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
音频文件格式转换，听起来可能有些技术性，但其实和我们的日常生活息息相关。想象一下，您有一段珍贵的AIFF格式录音，想在老式播放器上播放，或者为了兼容一些特定应用，需要把它变成AU格式。这两种格式在音频处理领域都有其独特地位，AIFF以其无损音质常用于专业编辑，而AU则因其简洁和跨平台兼容性，在某些特定场景下仍有广泛应用。我们的工具，就是为了让这种转换变得轻而易举，无需复杂的设置，几步操作就能完成，确保您的音频文件在新环境下也能完美呈现，无论是专业制作还是日常分享，都能顺畅无阻。
- 游戏音效兼容老平台
- 微信分享特定音频
- 旧款播放器音乐转换
在华语地区，AU格式虽然不如MP3或WAV普及，但在一些旧版Unix系统或早期多媒体应用中仍有其身影，尤其在处理一些历史音频素材时，转换至AU格式能更好地兼容特定软硬件环境。
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.