WebM to MP4 converter keeps both the picture and the sound, and makes a video that plays everywhere.
- Is my WebM uploaded anywhere?
- No. The tool runs inside this browser tab, so your WebM never leaves your device. Only the engine itself is downloaded, about 32 MB, once per visit.
Want a finished video with captions, not just an audio file? Cutroom edits your clip for you. Your first video is free.