M4R to AU Converter — Free Online

Free online M4R to AU converter — quickly transform your audio files without registration or software installation. Our service lets you convert m4r to au in just a few clicks. Upload your file to our server and get the result in seconds. Files are automatically deleted after download. AU is a classic Unix/Sun format. Widely supported in scientific and professional software. Try our m4r to au converter right now!

🔄 How M4R to AU Converter Works

M4R to AU — professional server-side conversion. Perfect results thanks to optimized processing algorithms.

Our m4r converter supports quality settings from 64 to 320 kbps. Choose parameters that match your requirements.

Server conversion to AU works reliably on any device. Your device stays free — all work is done on our server.

🎯 Problems This Converter Solves

Can't open M4R file?

Not all software works with M4R. Convert to compatible AU.

💡 Common Uses for AU

📁 Convert to AU format

🔄 Change audio format

📱 Device compatibility

💾 Optimize file size

✨ Our Converter Advantages

⚡ Rapid Conversion

No waiting — results delivered immediately

🎯 Studio Grade

Optimized AU conversion without quality loss

🔋 Device-Friendly

Save battery — file is processed on server

🔒 Secure Handling

Your data stays private — no storage

🎵 Flexible Settings

Choose quality, bitrate, and other parameters

💰 No Payment

All features available free without an account

📊 Format Comparison

M4R Compact format

iPhone ringtone. AAC container up to 40 seconds.

AU High quality

Sun Audio. Classic Unix format for software.

❓ Frequently Asked Questions

How do I change M4R to AU?

Drag and drop your M4R file, choose AU as target format, and start conversion. Download the result instantly.

Do I need to pay for M4R to AU conversion?

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

Is quality lost when converting M4R to AU?

Quality won't be restored — lost data can't be recovered. However, the file becomes compatible with lossless software.

Is batch M4R to AU processing supported?

For AU format, server processing handles one file at a time. This ensures best quality.

Is there a size limit for M4R files?

Maximum size is 30 MB. Server processes the file and automatically deletes it.

How are files processed for AU conversion?

File is uploaded to server, converted to AU, and immediately ready for download. Source is deleted after you get the result.

📝 How to Convert M4R to AU

1

Upload File

Drag & drop M4R 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 AU files