Convert MKV to AAC Online
MKV files are a flexible open-source container that can hold unlimited video, audio, subtitle and chapter tracks. Converting to AAC gives you streaming, mobile audio, iTunes/Apple Music.
How to convert MKV to AAC
- Upload your MKV file. Drag it onto the box above or click to browse. Files up to 200 MB are accepted.
- Choose AAC as the output. The target format is pre-selected on this page — just press “Convert now”.
- Download the result. Conversion runs on our own server and the download starts as soon as it is ready. Your files are deleted automatically.
Why convert MKV to AAC?
People convert MKV to AAC mainly for compatibility. Supported by VLC, mpv, Plex and most desktop players, but not natively by some mobile devices. AAC, by contrast, is built for streaming, mobile audio, iTunes/Apple Music, and excellent support across phones, browsers and streaming platforms.
MKV vs AAC: key differences
| MKV | AAC | |
|---|---|---|
| File type | open container | lossy |
| Typical use | movies, TV rips, multi-audio and multi-subtitle releases | streaming, mobile audio, iTunes/Apple Music |
| Compatibility | Supported by VLC, mpv, Plex and most desktop players, but not natively by some mobile devices. | Excellent support across phones, browsers and streaming platforms. |
Tips for a clean MKV to AAC conversion
- Supported by VLC, mpv, Plex and most desktop players, but not natively by some mobile devices.
- Use the highest-quality source MKV you have — converting a compressed file again cannot restore lost detail.
- If you only need a smaller file, try a lower resolution or bitrate instead of a different format.
- Keep the original MKV until you have checked the converted AAC opens the way you expect.
Frequently asked questions
How do I convert MKV to AAC?
Upload your MKV file to the converter on this page, make sure AAC is selected as the output format and click “Convert now”. When the conversion finishes the download starts automatically.
Is this MKV to AAC converter free?
Yes — it is completely free and needs no account. Files up to 200 MB are accepted, and heavy use is rate-limited so the service stays available for everyone.
Will converting MKV to AAC reduce quality?
AAC uses lossy compression, so the converted file is re-encoded. Quality loss is minimal at sensible settings, but keep the original MKV if you may need to convert again later.
What is a MKV file?
MKV is a flexible open-source container that can hold unlimited video, audio, subtitle and chapter tracks. Its technical name is Matroska Video and it is typically used for movies, TV rips, multi-audio and multi-subtitle releases.
What is a AAC file?
AAC is the modern successor to MP3, delivering better quality at the same bitrate. Its technical name is Advanced Audio Coding and it is typically used for streaming, mobile audio, iTunes/Apple Music.
Can I convert MKV to AAC on my phone?
Yes. The converter runs in the browser on Android, iOS, Windows, macOS and Linux — no app installation is required.
Are my files kept on the server?
No. Uploaded files and converted results are deleted automatically a short time after the conversion finishes.