AU
→
AIFF

Convert AU to AIFF Online

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

AU to AIFF Converter

Upload your AU file to convert it to AIFF format

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How to Convert AU to AIFF

Follow these simple steps

1

Step 1: Upload Your File

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

2

Step 2: Select Output Format

AIFF 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 AIFF file when ready

Convert AU to AIFF - Complete Guide

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

What changes when you convert AU to AIFF

  • The audio is re-encoded into the AIFF format. Because re-encoding is not free, start from the highest-quality source you have and keep quality settings high.
  • Expect a larger output file: AIFF stores AU content with less aggressive compression.

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.

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.

What AIFF keeps

  • AIFF adds: uncompressed, studio-quality audio on Apple platforms.

Things to watch out for

  • One AIFF limitation to keep in mind: very large files.

When to convert AU to AIFF

  • Convert AU to AIFF for Apple audio editing.
  • Convert AU to AIFF for high-quality source files.
  • Pick AIFF when you need no generation loss.

AU vs AIFF — format comparison

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

AttributeAUAIFF
TypeAudio fileAudio file
CompressionFlexible (lossy or lossless)Uncompressed
Web-friendlyNoNo
Typical file sizeMediumLarge
Best forlegacy Unix and Java system soundsApple audio editing

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Need the opposite conversion?

Convert AIFF to AU

Other AU Conversions

More formats you can convert AU to

Convert AU to MP3Convert AU to WAVConvert AU to AACConvert AU to OGGConvert AU to FLACConvert AU to M4AConvert AU to WMAConvert AU to OPUSConvert AU to AC3Convert AU to AMRConvert AU to CAFConvert AU to MKAConvert AU to WVConvert AU to SPXConvert AU to OGAConvert AU to DTSConvert AU to MP2
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Convert to AIFF

Other formats you can convert to AIFF

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

AU to AIFF FAQ

Converting AU to AIFF preserves the content faithfully; output also depends on the source file and any settings you choose.
Upload your AU file, confirm AIFF as the output format, and click Convert. Job status is shown while the file is processed, then you can download the AIFF 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 AU to AIFF 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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