AIFF vs AU — Comparison & Free Converter
Fast, instant AIFF to AU conversion. No signup required. Just drop your .aiff file and get .au in seconds.
Batch Settings
Die Umwandlung von AIFF-Dateien ins AU-Format ist oft eine Notwendigkeit, insbesondere wenn es darum geht, Audiodateien plattformübergreifend und mit älteren Systemen kompatibel zu halten. AIFF, bekannt für seine unkomprimierte Qualität, findet häufig Anwendung in professionellen Audio-Umgebungen, während das AU-Format, ursprünglich von Sun Microsystems entwickelt, seine Stärken in der Kompatibilität mit Unix-basierten Systemen und spezifischen Softwarelösungen ausspielt. Unser Konverter wurde entwickelt, um diesen Übergang nahtlos und effizient zu gestalten. Wir verstehen die Bedeutung präziser Audio-Konvertierung, besonders in technischen und geschäftlichen Kontexten, wo Datenintegrität und Kompatibilität oberste Priorität haben. Verlassen Sie sich auf eine Lösung, die Leistung und Benutzerfreundlichkeit optimal verbindet, um Ihre Anforderungen an die Audioverarbeitung zuverlässig zu erfüllen.
- CAD-Sprachnotizen für ältere Workstations
- Archivierung von Maschinenakustikdaten
- Kompatibilität mit spezialisierter Branchensoftware
In DACH-Regionen ist die langfristige Archivierung von technischen Audiodaten und deren Kompatibilität mit proprietären Systemen, die teils noch auf älteren Unix-Derivaten laufen, ein wiederkehrendes Thema. Das AU-Format bietet hier oft eine pragmatische Brücke.
About AIFF to AU Conversion
AIFF or AU — which format should you use? The answer depends on your needs. Here's a quick breakdown.
AIFF is Apple's uncompressed audio format — equivalent to WAV in quality. It has mostly universal platform support. AU is a widely used file format. It has common platform support.
So when should you convert AIFF to AU? This conversion is ideal when you When you need a AU file. This conversion helps you convert between formats quickly.
Converting AIFF to AU maintains high quality with CocoConvert's optimised encoder settings.
If you've decided AU is the right choice, CocoConvert makes the conversion effortless. Upload your .aiff file, pick AU, and click Convert — done in seconds. The converter runs on secure servers in Germany, powered by FFmpeg, Sharp, and qpdf. Files are encrypted via TLS and erased within 24 hours.
Free tier: 5 files/hour, 250 MB each. Pro: 100 files/hour, 5 GB each. Works in every modern browser on desktop and mobile.
How to Convert AIFF to AU
- 1
Choose your AIFF file
Upload your .aiff file using drag-and-drop or the file browser. Batch mode lets you add multiple files.
- 2
Set format to AU
Select .au from the output options. The converter applies optimal quality settings automatically.
- 3
Run the conversion
Click Convert. Server-side processing means your device stays fast — even for large audio files.
- 4
Get your AU file
Download your converted file instantly. Batch downloads are available as a zip archive.
What Happens When You Convert AIFF to AU
Your AIFF file is decoded and re-encoded as AU.
Your AIFF file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in AU format
The converted file is ready for download
Format Comparison
AIFF
.aiff file
| Extension | .aiff |
| MIME Type | audio/aiff |
| Category | Audio |
AU
.au file
| Extension | .au |
| MIME Type | audio/basic |
| Category | Audio |
Should You Convert AIFF to AU?
When to Convert
- ✓When you need a AU file
Frequently Asked Questions
Should I use AIFF or AU?
It depends on your goal. AIFF preserves full quality. AU preserves full quality. Choose based on whether file size or quality matters more for your use case.
Is AU higher quality than AIFF?
Not necessarily. Converting AIFF to AU maintains high quality with CocoConvert's optimised encoder settings. Quality depends on the compression type and settings, not just the format name.
Can I convert AIFF to AU on Mac and Windows?
Yes. CocoConvert is a web-based tool that works in all modern browsers — Chrome, Safari, Firefox, Edge — on any operating system including macOS, Windows, Linux, iOS, and Android.
Is CocoConvert free for AIFF to AU?
Yes. Free users get 5 conversions per hour (250 MB each). Pro subscribers unlock 100 files per hour, 5 GB per file, and priority processing.
What tools does CocoConvert use for AIFF to AU?
CocoConvert uses FFmpeg for audio/video, Sharp for images, and qpdf for documents — the same open-source libraries used by Netflix, YouTube, and major enterprise platforms.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.