AIFF
→
AU

Convert AIFF to AU Online

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

AIFF to AU Converter

Upload your AIFF file to convert it to AU format

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How to Convert AIFF to AU

Follow these simple steps

1

Step 1: Upload Your File

Upload your AIFF 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 AIFF to AU - Complete Guide

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

What changes when you convert AIFF 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 AIFF for the same content.

About the AIFF format

AIFF (Audio Interchange File Format) is Apple's uncompressed audio format, similar to WAV. It offers lossless audio quality for professional applications.

  • Full name: Audio Interchange File Format
  • Developer: Apple
  • Compression: None (uncompressed)
  • Opens with: Logic Pro, GarageBand, most players

Where AIFF is strong: uncompressed, studio-quality audio on Apple platforms; no generation loss.

Typical AIFF uses: Apple audio editing, high-quality source files.

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 AIFF to AU

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

AIFF vs AU — format comparison

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

AttributeAIFFAU
TypeAudio fileAudio file
CompressionUncompressedFlexible (lossy or lossless)
Web-friendlyNoNo
Typical file sizeLargeMedium
Best forApple audio editinglegacy Unix and Java system sounds

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Need the opposite conversion?

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Other AIFF Conversions

More formats you can convert AIFF to

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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 OPUS to AUConvert AC3 to AUConvert AMR to AUConvert CAF to AUConvert MKA to AUConvert WV to AUConvert SPX to AUConvert OGA to AUConvert DTS to AUConvert MP2 to AU
View all AU conversions →

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AIFF to AU FAQ

Converting AIFF to AU preserves the content faithfully; output also depends on the source file and any settings you choose.
Upload your AIFF 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 AIFF to AU conversion runs in your browser on any device — Windows, Mac, Linux, iOS, or Android — with uploads and downloads over HTTPS.
AIFF (Audio Interchange File Format) is an audio file format. AIFF files can be played with various audio players and media applications.
Upload your AIFF 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 AIFF 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 AIFF 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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