MP3→AUConverter
Convert your MP3 files to AU format instantly. Free, fast, and secure - your files never leave your browser.
↔ Convert AU to MP3 insteadDrop file or click to browse
Max 100MB • Auto-deletes after 3 min
How to Convert MP3 to AU
Upload Your File
Drag & drop your MP3 file or click to browse. Files up to 100MB are supported.
Convert
Click "Convert to AU" and wait a few seconds for processing.
Download
Download your converted AU file instantly. No registration needed.
Why Convert MP3 to AU?
Converting MP3 to AU helps ensure compatibility with your preferred audio player, editing software, or streaming platform.
About MP3 and AU
What is MP3?
MP3 (MPEG Audio Layer III) is the world's most popular audio format, offering good quality at small file sizes with universal device and software compatibility.
What is AU?
AU (.au) is a widely-used audio format. ModConvert supports converting AU files to 16 different formats including MP3, WAV, FLAC, OGG and more.
Frequently Asked Questions
How do I convert MP3 to AU?
Upload your MP3 file using the converter above, then click "Convert". Your file will be processed and you can download the converted AU file immediately. The entire process takes just seconds.
Is it free to convert MP3 to AU?
Yes, ModConvert is completely free to use. There are no hidden charges, no registration required, and no watermarks on your converted files.
Is my MP3 file safe when converting?
Absolutely. Your files are processed securely and are never stored permanently on our servers. Files are automatically cleaned up after conversion to protect your privacy.
What is the maximum file size for MP3 to AU conversion?
You can convert MP3 files up to 100MB in size. This covers most common use cases for audio files.
Can I convert multiple MP3 files at once?
Yes, you can upload and convert multiple MP3 files. Each file will be converted to AU format individually for the best quality results.