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Convert AU to CAF

Convert AU to CAF format — 100% browser-based, no upload required.

2 cores · low tier

Drop a file here or click to select

Format will be auto-detected

About these formats

Source

AU

Sun/NeXT Audio

Simple audio format from Sun Microsystems. Originally used in Unix systems and Java audio. Typically stores µ-law compressed audio.

Best for

Unix/Java audioLegacy systemsSimple audio storage

Advantages

  • + Simple format
  • + Java support
  • + Compact for telephony

Limitations

  • Outdated
  • Low quality
  • Limited use
Target

CAF

Core Audio Format

Apple's flexible audio container supporting any codec. Designed to overcome limitations of older formats like AIFF and WAV.

Best for

macOS/iOS audioProfessional audioApple development

Advantages

  • + Any codec
  • + No size limits
  • + 64-bit offsets
  • + Apple native

Limitations

  • Apple-only
  • Limited third-party support
  • Niche format