WEBM to MP3 converter
Turn WEBM files into MP3 in seconds, inside this tab. Only the audio track is kept. Nothing is uploaded.
- Runs on your device
- No upload
- No sign-up
- Free
Drop WEBM files here (any other format works too)
Stays on this device: nothing is uploaded. You can also drag a file here or paste it.
MP3: sharing, podcasts, car stereos, anything that must just play.
How to convert WEBM to MP3
- Choose your .webm files or drop them on the box above. You can add several.
- MP3 is already selected. Leave the bitrate at 192 kbps or change it.
- Conversion starts straight away. Press Download next to each finished file, or Download all.
WEBM vs MP3
| WEBM | MP3 | |
|---|---|---|
| Full name | WebM video | MPEG-1 Audio Layer III |
| Type | Video container | lossy |
| Codec | VP8/VP9/AV1 video + Opus or Vorbis audio | MP3 (LAME encoder) |
| Size | depends on the video | 0.96 MB at 128 kbps, 2.4 MB at 320 kbps |
| Plays on | Browsers, VLC; not QuickTime | Everywhere: every phone, browser, car and media player made in the last 25 years |
WEBM. WebM is the open web video container. Browser screen recorders, OBS presets and many online downloads save WebM with Opus audio.
MP3. MP3 throws away sound the ear is unlikely to notice, using a psychoacoustic model, so a song shrinks to roughly a tenth of its CD size.
What happens to quality
Going from one lossy format to another re-encodes the audio, which costs a little quality each time. Pick a bitrate at or above the source’s to keep the loss inaudible. What bitrate really means.
Want the original audio with zero re-encoding? Extract the audio track losslessly instead.
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Questions people ask
How do I convert WEBM to MP3 without uploading?
Choose or drop your .webm file above. AudioKit converts it to MP3 inside your browser with ffmpeg.wasm and gives you a download. The file is never sent to a server, and you can convert several at once.
Will I lose quality converting WEBM to MP3?
Going from one lossy format to another re-encodes the audio, which costs a little quality each time. Pick a bitrate at or above the source’s to keep the loss inaudible.
What bitrate should I choose for MP3?
192 kbps is a good default. Going above the source file’s bitrate doesn’t improve sound, it only makes the file larger. For voice recordings, 96–128 kbps is plenty.
Can I convert a WEBM longer than an hour?
Yes. The video is read in place rather than copied into memory, and only its audio track is decoded. A one-hour WEBM usually converts in a few minutes on a laptop; phones are slower but work.
Is this WEBM to MP3 converter safe?
It’s about as private as a converter can be: nothing is uploaded, there is no account and no installer. The page needs a modern browser with WebAssembly (any current Chrome, Edge, Firefox or Safari).