AU to MP3 Converter — Free Online

Free online AU to MP3 converter — quickly transform your audio files without registration or software installation. Our service lets you convert au to mp3 in just a few clicks. Conversion happens right in your browser — files are never uploaded to a server and stay on your device. MP3 is the world's most popular audio format. Supported by all devices from smartphones to car stereos. Try our au to mp3 converter right now!

🔄 How AU to MP3 Converter Works

Our free au converter quickly produces MP3 files. Upload source files, choose settings, and click "Convert".

Batch conversion saves time — process multiple files in one session. Flexible bitrate settings help balance quality and size.

AU to MP3 online — no software installation. Open the site on any device with a browser and start converting now.

🎯 Problems This Converter Solves

Can't open AU file?

Not all software works with AU. Convert to compatible MP3.

Running out of space for AU?

Compression to MP3 frees up storage with good audio quality.

Want to share music?

MP3 format opens on any device without issues.

💡 Common Uses for MP3

🎧 Play on any device

📱 Upload to player or smartphone

💾 Save storage space

📧 Send via email or messengers

✨ Our Converter Advantages

⚡ Instant Conversion

Audio file conversion takes just seconds

📦 Multiple Files

Convert up to 10 files at once with a single click

📱 Any Device

Works on smartphones, tablets, and computers

🔒 Data Protection

Files are removed immediately after download

⚙️ Custom Options

Control bitrate and sample rate

💰 Zero Cost

No hidden fees or subscriptions

📊 Format Comparison

AU High quality

Sun Audio. Classic Unix format for software.

MP3 Compact format

Most popular format. Supported by all devices.

❓ Frequently Asked Questions

How do I change AU to MP3?

Drag and drop your AU file, choose MP3 as target format, and start conversion. Download the result instantly.

Do I need to pay for AU to MP3 conversion?

No payment needed. The service is free, with no subscriptions or hidden costs.

Is quality lost when converting AU to MP3?

Some loss is inevitable, but at maximum 320 kbps bitrate most people won't hear the difference.

Is batch AU conversion supported?

Sure! Upload up to 10 AU files and convert them all with a single click.

Is there a file size limit for AU?

Maximum 100 MB per file. All processing happens locally on your computer.

Are my files uploaded to a server?

No, files stay on your device. The browser performs conversion locally using WebAssembly technology.

📝 How to Convert AU to MP3

1

Upload File

Drag & drop AU files or click "Choose Files"

2

Adjust Settings

Choose quality, bitrate and other options

3

Convert

Click "Convert" and wait for processing

4

Download Result

Download your MP3 files