To convert MKV to AAC, select or drop your .mkv file above, check that AAC is chosen as the output, and click Convert. This conversion runs on our server, and your files are deleted 72 hours later.
What is an MKV file?
MKV – Matroska video. MKV (Matroska) is a flexible open container that can hold any number of video, sound and subtitle tracks. Media players love it; phones and some TVs do not. Converting makes a new file: the video is decoded and encoded again, so converting from a format that lost detail never brings it back.
MKV Converter →What is an AAC file?
AAC – AAC audio. AAC is the successor of MP3: it sounds better at the same size. A bare .aac file is a stream of AAC frames; the usual home of AAC is the M4A file. Converting makes a new file: the sound is decoded and written again, so converting from a lossy format never brings back what was lost.
AAC Converter →How to convert MKV to AAC
- Click Select File, or drop your .mkv files anywhere on this page. You can add several at once.
- Check that AAC is chosen as the output format. On this page it is picked for you.
- Click Convert. When a file has to go to our server, the button says Upload and convert instead.
- Click Download next to each file when it's done.
MKV vs AAC: how they compare
| MKV | AAC | |
|---|---|---|
| Layout | Moving pictures and sound | A stream of sound |
| Editable | In video editors | In audio editors |
| Created by | Matroska team, 2002 | MPEG, 1997 |
| Best for | Films with several sound tracks and subtitles | Music on phones and streaming |
Good to know
- The sound of the video is made into an AAC file; the pictures are left out. Only the first sound track is converted.
Frequently asked questions
Is converting MKV to AAC free?
Yes. Everyone gets 25 free credits a day, with no account needed. Conversions on our server use one credit per started minute of work, so most cost a single credit. Credits reset at midnight UTC.
Are my MKV files uploaded anywhere?
This conversion runs on our server, because converting video needs ffmpeg, which does not run in a browser. Your file is sent over an encrypted connection, and both it and the result are deleted 72 hours after the conversion. The server has no internet access while it works on your file.
How large can the MKV file be?
Up to 1 GB per file. This conversion runs on our server, which accepts files up to that size.
Will the AAC look the same as the MKV?
Only the sound is kept: the pictures are left out, and the AAC is made from the first sound track.
Can I convert several MKV files at once?
Yes. Add as many files as you like; they are converted one after another, and each one gets its own Download button.
Convert MKV to other formats
- MKV Converter
- MKV to AIFF Converter
- MKV to AVI Converter
- MKV to FLAC Converter
- MKV to FLV Converter
- MKV to GIF Converter
- MKV to M4A Converter
- MKV to MOV Converter
- MKV to MP3 Converter
- MKV to MP4 Converter
- MKV to WAV Converter
- MKV to WEBM Converter
- MKV to WEBP Converter
- MKV to WMA Converter
- MKV to WMV Converter
Convert other files to AAC
- Convert to AAC
- MP4 to AAC Converter
- MOV to AAC Converter
- AVI to AAC Converter
- WEBM to AAC Converter
- WMV to AAC Converter
- FLV to AAC Converter
- MP3 to AAC Converter
- WAV to AAC Converter
- M4A to AAC Converter
- FLAC to AAC Converter
All video formats
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