Convert MKV to AAC
Free, fast and secure — convert MKV to AAC right in your browser.
Pull the audio out of your MKV as AAC
Converting MKV to AAC extracts a clean audio track from your video, giving you a compact AAC audio you can play, share or add to a playlist without the video.
How to convert MKV to AAC
- 1 Drop your MKV file into the converter above.
- 2 It is converted to AAC automatically — no settings to fiddle with.
- 3 Download your new AAC file instantly.
MKV vs AAC
| Feature | MKV | AAC |
|---|---|---|
| Compression | Lossy | Lossy |
| Transparency | No | No |
| Animation | Yes | No |
| MIME type | video/x-matroska | audio/aac |
| Best for | Archiving high-quality video with multiple tracks — converted to MP4 for everyday playback. | Streaming and modern playback where quality-per-byte beats raw compatibility. |
About the formats
Matroska video
MKV (Matroska) is a flexible open container that can bundle many video, audio and subtitle tracks in one file. It is popular for high-quality archives and media libraries.
Strengths
- Holds multiple audio/subtitle tracks
- Open and future-proof
- Great for high-quality storage
Limitations
- Not supported on many phones/browsers
- Often needs converting to play
- Larger than streaming formats
Best for: Archiving high-quality video with multiple tracks — converted to MP4 for everyday playback.
AAC audio
AAC is the successor to MP3, offering better sound at the same bitrate. It is the standard for streaming services, YouTube and Apple devices.
Strengths
- Better quality than MP3 at equal size
- Standard for streaming platforms
- Wide modern-device support
Limitations
- Lossy compression
- Slightly less universal than MP3
- No lossless mode
Best for: Streaming and modern playback where quality-per-byte beats raw compatibility.