# Convert AU to MKA

> Convert AU to MKA 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/au-to-mka

- 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": "mka"` (paid plans).
- More: [Audio converter](https://www.converterrr.com/audio-converter), [AU converter](https://www.converterrr.com/au-converter).

## How to convert AU to MKA

1. **Add your AU files.** Drag and drop AU files onto the converter, paste them, or click to browse. You can add several at once.
2. **Choose MKA.** MKA 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 MKA.** Download each MKA file, or everything at once as a ZIP.

## Good to know

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

## AU vs MKA

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

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

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

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

## Related conversions

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

## Convert AU to other formats

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

## Convert other formats to MKA

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

## AU to MKA: frequently asked questions

### How do I convert AU to MKA?

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

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

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

### Is the AU to MKA 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 AU to MKA reduce quality?

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

### Can I convert multiple AU 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 MKA back to AU?

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