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First run downloads FFmpeg (~25 MB) once in this browser. Need MP4 instead? Try /mp4-to-mp3.

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MKV to MP3 converter — extract audio online

Convert MKV to MP3 online free. Extract audio from Matroska (.mkv) video as MP3 with selectable bitrate — no server upload required.

What is an MKV to MP3 converter?

An MKV to MP3 converter extracts the audio track from a Matroska (.mkv) video and saves it as MP3. People search convert MKV to MP3 or MKV to MP3 converter when they want the soundtrack without the video file. This free tool runs locally with FFmpeg WebAssembly — no server upload.

MKV to MP3 converter features

Extract audio from MKV as MP3 online, privately in the browser.

  • Convert MKV to MP3 online

    Upload an MKV file and download extracted audio as MP3 in your browser.

  • Matroska audio extraction

    Pull the audio track from MKV containers for listening or editing.

  • Selectable MP3 bitrate

    Choose 96 to 320 kbps depending on quality and file size needs.

  • No server upload

    All conversion runs locally with FFmpeg WebAssembly for privacy.

  • Simple download flow

    Download the MP3 output immediately after conversion completes.

How to convert MKV to MP3

Extract MP3 audio from MKV in three steps.

  1. Upload MKV video

    Drop your .mkv file (up to 200 MB).

  2. Choose MP3 bitrate

    Pick 128 kbps for balance or 192/320 kbps for higher audio quality.

  3. Convert and download

    Click Convert to MP3, then save the audio file.

Great for

Common MKV to MP3 extraction scenarios.

  • Anime and TV rips

    Save audio from MKV episodes for offline listening.

  • Soundtrack extraction

    Turn MKV concert or music videos into MP3 tracks.

  • Smaller sharing

    Send MP3 audio instead of a large MKV video file.

  • Podcast and voice clips

    Extract spoken content from MKV recordings as MP3.

Frequently Asked Questions

Quick answers about this tool—open a question to read more.