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HomeAIF vs AU
.aif
.au

AIF vs AU

Compare Audio Interchange File Format and Sun Audio formats — understand the key differences and when to use each

Format Overview

AIF

Audio Interchange File Format

Audio Interchange File Format (.aif) is a audio file format.

.aifaudio

AU

Sun Audio

Sun Audio (.au) is a audio file format.

.auaudio

AIF vs AU: Feature Comparison

FeatureAIFAU
Full NameAudio Interchange File FormatSun Audio
File Extension.aif.au
Categoryaudioaudio
Free to Convert✓ Yes✓ Yes
Browser Support✓ All Browsers✓ All Browsers
Convert to Each Other✓ Yes✓ Yes

When to Use AIF vs AU

Use AIF when you need:

  • •Files in Audio Interchange File Format format for maximum compatibility
  • •Industry-standard audio format support
  • •Wide software and platform compatibility

Use AU when you need:

  • •Files in Sun Audio format for specific workflows
  • •Optimized audio format features
  • •Modern format advantages and smaller file sizes

Convert Between Them

AIF AUAU AIF
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Learn More About These Formats

AIF Converter AU Converter

Frequently Asked Questions

What is the difference between AIF and AU?
AIF (Audio Interchange File Format) and AU (Sun Audio) are both audio file formats. AIF files use the .aif extension while AU uses .au. They differ in compression, quality, compatibility, and intended use cases.
Can I convert AIF to AU for free?
Yes! Convert999 lets you convert AIF to AU completely free, directly in your browser. No file upload to any server, no registration needed — your files stay private on your device.
Which is better, AIF or AU?
It depends on your use case. AIF (Audio Interchange File Format) may be better for certain workflows, while AU (Sun Audio) excels in others. Consider factors like file size, quality, software compatibility, and your specific needs.
Is it safe to convert files on Convert999?
Absolutely. Convert999 processes all files 100% locally in your browser. Your files are never uploaded to any server, ensuring complete privacy and security.

AIF Converter

Convert from AIF

AU Converter

Convert from AU

File Tools

Compress, resize, merge

Convert to AIF

All sources → AIF

Convert to AU

All sources → AU

Format Statistics

Trends & data 2025

More Format Comparisons

JPGvsPNGPNGvsWEBPJPGvsWEBPSVGvsPNGHEICvsJPGBMPvsJPGTIFFvsJPGGIFvsPNG