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MKV to M4A

MKV to M4A Converter

Drop a MKV file into the converter below and download a M4A seconds later. No account, no watermark, no file size limit. Extract the audio track from MKV and save it as M4A — useful for podcasts, music rips, and feeding audio-only pipelines.

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One-line MCP install. Runs native ffmpeg locally — ~5–10× faster than the browser version.
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How to convert MKV to M4A
  1. 1
    Drop your file
    Drag & drop a .mkv file into the zone below, or click to browse. Multiple files work too.
  2. 2
    Convert in browser
    Hit Convert — FFmpeg-WebAssembly transcodes your MKV into M4A locally. Nothing is uploaded.
  3. 3
    Download result
    Save the converted .m4a file to your device. Repeat with more files or pick a different target format.
Why this converter
Free forever
No paywalls, no sign-up.
No watermarks
Your output is clean — no logos, no overlays.
100% private
Files are converted on your device, never uploaded.
Works offline
After first load, conversion works without internet.
Batch & multi-file
Drop a whole folder — we'll ZIP the output.
Open source
Review, fork, or host the code yourself.
FAQ

A .m4a file is a AAC audio in an MP4 container, standard on Apple devices. It encodes sound data for playback and streaming.

Extract the audio track from MKV and save it as M4A — useful for podcasts, music rips, and feeding audio-only pipelines.

Yes — conversion runs entirely inside your browser using WebAssembly. Your files never leave your device, never touch our servers, and we have no way to see or store them. Open DevTools → Network tab while converting; you'll see zero upload traffic.

Video and audio conversion works on iOS 16.4 and later (requires SharedArrayBuffer support). Older iPhones can still convert images without issues.

There's no hard limit we enforce, but the converter is bounded by your device's RAM. Phones typically handle files up to ~500MB comfortably; laptops can push into multi-GB territory. If your file is very large, try splitting it first.

Most online converters upload your file to their servers, process it there, and let you download the result. That means trusting them with potentially sensitive media. This tool skips the server entirely — the same FFmpeg code runs in your browser via WebAssembly, so nothing is uploaded, nothing is stored, and it's free forever.

Related converters
MKV→GIF›MKV→MP4›MKV→WebM›MKV→MOV›MP4→M4A›WebM→M4A›