mp3bat
WEBM → MP3

Private by design

Convert WEBM to MP3 without uploading a thing.

WEBM is the open web video format, common for downloads and recordings. mp3bat extracts its audio to MP3 entirely in your browser — no upload, no sign-up.

STAYS ON YOUR DEVICE
Drop an audio or video file, or click to choose
It opens here, in this tab — not on our servers.
WAV · M4A · AAC · OGG · FLAC · MP3 · MP4 · MOV · MKV · WEBM → MP3
✓ Your browser— — ✕ — —our servers
About WEBM → MP3. The audio track is extracted from the video entirely in your browser using the built-in engine. The first video conversion downloads the engine once (~32 MB), then it's cached — nothing is uploaded.

What is WEBM?

WEBM is an open, royalty-free container (usually VP8/VP9 video with Vorbis or Opus audio) built for the web. Extracting the audio to MP3 makes it playable on devices and apps that don't handle WEBM.

How to convert WEBM to MP3

  1. Drop your WEBM file into the box above (or click to choose it).
  2. Pick a bitrate — 320 kbps for best quality, 192 kbps for a smaller file.
  3. Click Convert to MP3. It runs in this tab, on your device.
  4. Download your MP3. Nothing was ever uploaded.

FAQ

Why convert WEBM to MP3?

WEBM isn't supported everywhere, especially on older or non-browser players. Pulling the audio into MP3 gives you a file that plays on practically anything.

Does this work offline after the first time?

Largely, yes — once the engine has downloaded and cached, the conversion itself is entirely local and never contacts a server.

Other conversions

New to this? See how the on-device conversion works, or the guide on choosing a bitrate.