Convert WEBM to MP3
Web meeting tools, browser-based recorders and some screen recorders produce WEBM. The audio inside is usually Opus, which many players won't open; convert it to MP3 and listen anywhere.
Free · no sign-up · your file is processed in your browser and never sent to a server
No file handy? Try it with a 20-second Turkish meeting recording.
How to use
- Choose your WEBM fileDrop one or more WEBM files. On this page the tool only accepts WEBM; for other formats, use the audio converter.
- Pick the qualityChoose the MP3 bitrate: 128 kbps for speech, 192–320 kbps for music.
- Convert and downloadFiles are processed one after another; each finished file comes with its own download link.
WEBM and MP3 at a glance
| WEBM | MP3 | |
|---|---|---|
| Codec | Audio usually Opus (sometimes Vorbis) | MPEG Layer III |
| Type | Web container | Lossy |
| Approx. size | Opus 64–128 kbps: ~0.5–1 MB/min | 128 kbps: ~1 MB/min · 320 kbps: ~2.4 MB/min |
| Typical source | Browser recordings, some screen recorders, web meeting recordings | Music libraries, podcasts, recorder apps, almost every device |
Why convert?
- Sharing the audio of a web meeting or browser recording
- Devices that won't open WEBM
- Separating the audio before transcribing the speech
Common issues with WEBM files
- WEBM with video: The video is dropped and only the audio is converted.
- Missing duration: Some browser recordings don't store a duration; converting to MP3 fixes it.
- Safari: Older versions may not open some WEBM files; try Chrome, Edge or Firefox.
Privacy: your file never leaves your device
Everything happens in your browser. Your file is not sent to Voiser's servers or stored anywhere, and it's cleared from memory when you close the tab. That's also why the tool stays fast on a slow connection.
Common questions
Is WEBM video or audio?
WEBM is a container: it can hold audio only, or video and audio. Either way, the tool takes the audio track.
Which format should I pick to keep the quality?
For sharing, 192 kbps MP3 is enough. To keep the source unchanged, choose OGG in the audio converter; the Opus audio can be kept without re-encoding.
Can I transcribe a meeting recording?
Yes. After converting to MP3, Transcription turns the speech into text and separates the speakers.
Is my file uploaded to a server?
No. Your WEBM file is converted in your browser; it isn't sent to Voiser or anywhere else, and it isn't stored.
Related tools
- Audio converterConvert files between MP3, WAV, M4A, OGG and FLAC.
- Extract audio from videoSave the audio track of your own videos as MP3, M4A or WAV.
- MP3 cutter and audio trimmerSelect any part of an audio file on the waveform and cut it out.
- Audio joinerMerge several audio files into one, in the order you choose.
Turn your converted recording into text.
Transcription turns speech into time-stamped text with separate speakers. Start with a free account.