AU to OGG Converter
Processing entirely on your device — large files may take a moment.
AU is the µ-law audio format of old Unix systems and Java applets — tiny mono files from another era. Ogg is the standard choice for open-source software, game engines and free platforms.
iLoveConverter processes everything locally on your computer, which makes it private and fast: no upload wait, no server storage, no limits. Add as many files as you like — batch conversion is built in.
How AU compares to OGG
| AU | OGG | |
|---|---|---|
| Compression | µ-law or PCM | Lossy Vorbis (Opus possible) |
| Quality | Mono voice-grade (µ-law) | Better than MP3/bitrate |
| Compatibility | Legacy Unix tools | Players yes, devices mixed |
| Best for | Old system sounds and recordings | Games and open-source audio |
How to convert AU to OGG
- 1
Select your files
Drag & drop your AU files onto the area above, or click to browse. You can add multiple files at once for batch conversion.
- 2
Convert instantly
Click "Convert to OGG". The conversion runs entirely inside your browser using WebAssembly — no upload, no queue, no waiting.
- 3
Download results
Download each converted OGG file individually, or grab everything at once as a ZIP archive.
About the AU format
AU is Sun Microsystems' audio format from the Unix workstation age: a small header followed by µ-law (or PCM) samples. Java's applet era shipped it everywhere, and old Unix sound tooling still emits it.
Modern players increasingly skip it. Converting AU to WAV preserves the samples bit-for-bit while moving the file into universal territory — the standard rescue path for system sounds and old recordings.
+ Strengths
- ✓Simple, lossless sample storage
- ✓Native to old Unix/Java tooling
! Limitations
- −µ-law flavor sounds dated and mono
- −Dropped by modern players
About the OGG format
OGG usually means the Ogg container carrying Vorbis audio — the open-source answer to MP3 from 2000. Vorbis delivered better quality than MP3 at the same bitrate and cost nothing to license, so it spread through game engines (Valve titles), open-source apps and streaming startups. It is technically a container format, so OGG files can also hold Opus or FLAC.
Hardware support was always its ceiling: phones and car systems were slow to add Vorbis, and Opus (also Ogg-based) has since surpassed it technically. Today OGG/Vorbis is best understood as a game-audio and open-ecosystem format.
+ Strengths
- ✓Royalty-free with good quality-per-bit
- ✓Native in game engines and open-source stacks
- ✓Container flexibility (Vorbis/Opus/FLAC)
! Limitations
- −Patchy hardware and car support
- −Technically surpassed by Opus
Why convert AU to OGG?
Converting makes sense where the strengths of OGG meet what AU cannot give you. Royalty-free with good quality-per-bit Meanwhile µ-law flavor sounds dated and mono One pass through the converter above puts your file on the right side of that trade-off.
Frequently asked questions
Is this AU to OGG converter really free?
Yes — completely free, with no sign-up, no watermark and no daily conversion limits. The site is supported by advertising.
Are my files uploaded to a server?
No. The conversion runs entirely inside your browser using WebAssembly, so your files never leave your device — that is what makes it instant and private.
Does it work on Windows, Mac, iPhone and Android?
Yes. Anything with a modern browser works: Windows, macOS, Linux, Android and iOS. No software installation is required.
Is there a file size limit for AU to OGG?
The only limit is your device's memory, since nothing is uploaded. Files up to a few hundred megabytes work fine on a modern desktop browser; very large files simply take a little longer.
Will converting AU to OGG reduce audio quality?
If OGG is lossless, the output contains everything the AU file contains — no further loss is added. If OGG is lossy, one recompression pass is unavoidable; the quality slider controls how much. Loss that already happened in the source file can never be undone by converting.
Can I convert a whole folder of AU files?
You can select many files at once and they are processed in a single batch. Output files land in one ZIP download when there is more than one result.