AU to WMA — Format Comparison & Online Converter
Fast, instant AU to WMA conversion. No signup required. Just drop your .au file and get .wma in seconds.
Batch Settings
AU格式，作为历史悠久的音频标准，在某些专业领域依然可见，但若想在日常生活中随心播放、便捷分享，或是与主流平台无缝对接，将其转换为WMA（Windows Media Audio）无疑是更明智的选择。WMA以其良好的压缩比和音质平衡，在Windows生态系统及许多媒体播放器中拥有广泛的兼容性。无论是将老旧的AU音频文件“活化”，使其适应现代设备的播放需求；还是为了在多平台之间实现更顺畅的音频流转，本页面提供的转换工具都能助您一臂之力，让您的音频内容焕发新的活力，轻松融入数字生活。
- 微信分享音频
- 游戏配乐适配
- 旧系统音频兼容
值得一提的是，WMA在大陆地区曾因Windows系统普及而广受欢迎，但在移动互联网时代，其使用频率相较于MP3或AAC有所下降。然而，对于某些特定应用场景，如Windows Phone遗留音频或旧版播放器，WMA仍是不可或缺的格式。
About AU to WMA Conversion
AU and WMA (introduced 1999) are both audio formats, but they differ in important ways. AU is a widely used file format. WMA (Windows Media Audio) is Microsoft's audio codec — less common today but still found in legacy collections.
When you convert AU to WMA, the goal is to convert between formats quickly. Converting AU to WMA maintains high quality with CocoConvert's optimised encoder settings. Understanding these technical differences helps you choose the right format for your workflow.
Your AU file is decoded and re-encoded as WMA. The conversion involves 4 steps: (1) your au file is uploaded and validated, (2) the file is decoded (parsed into its raw data), (3) the data is re-encoded in wma format, (4) the converted file is ready for download.
CocoConvert's converter handles the entire pipeline server-side using FFmpeg, Sharp, and qpdf — battle-tested libraries used by streaming platforms and enterprise tools. Files are encrypted in transit and deleted within 24 hours.
This conversion is ideal when you When you need a WMA file. For the opposite direction, CocoConvert also supports WMA to AU conversion.
How to Convert AU to WMA
- 1
Upload .au file
Select your AU file by dragging it to the upload zone or using the file picker. Batch upload is available for multiple files.
- 2
Choose .wma
Set WMA as the output format. The converter uses optimal settings based on the AU→WMA conversion profile.
- 3
Convert
The server-side engine decodes your AU file and re-encodes it as WMA. Processing time depends on file size and complexity.
- 4
Download result
Grab your converted .wma file. Multiple output files can be downloaded together.
What Happens When You Convert AU to WMA
Your AU file is decoded and re-encoded as WMA.
Your AU file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in WMA format
The converted file is ready for download
Format Comparison
AU
.au file
| Extension | .au |
| MIME Type | audio/basic |
| Category | Audio |
WMA
.wma file
| Extension | .wma |
| MIME Type | audio/x-ms-wma |
| Category | Audio |
Should You Convert AU to WMA?
When to Convert
- ✓When you need a WMA file
Frequently Asked Questions
What is the difference between AU and WMA?
AU is a widely used file format. WMA (Windows Media Audio) is Microsoft's audio codec — less common today but still found in legacy collections.
Does AU to WMA conversion affect quality?
Converting AU to WMA maintains high quality with CocoConvert's optimised encoder settings.
Which format has better compression, AU or WMA?
AU is a common audio format. WMA uses lossy compression. The better choice depends on whether you prioritize file size or quality.
How long does AU to WMA conversion take?
Most conversions finish in seconds. Larger files or complex audio content may take 10–30 seconds. CocoConvert processes files in parallel for batch jobs.
Is AU or WMA better for long-term storage?
Both formats use lossy compression, so consider keeping your original source file for long-term storage.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.