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
No universo digital atual, onde a agilidade e a compatibilidade sonora são cruciais, converter arquivos de áudio é uma necessidade frequente. Se você trabalha com produção de conteúdo, lida com documentação digital ou simplesmente busca otimizar seus arquivos de áudio para dispositivos móveis, a transição de AIFF para AU pode ser a solução ideal. Entendemos que cada formato possui suas particularidades e que a escolha certa faz toda a diferença na qualidade final e na acessibilidade do seu material. Prepare-se para descobrir como essa conversão pode simplificar seu fluxo de trabalho, garantindo que seus áudios sejam reproduzidos perfeitamente, seja para uma transação bancária digital ou um podcast criativo. Nosso objetivo é facilitar essa jornada, tornando o processo intuitivo e eficiente para todos os nossos usuários.
- Áudios para apps bancários (Brasil)
- Locuções para conteúdo digital (Portugal)
- Gravações de reuniões (uso móvel)
Historicamente, o formato AU teve grande adoção em sistemas UNIX, o que ainda o torna relevante para certas infraestruturas legadas em algumas instituições financeiras e de pesquisa na região.
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.