AIFF to AU Converter

Fast AIFF to AU conversion right in your browser

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Seamless AIFF to AU

Convert AIFF recordings to AU effortlessly — just upload, choose the format, and download your converted audio.

Just Your Browser

All you need is a web browser. No plugins, no extensions, no desktop applications to install.

All Platforms Welcome

Desktop or mobile, Windows or Mac — the converter runs in your browser and works on any device.

How to convert AIFF to AU

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose au or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your au file right afterwards

About formats

AIFF (Audio Interchange File Format) was developed by Apple in 1988, drawing its structural design from Electronic Arts' IFF standard. As an uncompressed audio container, AIFF stores linear PCM data at full CD quality — typically 16-bit at 44.1 kHz — preserving every detail of the original recording without lossy encoding. The format organizes content into chunks that can also carry metadata such as markers, instrument definitions, and comments. Professional audio engineers on macOS frequently rely on AIFF because it guarantees bit-perfect fidelity through every stage of editing and mastering. One significant advantage is zero generational loss: unlike MP3 or AAC, repeated saves never degrade the signal. Another strength is seamless integration with Apple's professional tools, including Logic Pro and GarageBand, where AIFF serves as a native working format. The container supports multiple sample rates and bit depths up to 32-bit, accommodating high-resolution workflows that exceed CD-quality specifications. For anyone prioritizing lossless integrity over storage efficiency, AIFF remains a dependable choice across the recording industry.
Developer: Apple Inc.
Initial release: 1988
AU is an audio file format introduced by Sun Microsystems for its Unix workstations and the NeXT platform. It features a minimal 24-byte header specifying data offset, size, encoding type, sample rate, and channel count, followed by the audio payload. AU supports numerous encodings, including uncompressed linear PCM at various bit depths, mu-law and A-law companding (logarithmic compression used in telephone systems), and several ADPCM variants. This versatility made AU a workhorse across early Unix environments, web audio (Java applets defaulted to AU), and telephony applications. One advantage is simplicity: the compact header and straightforward structure make it trivial to parse, generate, and stream programmatically. The built-in mu-law option provides another benefit, delivering reasonable voice quality at just 8 KB per second — half the rate of 16-bit uncompressed audio — invaluable when storage and bandwidth were scarce. Although modern formats have largely supplanted AU in consumer applications, it retains a foothold in scientific computing and audio processing pipelines where minimal overhead and reliable cross-platform behavior are valued.
Developer: Sun Microsystems
Initial release: 1992

Frequently Asked Questions

Why convert AIFF to AU?

Sun AU format is standard on Unix systems. Convert AIFF when your Solaris or Linux workflow expects AU input.

What programs can open AU files?

Audacity, SoX, VLC, and most Unix/Linux audio utilities can open AU audio files without issues.

Does converting AIFF to AU cost anything?

Basic conversions are available at no charge. Premium plans unlock faster processing and higher file size limits.

Does the conversion from AIFF to AU affect sound quality?

Audio fidelity depends on source quality and output settings. The converter optimizes the encoding to deliver the best possible AU output.

Can I convert multiple AIFF files to AU at once?

Yes — upload several AIFF files simultaneously and convert them all to AU in a single batch session.

AIFF to AU Quality Rating

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