mp3bat
MKV → MP3

Private by design

Convert MKV to MP3 without uploading a thing.

MKV (Matroska) is a flexible video container popular for high-quality rips and recordings. mp3bat extracts its audio track to MP3 in your browser, with nothing uploaded.

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 MKV → 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 MKV?

MKV (Matroska) is an open container that can hold many video, audio, and subtitle tracks. It's powerful but unevenly supported by players — extracting the audio to MP3 gives you something that plays everywhere.

How to convert MKV to MP3

  1. Drop your MKV 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

Which audio track gets extracted from an MKV?

The default audio track is extracted. MKV files can carry several; support for choosing a specific track may come later.

Is MKV to MP3 done on a server?

No. The extraction runs locally with ffmpeg compiled to WebAssembly, so your file stays on your device.

Other conversions

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