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Convert MKV to MP3 on your Mac

macOS and QuickTime won't open MKV. Convert MKV to MP3 on your Mac so it plays everywhere, with nothing uploaded. The desktop app batches entire folders.

Conversion Successful
100% local. Your file is processed in this tab and never uploaded.

How to Convert MKV to MP3 on a Mac

  1. 1

    Drop your MKV file

    Drag it into the converter above, or click to browse. Nothing is uploaded.

  2. 2

    Adjust settings (optional)

    Trim, crop, resize, mute, or set quality from the sliders icon.

  3. 3

    Convert and download

    MP3 is preselected. The file converts in this tab and downloads when done.

Why Convert MKV to MP3?

MKV is the container people use when they want everything in one file: several audio tracks, subtitles, chapters, whatever the source had. Great for archiving.

Useless in a car stereo, which is why converting to MP3 makes sense when the only part you ever wanted was the sound, and all that carefully preserved metadata is weight you are hauling around on a phone.

MKV
MP3
Container
Matroska (MKV)
Compression
Lossy
Typical codec
H.264 / H.265 / AV1
Typical bitrate
128-320 kbps
Audio codec
AAC / AC3 / DTS / FLAC
Sample rate
44.1 kHz / 48 kHz
Streaming friendly
No
Metadata
ID3 tags
Device support
PC media players, limited TVs
Device support
Universal
Typical use
HD/4K video archives
Typical use
Music, podcasts

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Frequently Asked Questions

How do I convert MKV to MP3 on a Mac?
Drop the file into the converter above, pick MP3, then hit Convert. Your Mac does the whole job inside this tab, so the file is never uploaded and the page keeps working with the Wi-Fi off. The desktop app adds folder-at-a-time batches and drops the browser size caps.
Which audio track gets used?
The first one in the file. MKVs with several language tracks need the desktop app, where FFmpeg can pick a specific stream.
Can the browser handle a large MKV?
Up to 500 MB. The conversion happens inside the tab with WebCodecs, so a big file is limited by your Mac's memory rather than an upload speed. Bigger than that, use the desktop app.
Will the audio be re-encoded?
Yes. MP3 is a different codec from whatever the MKV held, so the audio is decoded and encoded once. Choose FLAC or WAV instead if you would rather not compress it again.
Do subtitles survive?
No. An MP3 holds audio only. Subtitle and chapter data are dropped, which is the point of the conversion.
Is my file private?
Yes. The conversion runs in your browser tab and nothing is uploaded, so your files never leave your device. The only limit is size: 500 MB for this format. Bigger files route to the desktop app.

Ripping audio from a season of files?

The desktop app runs a whole folder of MKVs through FFmpeg in one pass, locally on your Mac, with no browser size limit.

Get TeraConvert for MacThis format runs in the Mac app. One-time Pro purchase, 14-day money-back guarantee.