WebM is the open video format of the web, created by Google. Browsers produce it when they record the screen, the webcam or a call, and many online tools export to it. Its sound is usually Opus or Vorbis.

Why convert WebM to MP3?

Apple devices, many car radios, older players and some apps don't read WebM or its Opus sound. An MP3 plays everywhere — and it is much lighter if you only need the audio of a recording.

My WebM came from a browser recording. Will it work?

Yes. Recordings made by browsers often have no duration in their header; the tool measures the real length anyway, so the start and end handles and the progress bar work normally.

Can I keep the Opus quality?

Opus is very efficient at low bitrates. Converting it to MP3 at 128 kbps (voice) or 192 kbps (music) keeps a transparent quality; choose OGG if you prefer to stay in an open format.

Is my WebM uploaded to a server?

No. FFmpeg runs inside your browser through WebAssembly: the video never leaves your device, and the tool keeps working on a slow connection once loaded.

Is there a size limit?

Videos up to 100 MB are accepted. The first conversion downloads the audio engine (about 30 MB, cached afterwards); the next ones start immediately.

Audio Tool · 100% local

WebM to MP3 Converter

Turn WebM recordings — from a browser, a screen recorder or a web app — into an MP3 that every device plays, iPhone included.

100% local

Format

Quality

Drag & drop a video here

or browse your files

MP4, MOV, AVI, MKV, WebM · Max 100 MB per file

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Everything about WebM to MP3

WebM: the format of web recordings

WebM is used by browser screen recorders, webcam and microphone recordings, many web meeting tools, and video exports from online editors. It plays fine in Chrome and Firefox, but Apple devices, car radios and many desktop apps can't read it.

Opus and Vorbis to MP3

The sound of a WebM is encoded with Opus (recent recordings) or Vorbis (older ones), two open codecs. The converter decodes it with FFmpeg and re-encodes it with the LAME MP3 encoder at the bitrate you choose, ignoring the video track.

Converted on your device

Screen and meeting recordings often contain private information. This converter never uploads them: everything happens in your browser, and the file only goes where you save it.

How it works

How to convert WebM to MP3

Add your WebM file
Drag and drop the WebM video onto the page, or browse to select it. Other video formats work too.
Keep MP3 or pick another format
MP3 is preselected. Choose the quality, and move the start / end handles if you only need part of the sound.
Download the audio
The file is ready in seconds, named after your video. Download it, or send it to the audio compressor.

Practical guides

Tips & guides

Recordings from calls and meetings

Many web meeting and recording tools save WebM. Extract the MP3 to listen again, share the audio, or send it to a transcription service.

Only the speech matters? 128 kbps keeps voices perfectly clear for a third of the size of 320 kbps.

Pro tip

100% private

Your WebM is converted by your own browser. Nothing is uploaded, stored or tracked.

Safe for personal videos, recorded meetings and unreleased footage.

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Frequently asked questions

Everything about converting WebM to MP3