CAF
→
AU

Convert CAF to AU Online

Convert CAF to AU online. Start with free daily conversions, no install, no watermarks, and visible job status.

CAF to AU Converter

Upload your CAF file to convert it to AU format

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How to Convert CAF to AU

Follow these simple steps

1

Step 1: Upload Your File

Upload your CAF file by dragging and dropping or clicking to browse

2

Step 2: Select Output Format

AU is automatically selected as the output format

3

Step 3: Start Conversion

Click the Convert button to start the conversion

4

Step 4: Download Result

Download your converted AU file when ready

Convert CAF to AU - Complete Guide

Converting CAF to AU stays in the audio file family but changes the traits that decide size, quality, transparency, editability, or device support. CAF is a audio format. Core Audio Format. AU is a audio format. Sun audio. Below is what actually changes in a CAF→AU conversion, what is preserved, and when AU is the better choice than keeping CAF.

What changes when you convert CAF to AU

  • The audio is re-encoded into the AU format. Because re-encoding is not free, start from the highest-quality source you have and keep quality settings high.
  • Expect a smaller output file: AU is typically more space-efficient than CAF for the same content.

About the CAF format

CAF (Core Audio Format) is Apple's flexible audio container that supports various audio codecs and features like unlimited file size.

  • Full name: Core Audio Format
  • Developer: Apple
  • Compression: mixed
  • Opens with: Logic Pro, GarageBand, QuickTime, FFmpeg

Where CAF is strong: Apple container that holds very large or long recordings; supports many codecs including uncompressed PCM; no practical file-size limit unlike WAV.

Typical CAF uses: macOS and iOS audio production, long-form recordings beyond WAV limits, Logic Pro and Core Audio workflows.

About the AU format

AU is a audio format. Sun audio.

  • Compression: mixed
  • Opens with: VLC, Audacity, FFmpeg

Where AU is strong: simple legacy format from Sun/NeXT systems; stores uncompressed PCM or companded mu-law/A-law audio; easy to read and parse.

Typical AU uses: legacy Unix and Java system sounds, older audio archives.

What AU keeps

  • AU adds: simple legacy format from Sun/NeXT systems.

Things to watch out for

  • One AU limitation to keep in mind: dated format rarely used today.

When to convert CAF to AU

  • Convert CAF to AU for legacy Unix and Java system sounds.
  • Convert CAF to AU for older audio archives.
  • Pick AU when you need stores uncompressed PCM or companded mu-law/A-law audio.

CAF vs AU — format comparison

A quick side-by-side of the structural differences between CAF and AU, so you can confirm this is the right conversion for your file:

AttributeCAFAU
TypeAudio fileAudio file
CompressionFlexible (lossy or lossless)Flexible (lossy or lossless)
Web-friendlyNoNo
Typical file sizeLargeMedium
Best formacOS and iOS audio productionlegacy Unix and Java system sounds

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Need the opposite conversion?

Convert AU to CAF

Other CAF Conversions

More formats you can convert CAF to

Convert CAF to MP3Convert CAF to WAVConvert CAF to AACConvert CAF to OGGConvert CAF to FLACConvert CAF to M4AConvert CAF to WMAConvert CAF to AIFFConvert CAF to OPUSConvert CAF to AC3Convert CAF to AMRConvert CAF to MKAConvert CAF to WVConvert CAF to SPXConvert CAF to OGAConvert CAF to DTSConvert CAF to MP2
View all CAF conversions →

Convert to AU

Other formats you can convert to AU

Convert MP3 to AUConvert WAV to AUConvert AAC to AUConvert OGG to AUConvert FLAC to AUConvert M4A to AUConvert WMA to AUConvert AIFF to AUConvert OPUS to AUConvert AC3 to AUConvert AMR to AUConvert MKA to AUConvert WV to AUConvert SPX to AUConvert OGA to AUConvert DTS to AUConvert MP2 to AU
View all AU conversions →

CAF to AU FAQ

Converting CAF to AU preserves the content faithfully; output also depends on the source file and any settings you choose.
Upload your CAF file, confirm AU as the output format, and click Convert. Job status is shown while the file is processed, then you can download the AU result.
Yes. You can start with free daily conversions, with no signup required for your first jobs and no watermarks on the output. Accounts and paid plans are available for higher-volume work.
No. The CAF to AU conversion runs in your browser on any device — Windows, Mac, Linux, iOS, or Android — with uploads and downloads over HTTPS.
CAF (Core Audio Format) is an audio file format. CAF files can be played with various audio players and media applications.
Upload your CAF audio file to the converter, select your desired output format, and click Convert. The job status appears while the audio is processed.
You can start with free daily conversions. Accounts and paid plans are available for higher-volume work, and downloaded files are not watermarked.
You can convert CAF to proof-backed audio outputs such as MP3, WAV, AAC, OGG, FLAC, M4A, WMA, AIFF, OPUS, AC3, AMR, AU, CAF, MKA, WV, SPX, OGA, DTS, and MP2 when the source format is public-supported.
Yes! Our CAF converter works on any device including smartphones and tablets.
Choose the bitrate or output setting that fits your file-size and playback needs. Lossy formats can reduce detail compared with the source.

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