All Tools
[ audio bench ]
AU to WebA - Online Audio Converter
Convert AU to WebA online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
Convert AU to WebA
Drop AU audio here or click to select
AU
WebA (Opus (WebM))
About AU to WebA
Convert AU to WebA. AU is Sun's simple container, usually holding 8 kHz telephony audio. The WebA target packages Opus audio for web playback. Same payload as WebA under the converter target name..
Why convert AU to WebA?
- Smaller files with WebA lossy compression.
- Keep quality where supported.
- Private, no upload - runs in your browser.
AU vs WebA
| Codec | PCM 16-bit | Opus (WebM) |
|---|---|---|
| Compression | uncompressed | lossy |
| Sample behavior | Full quality kept | Quality set by bitrate |
| Typical use | AU is Sun's simple container, usually holding 8 kHz telephony audio. | The WebA target packages Opus audio for web playback. |
When not to convert AU to WebA
- Skip WebA for archival masters: lossy compression discards detail, so keep the AU original.
- Keep a master copy: repeated exports stack small losses, so archive AU before batch WebA shares.
Limits
Starting point: AU - AU is Sun's simple container, usually holding 8 kHz telephony audio. Headers are minimal; verify sample rate after conversion. Same payload as WebA under the converter target name. Encode WebA (Opus (WebM)) from AU at 256k for music or 128k for speech, starting from the master.
How conversion works
Conversion runs entirely in your browser with FFmpeg WASM. Files never leave your device.
Related conversions
FAQ
How do I convert AU to WebA?
Drop your AU file onto this page, choose quality and codec settings, then click Convert. The result downloads as WebA instantly. All processing runs in your browser.
What codec is used for WebA?
The default codec for WebA is Opus (WebM). You can change audio parameters in Advanced mode.
How do you store my files?
We do not store any processed audio. All conversion happens entirely in your browser using FFmpeg WASM.