AMR to AU for Audio Workflows
Fast, instant AMR to AU conversion. No signup required. Just drop your .amr file and get .au in seconds.
Batch Settings
您是否曾遇到这样的情况：手头有一些AMR格式的音频文件，却发现它们在某些设备上播放不顺畅，或是无法直接分享给朋友？AMR作为一种早期的语音编码格式，在移动设备和网络带宽有限的年代曾广泛应用，尤其在通话录音或简单的语音备忘中十分常见。然而，随着技术发展，AU格式以其更广泛的兼容性和在某些专业音频处理场景中的优势，逐渐展现出其独特的价值。将AMR转换为AU，不仅能让您的音频文件在更多平台上无障碍播放，还能为后续的编辑、分享或归档提供便利。我们的工具致力于提供一个高效、稳定的转换体验，让您的AMR文件轻松变身，适应更广泛的应用场景，无论您是想在不同设备间自由切换，还是为您的项目寻找更合适的音频格式，都能在这里找到满意的解决方案。
- 微信语音转发
- 游戏配音素材
- 老旧录音兼容
在华语地区，许多早期智能手机或功能手机的录音默认采用AMR格式，但在微信等主流社交平台直接分享或播放时，常因兼容性问题导致不便，转换为AU能有效解决此类困扰。
About AMR to AU Conversion
Whether you're one of the many musicians, podcasters, and audio engineers who work with AMR files daily, there comes a time when you need AU instead. AMR is a speech-optimised audio codec used in mobile voice recordings.
Here's a typical scenario: you receive a .amr file but your project, platform, or client requires .au. AU is a widely used file format. Rather than searching for desktop software or wrestling with command-line tools, you can convert AMR to AU online in seconds with CocoConvert.
This conversion is ideal when you When you need a AU file. The conversion helps you convert between formats quickly.
Converting AMR to AU maintains high quality with CocoConvert's optimised encoder settings.
Behind the scenes, CocoConvert uses industry-standard tools — FFmpeg for audio and video, Sharp for images, qpdf for documents. Your file is uploaded securely (TLS encryption), processed on isolated servers in Germany, and auto-deleted within 24 hours. No account, no watermark, no hidden fees.
Power users can batch convert up to 100 files simultaneously with a Pro subscription, making it practical for production workflows.
How to Convert AMR to AU
- 1
Drop your file
Drag your .amr file onto the converter. Need to process many files? Add up to 5 at once (100 for Pro).
- 2
Set output to AU
Pick AU from the format list. The converter automatically tunes settings for the AMR→AU pair.
- 3
Hit Convert
Processing happens server-side — your browser stays responsive. Most audio files convert in under 10 seconds.
- 4
Download and use
Your .au file is ready to plug into your workflow. Download it or share the link (expires in 24 hours).
What Happens When You Convert AMR to AU
Your AMR file is decoded and re-encoded as AU.
Your AMR 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
AMR
.amr file
| Extension | .amr |
| MIME Type | audio/amr |
| Category | Audio |
AU
.au file
| Extension | .au |
| MIME Type | audio/basic |
| Category | Audio |
Should You Convert AMR to AU?
When to Convert
- ✓When you need a AU file
Frequently Asked Questions
Who needs to convert AMR to AU?
This conversion is commonly used by musicians, podcasters, and audio engineers. Typical reasons include convert between formats quickly and ensuring compatibility with downstream tools or platforms.
Can I convert AMR to AU without losing quality?
Converting AMR to AU maintains high quality with CocoConvert's optimised encoder settings.
Do I need to install software to convert AMR to AU?
No. CocoConvert runs entirely in your browser — no downloads, no plugins. It works on macOS, Windows, Linux, iOS, and Android.
How many AMR files can I convert at once?
Free users can convert up to 5 files per hour. Pro subscribers get 100 files per hour with larger size limits (5 GB per file). Business API users can integrate batch conversion directly into their tools.
Is there an API for AMR to AU conversion?
Yes. CocoConvert offers a Business API for automated conversions. It supports all the same format pairs available in the web interface, including AMR to AU.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.