Only want the audio inside an MKV?
Concerts, talks and rips carry fine soundtracks; this lifts them into an M4A without touching the video.
Runs in your browser. Your file never leaves your computer.
- AAC insideInstant lossless copy
- Else256 kbps AAC re-encode
- Multi-audioPrimary track is used
- TrimStart and end points offered
Inside many MKVs sits audio worth keeping on its own: a concert recording, a lecture, commentary. Extraction reads the primary audio track and, when it is AAC, copies it losslessly into an M4A in seconds; other codecs re-encode at 256 kbps. The result is phone-sized and player-friendly. Choosing a specific track from multi-audio MKVs is not offered, the primary track is taken, and as ever the file never leaves your browser.
Questions
Which track do I get from a multi-language file?
The primary one, as the container marks it. Per-track selection belongs to specialist tools for now.
Is quality identical to the video's soundtrack?
For AAC sources, bit-identical via the copy path. Others re-encode at a transparent 256 kbps.
Local processing even for big files?
Yes, extraction streams and never uploads.
Related conversions
- MKV to MP4The container TVs and phones refuse, repackaged or re-encoded as the one they accept. Often instant.
- MKV to WebMContent bound for browser playback, re-encoded with hardware VP9 or AV1 where the machine offers it.
- WAV to M4AAAC at 256 kbps: better sound per megabyte than MP3, native on every Apple device, fine everywhere else.
- AIFF to M4AFrom a studio-size file to a share-size one: AAC at 256 kbps, native on the Apple gear the AIFF came from.
- FLAC to M4AYour lossless library, made playable on iPhones and everything else, at 256 kbps AAC.
- MP3 to M4AWhen a workflow or app insists on M4A. Honest note: this cannot make the MP3 sound better, only fit better.
Part of convert video in your browser. Every other conversion is on the conversions index.