Step 1: Supply your MKV files using the button above or by haul and lay.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Get your converted M4A files.
MKV to M4A Conversion FAQ
How do I extract the audio from a MKV as M4A?
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Upload the MKV file and the converter demuxes the audio track, then re-encodes it as M4A. No re-encoding of the video happens — only the audio stream is processed, which keeps it fast even on long videos.
Is the MKV to M4A conversion reversible?
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You can convert the M4A back to MKV on this site. If either format involved is lossy, the round-trip is not bit-perfect even though it is visually or audibly close.
What output quality should I expect from MKV to M4A?
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Default settings target broadcast / web quality — visually identical to the source for most viewers. For archival use, pick the highest quality option in the converter settings.
Is converting MKV to M4A a second round of lossy compression?
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Yes, and it is worth planning around. Both formats are lossy, so the M4A encoder is working from audio that has already been through one psychoacoustic pass, and its own decisions compound the first set. At 192 kbps or above the result is still transparent for most listening. If you have a lossless master anywhere, encoding the M4A from that instead avoids the double pass entirely. MKV is codec-agnostic: H.264, HEVC, VP9 and AV1 video sit happily beside AAC, FLAC, Opus, DTS or Dolby audio in the same file. An M4A holds AAC in most cases, or Apple Lossless (ALAC) when it came from a lossless rip.
Can I tag the M4A with artist and album information?
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Yes, and it is a genuine gain over MKV, which has nowhere dependable to store any of it. M4A carries title, artist, album, year, track number and embedded cover art in the container itself, so a music library files it correctly without a manual pass. M4A keeps rich iTunes-style metadata, chapters and artwork intact, and is the native audio format across every Apple device.
Is there a file-size limit when converting MKV to M4A?
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Free conversions have a size limit per file, set by the type of file, and the page tells you when a file is over it. A paid plan removes that limit, so much larger files can be converted.
Can I batch-convert several MKV files to M4A at once?
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Several files in one job need a paid plan. Free use is one file per conversion, one conversion an hour. On a paid plan you can add several files to one job, then download each result on its own or all of them in one ZIP.
What happens to my MKV files after the conversion?
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Uploaded files are processed on our own conversion servers, nobody looks at them, and they are not shared. The upload and the converted file are both deleted automatically about 24 hours after the conversion, which leaves time to download the result. See /privacy/ for the full policy.
What apps can play a M4A file?
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M4A plays in most music players, browsers, and media libraries. iTunes / Apple Music, VLC, Foobar2000, and phone media apps handle it natively.
Do I need to install software to convert MKV to M4A?
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No. The converter runs entirely in your browser plus our cloud — no plugin, no install, no admin rights. It works on Windows, macOS, Linux, ChromeOS, iOS, and Android.
Do I need an account to convert MKV to M4A?
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Yes. One conversion an hour is free, with no account needed, for a file within the free size limit. A paid plan removes the hourly limit and the size limit, and lets you add several files to one job.
Is there an API for MKV to M4A conversion?
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Yes. Every conversion this site offers is also exposed via a JSON API — see /api/ for endpoints, authentication, and rate limits. MKV to M4A is one of the supported pairs.
