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CAF to AU - Online Audio Converter
Convert CAF to AU online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
Convert CAF to AU
Drop CAF audio here or click to select
CAF
AU (PCM 16-bit)
About CAF to AU
Convert CAF to AU. CAF is Apple's 64-bit container for large recordings beyond WAV limits. AU is Sun's simple container, usually holding 8 kHz telephony audio. Headers are minimal; verify sample rate after conversion..
Why convert CAF to AU?
- Larger files than lossy shares with AU uncompressed quality.
- Keep quality where supported.
- Private, no upload - runs in your browser.
CAF vs AU
| Codec | PCM 16-bit | PCM 16-bit |
|---|---|---|
| Compression | uncompressed | uncompressed |
| Sample behavior | Full quality kept | Full quality kept |
| Typical use | CAF is Apple's 64-bit container for large recordings beyond WAV limits. | AU is Sun's simple container, usually holding 8 kHz telephony audio. |
When not to convert CAF to AU
- Skip AU for the smallest share: lossless output stays large, so prefer a lossy target when sending CAF files.
- Keep a master copy: repeated exports stack small losses, so archive CAF before batch AU shares.
Limits
Starting point: CAF - CAF is Apple's 64-bit container for large recordings beyond WAV limits. Few Windows tools open it; convert WAV for sharing. Headers are minimal; verify sample rate after conversion. Encode AU (PCM 16-bit) from CAF 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.
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FAQ
How do I convert CAF to AU?
Drop your CAF file onto this page, choose quality and codec settings, then click Convert. The result downloads as AU instantly. All processing runs in your browser.
What codec is used for AU?
The default codec for AU is PCM 16-bit. 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.