# Convert MKA to AU

> Convert MKA to AU online for free. Runs entirely in your browser, so your files never leave your device. Fast batch conversion, no sign-up, no watermarks.

URL: https://www.converterrr.com/mka-to-au

- Runs in the browser with FFmpeg (WASM): files are not uploaded, and no credits are used.
- Engines: FFmpeg (WASM) (browser), FFmpeg (cloud).
- API: available. `POST /api/v1/jobs` with `"output_format": "au"` (paid plans).
- More: [Audio converter](https://www.converterrr.com/audio-converter), [MKA converter](https://www.converterrr.com/mka-converter).

## How to convert MKA to AU

1. **Add your MKA files.** Drag and drop MKA files onto the converter, paste them, or click to browse. You can add several at once.
2. **Choose AU.** AU is already selected. Open Options if you want to change quality, size or metadata.
3. **Convert.** Click Convert. Your files are converted right in your browser in seconds.
4. **Download your AU.** Download each AU file, or everything at once as a ZIP.

## Good to know

- MKA files are typically used for multi-track and lossless audio, while AU is best for legacy Unix and Java applications.
- This conversion runs on FFmpeg (WASM), running locally in your browser — nothing is uploaded and it works even on slow connections.

## MKA vs AU

|  | MKA | AU |
| --- | --- | --- |
| Full name | Matroska Audio | Sun Audio |
| Type | Audio | Audio |
| Extensions | .mka | .au |
| MIME type | audio/x-matroska | audio/basic |
| Best for | multi-track and lossless audio | legacy Unix and Java applications |
| Properties | open standard | legacy format |

**MKA:** MKA is the audio-only Matroska container, able to hold any codec and multiple tracks.

**AU:** AU is a simple audio format introduced by Sun Microsystems, common on early Unix systems and Java.

The other way around: [convert AU to MKA](https://www.converterrr.com/au-to-mka).

## Related conversions

- [AU to MKA](https://www.converterrr.com/au-to-mka) (in the browser)
- [MKA to MP3](https://www.converterrr.com/mka-to-mp3) (in the browser)
- [MP3 to AU](https://www.converterrr.com/mp3-to-au) (in the browser)
- [MKA to WAV](https://www.converterrr.com/mka-to-wav) (in the browser)
- [MP4 to AU](https://www.converterrr.com/mp4-to-au) (in the browser)
- [MKA to M4A](https://www.converterrr.com/mka-to-m4a) (in the browser)
- [WAV to AU](https://www.converterrr.com/wav-to-au) (in the browser)
- [MKA to FLAC](https://www.converterrr.com/mka-to-flac) (in the browser)
- [MOV to AU](https://www.converterrr.com/mov-to-au) (in the browser)
- [MKA to AAC](https://www.converterrr.com/mka-to-aac) (in the browser)
- [M4A to AU](https://www.converterrr.com/m4a-to-au) (in the browser)
- [MKA to OGG](https://www.converterrr.com/mka-to-ogg) (in the browser)

## Convert MKA to other formats

[MKA to MP3](https://www.converterrr.com/mka-to-mp3), [MKA to WAV](https://www.converterrr.com/mka-to-wav), [MKA to M4A](https://www.converterrr.com/mka-to-m4a), [MKA to FLAC](https://www.converterrr.com/mka-to-flac), [MKA to AAC](https://www.converterrr.com/mka-to-aac), [MKA to OGG](https://www.converterrr.com/mka-to-ogg), [MKA to Opus](https://www.converterrr.com/mka-to-opus), [MKA to WMA](https://www.converterrr.com/mka-to-wma), [MKA to AIFF](https://www.converterrr.com/mka-to-aiff), [MKA to AMR](https://www.converterrr.com/mka-to-amr), [MKA to M4B](https://www.converterrr.com/mka-to-m4b), [MKA to AC3](https://www.converterrr.com/mka-to-ac3), [MKA to MP2](https://www.converterrr.com/mka-to-mp2), [MKA to WEBA](https://www.converterrr.com/mka-to-weba), [MKA to OGA](https://www.converterrr.com/mka-to-oga), [MKA to WV](https://www.converterrr.com/mka-to-wv), [MKA to TTA](https://www.converterrr.com/mka-to-tta)

## Convert other formats to AU

[MP3 to AU](https://www.converterrr.com/mp3-to-au), [MP4 to AU](https://www.converterrr.com/mp4-to-au), [WAV to AU](https://www.converterrr.com/wav-to-au), [MOV to AU](https://www.converterrr.com/mov-to-au), [M4A to AU](https://www.converterrr.com/m4a-to-au), [WebM to AU](https://www.converterrr.com/webm-to-au), [FLAC to AU](https://www.converterrr.com/flac-to-au), [MKV to AU](https://www.converterrr.com/mkv-to-au), [AAC to AU](https://www.converterrr.com/aac-to-au), [AVI to AU](https://www.converterrr.com/avi-to-au), [OGG to AU](https://www.converterrr.com/ogg-to-au), [WMV to AU](https://www.converterrr.com/wmv-to-au), [Opus to AU](https://www.converterrr.com/opus-to-au), [WMA to AU](https://www.converterrr.com/wma-to-au), [FLV to AU](https://www.converterrr.com/flv-to-au), [M4V to AU](https://www.converterrr.com/m4v-to-au), [MPEG to AU](https://www.converterrr.com/mpeg-to-au), [3GP to AU](https://www.converterrr.com/3gp-to-au), [AIFF to AU](https://www.converterrr.com/aiff-to-au), [AMR to AU](https://www.converterrr.com/amr-to-au), [MPG to AU](https://www.converterrr.com/mpg-to-au), [TS to AU](https://www.converterrr.com/ts-to-au), [M4B to AU](https://www.converterrr.com/m4b-to-au), [MTS to AU](https://www.converterrr.com/mts-to-au)

## MKA to AU: frequently asked questions

### How do I convert MKA to AU?

Drop your MKA file onto the converter above, make sure AU is selected, and click Convert. When it's done, download the AU file — it usually takes a few seconds.

### Is it safe to convert MKA to AU here?

Yes. MKA to AU conversion happens entirely inside your browser using WebAssembly, so your file is never uploaded to any server.

### Is the MKA to AU converter free?

Yes — free with no watermark. Signed-out visitors can convert 25 files a day, and a free account raises that to 250.

### Will converting MKA to AU reduce quality?

No — AU preserves the content of your MKA file as faithfully as the format allows.

### Can I convert multiple MKA files at once?

Yes. Add up to 5 files at a time without an account, 10 with a free account and up to 500 on paid plans, then download them individually or as a single ZIP.

### Can I convert AU back to MKA?

Yes — use our AU to MKA converter. Note that converting back and forth between formats can't recover detail lost to lossy compression.