# Convert RM to AU

> Convert RM to AU online for free in seconds. Files are processed in a secure, isolated sandbox and deleted automatically. No sign-up, no watermarks.

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

- Runs in an isolated cloud sandbox with FFmpeg: files are deleted automatically, and the job uses cloud credits.
- Engines: FFmpeg (cloud).
- API: available. `POST /api/v1/jobs` with `"output_format": "au"` (paid plans).
- More: [Video converter](https://www.converterrr.com/video-converter), [RM converter](https://www.converterrr.com/rm-converter).

## How to convert RM to AU

1. **Add your RM files.** Drag and drop RM 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. Files are processed in a secure cloud sandbox and are usually ready in seconds.
4. **Download your AU.** Download each AU file, or everything at once as a ZIP.

## Good to know

- Only the audio track is kept — the result is an AU file you can play anywhere. Use Options to pick a bitrate.
- RM files are typically used for archived streaming video from the late 1990s, while AU is best for legacy Unix and Java applications.
- This conversion runs on FFmpeg in an isolated cloud sandbox. Files are encrypted in transit and deleted automatically.

## RM vs AU

|  | RM | AU |
| --- | --- | --- |
| Full name | RealMedia | Sun Audio |
| Type | Video | Audio |
| Extensions | .rm | .au |
| MIME type | application/vnd.rn-realmedia | audio/basic |
| Best for | archived streaming video from the late 1990s | legacy Unix and Java applications |
| Properties | legacy format, proprietary | legacy format |

**RM:** RealMedia was RealNetworks' streaming format in the early internet era.

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

## Related conversions

- [RM to MP4](https://www.converterrr.com/rm-to-mp4) (cloud)
- [MP3 to AU](https://www.converterrr.com/mp3-to-au) (in the browser)
- [RM to MP3](https://www.converterrr.com/rm-to-mp3) (cloud)
- [MP4 to AU](https://www.converterrr.com/mp4-to-au) (in the browser)
- [RM to WebP](https://www.converterrr.com/rm-to-webp) (cloud)
- [WAV to AU](https://www.converterrr.com/wav-to-au) (in the browser)
- [RM to MOV](https://www.converterrr.com/rm-to-mov) (cloud)
- [MOV to AU](https://www.converterrr.com/mov-to-au) (in the browser)
- [RM to GIF](https://www.converterrr.com/rm-to-gif) (cloud)
- [M4A to AU](https://www.converterrr.com/m4a-to-au) (in the browser)
- [RM to WAV](https://www.converterrr.com/rm-to-wav) (cloud)
- [WebM to AU](https://www.converterrr.com/webm-to-au) (in the browser)

## Convert RM to other formats

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

## 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)

## RM to AU: frequently asked questions

### How do I convert RM to AU?

Drop your RM 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 RM to AU here?

Yes. Your file is sent over an encrypted connection to an isolated sandbox that's created for your job only, then both the original and the result are deleted automatically.

### Is the RM to AU converter free?

Yes. Cloud conversions like this one use credits, and you get free credits every day (3 without an account, 10 with a free account).

### Will converting RM to AU reduce quality?

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

### Can I convert multiple RM 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.