Pull the audio out of an MKV video as an M4A. It is converted in your browser, so the file never leaves your device.
Drop MKV files here
or choose from your computer paste with Ctrl V
from Photos or Files
Ready · other file types work too0 bytes uploaded, ever
Drop MKV (Matroska) files onto the box above, or click it to choose them. ToAny reads the file's contents to detect the type, so a wrong extension does not matter.
Press Convert. Open Options first if you want to change the defaults. The work happens in this tab and can take a while for large files.
Save the M4A, or download everything as one ZIP if you converted several files.
The MKV to M4A converter is part of this page and runs inside your browser. Your videos are never sent to ToAny or to anyone else.
Nothing has to travel to a server and back, so work starts the moment you press Convert. How long it takes depends on your device and the size of the file.
No sign-up, no email address and no watermark. Add several files and download them together as a ZIP.
MKV does not play on iPhones, in QuickTime or in most browsers and editors. M4A sounds better than MP3 at the same file size and is native to Apple devices. MKV is at home in films with several audio and subtitle tracks; M4A is the usual choice for music and voice memos on Apple devices. The M4A contains the soundtrack only; the picture is dropped.
The defaults suit most files. Under Options you can choose the bitrate and trim the start and end. This is demanding work for a browser: a long or high-resolution file can take several minutes, and your device does all of it, so keep the tab open.
The conversion uses your browser's own video and audio codecs (WebCodecs), with hardware acceleration where the device has it; the file is read from disk as it goes and can be up to 2 GB. Where the browser lacks a codec, the page falls back to the compatibility engine. M4A is written at 192 kbps unless you choose another bitrate.
MKV is an open container that can hold practically any video and audio format plus multiple subtitle tracks. That flexibility is why it is popular for films, and why Apple devices and browsers refuse it.
Opens in VLC, Plex and many TVs; not iPhones, QuickTime or most browsers
MKV converterM4A is an MP4 file that contains only audio, usually AAC. iPhone Voice Memos and the iTunes Store use it. It sounds better than MP3 at the same size but is not accepted everywhere MP3 is.
Opens in Apple devices, Android, current browsers; some car stereos and older players do not
M4A converter| MKVMatroska video | M4AM4A audio | |
|---|---|---|
| Stands for | Matroska | MPEG-4 Audio |
| Type | Video container | Audio |
| Compression | Depends on what is inside | Lossy (AAC); lossless when it holds ALAC |
| Usually contains | Almost anything: H.264, HEVC, AV1, several audio and subtitle tracks | AAC, sometimes Apple Lossless |
| Introduced | 2002, by the Matroska project | The early 2000s, by the Moving Picture Experts Group (popularised by Apple) |
| Opens in | VLC, Plex and many TVs; not iPhones, QuickTime or most browsers | Apple devices, Android, current browsers; some car stereos and older players do not |
| Best for | Films with several audio and subtitle tracks | Music and voice memos on Apple devices |
| File extension | .mkv | .m4a |
No. The MKV to M4A conversion runs inside your browser, on your own phone or computer. The file is not sent to ToAny or to anyone else.
The soundtrack is re-encoded as M4A. M4A is lossy, but at a normal bitrate the difference is hard to hear. You can choose the bitrate under Options.
Yes. Add as many as you like, convert them together and download each result or all of them as one ZIP.
The steps are the same everywhere because ToAny runs in the web browser: open this page in a current version of Chrome, Edge, Safari or Firefox, add the MKV file, press Convert and save the M4A. There is nothing to install.
Yes. Files up to 2 GB are accepted. Beyond that the limit is your device's memory, since nothing is uploaded; a computer copes with large files better than a phone.