Convert MKV to MP3
Extract the audio from your MKV video and save it as MP3. Free, instant, private.
Drop your MKV video here, or click to browse
Converts MKV to MP3 — .mkv files only
Why use PixelTools to convert mkv to mp3
Clean MKV to MP3 conversion
Converts an open video container that bundles video, several audio tracks, and subtitles in one file into lossy-compressed audio built for small file size and universal playback, using ffmpeg's native encoder so the output sounds exactly as intended.
100% private — no upload
Conversion runs entirely in your browser using WebAssembly. Your MKV file is never sent to a server, stored, or seen by anyone but you.
No account, no watermark
Free to use with no sign-up, no file limits, and no watermark on your MP3 output.
Why convert to MP3
the most universally supported audio format — every phone, car stereo, and media player accepts it
Works on any device
Fully responsive with touch-friendly controls — convert your MKV file from your phone, tablet, or desktop without installing anything.
Safe for sensitive recordings
Because nothing leaves your device, this is safe to use on OBS recordings, HandBrake rips of your own discs, and downloaded movies and TV episodes or any other recording you can't upload to a third-party server.
Three steps to convert mkv to mp3
- 1
Drop your MKV video
Drag and drop your MKV video onto the page, or click to browse. Nothing is uploaded — the file stays on your device.
- 2
Conversion runs in your browser
A WebAssembly build of ffmpeg decodes the MKV audio track and re-encodes it as MP3 entirely on your device. A progress bar shows the conversion as it runs.
- 3
Download your MP3 file
Preview the result right on the page, then click Download to save the MP3 file to your device.
Who converts MKV to MP3?
Whether you're a podcaster, a musician, or just need one file in a different format — PixelTools converts MKV to MP3 instantly in your browser, with no upload and no account needed.
Working with OBS recordings, HandBrake rips of your own discs, and downloaded movies and TV episodes
MKV files typically come from OBS recordings, HandBrake rips of your own discs, and downloaded movies and TV episodes. Converting to MP3 makes them usable in the apps and platforms that actually need them.
Publishing or sharing as MP3
the most universally supported audio format — every phone, car stereo, and media player accepts it, which is exactly why people convert MKV to MP3 before sharing or uploading.
Editing and production workflows
Podcast editors, video producers, and musicians convert MKV to MP3 to match the format their DAW, NLE, or publishing platform expects.
Reducing file size for sharing
A MP3 file is often far smaller and easier to email, message, or upload than the original MKV, especially when only the audio is needed.
Frequently asked questions
Is the MKV to MP3 converter free?
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Yes, completely free with no limits. Convert as many files as you want. No subscription, no account, no watermark.
Does this tool upload my video to a server?
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No. The conversion happens entirely in your browser using WebAssembly. Your MKV video never leaves your device.
Why convert MKV to MP3?
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MKV is an open video container that bundles video, several audio tracks, and subtitles in one file, typically from OBS recordings, HandBrake rips of your own discs, and downloaded movies and TV episodes. The most universally supported audio format — every phone, car stereo, and media player accepts it.
Will the audio quality change?
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Converting to MP3 uses a high-quality encoder setting by default, so the difference from the source is minimal for typical listening — but MP3 is a lossy format, so extremely detailed A/B comparisons may reveal small differences from an uncompressed source.
Is there a file size limit?
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Files up to 2GB are supported. Very large files take longer to process since everything runs on your device's CPU rather than a server.
Can I use the converted MP3 file commercially?
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PixelTools does not claim any rights over files you process. The output is yours to use however you like, subject to any rights the original file's owner holds.
My OBS recording saved as MKV. How do I turn it into an MP3 for a podcast or a transcript?
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OBS Studio saves recordings as MKV by default because the file survives a crash mid-recording, but most audio editors and podcast hosts won't open MKV. Converting straight to MP3 pulls out one audio track and skips the video. If your recording keeps game sound and microphone on separate tracks, only one of them is converted, so mix them into a single track first if you need both.
Only have an MP4? Use the MP4 to MP3 converter.
Convert MKV to MP3 now
Free, instant, no account needed.