MKV to M4A Converter
Pull the audio track out of a MKV file and save it as M4A — no upload, done entirely on your device. Drop a MKV file below to get started.
Drop files, or click to browse
MKV files only — processed one at a time
Frequently asked questions
Is this MKV to M4A converter free?+
Yes, with no watermark, no account, and no daily limit.
Is my audio file uploaded anywhere?+
No — conversion runs locally using your browser's own built-in media codecs, entirely inside your browser tab.
Will I lose audio quality?+
Converting between compressed formats can lose a small amount of quality; converting to a lossless format like WAV or FLAC won't.
Is there a maximum file size?+
There's no fixed file-size limit since nothing is uploaded to a server. Processing time scales with the track's length rather than a hard cutoff.
How do I convert MKV to M4A?+
Drop your MKV file into the box above — it's decoded and re-encoded as M4A automatically, with a download ready in seconds.
About MKV and M4A
What is MKV?
MKV (Matroska) is a flexible open container that can hold multiple audio tracks, subtitles, and chapters alongside the video.
Full MKV format guide →What is M4A?
M4A is an audio-only MPEG-4 container, most often holding AAC audio — it's what Apple Music and Voice Memos save by default.
Full M4A format guide →MKV and M4A solve different problems. MKV is great for archiving video with multiple language tracks or subtitles, but M4A pulls ahead when you need good compression efficiency. If that's the situation you're in, converting is worth it.
How it works
- 1
Drop your file in
Drag your audio onto the box above, or click it to browse — there's no account to create and no upload to wait on.
- 2
Pick your settings
The output format is already set for this page — just adjust any extra options shown, if there are any.
- 3
Download the result
Your browser processes everything locally and hands you a download link the moment it's done — nothing was ever sent to a server.
Is it private?
Everything happens locally, inside this browser tab. Your audio is read from disk, processed with WebAssembly running on your own device, and handed back to you as a download — it's never transmitted anywhere, so there's nothing to intercept and nothing stored on a server.
Common use cases
- Voice memos and Apple Music downloads
- Podcasts
- Prepping a podcast episode for a hosting platform
- Fitting a voice memo under a messaging app's size limit
Supported formats
This is one of many pairings the audio toolkit handles. In total it covers:
Related conversions
Format details
About MKV files+
MKV (Matroska) is a flexible open container that can hold multiple audio tracks, subtitles, and chapters alongside the video.
Matroska was designed from the ground up as an open, extensible container, meaning a single MKV file can bundle several audio tracks (say, multiple languages), several subtitle tracks, and chapter markers, all switchable during playback — something older containers like AVI and even MP4 handle less gracefully. That flexibility made it the format of choice for archiving TV shows and films with multiple language options, though a handful of phones and streaming devices still expect MP4 and need MKV converted first.
How to open a MKV file
Opens readily in VLC Media Player. For real editing, use DaVinci Resolve, Adobe Premiere Pro (with an extension).
Good for
- supports multiple audio/subtitle tracks in one file
- open format, no licensing fees
Watch out for
- not natively supported by some phones and TVs without an app
About M4A files+
M4A is an audio-only MPEG-4 container, most often holding AAC audio — it's what Apple Music and Voice Memos save by default.
M4A is essentially an MPEG-4 container that's been restricted to audio only, and it's the extension Apple uses by default across iTunes downloads, Apple Music, GarageBand, and Voice Memos. In almost every practical case it holds AAC-encoded audio, so its quality and compression characteristics are effectively the same as AAC — it's really a matter of which extension a given piece of Apple software happened to save the file with.
How to open a M4A file
Opens readily in Any modern media player, iTunes/Apple Music, Most web browsers. For real editing, use Audacity (free), GarageBand.
Good for
- good compression efficiency
- native format across Apple apps
Watch out for
- occasionally needs converting for apps that only expect MP3
Need a different format? Try the full Audio Converter, or explore all audio tools.