AU to M4R Converter — Free Online

Free online AU to M4R converter — quickly transform your audio files without registration or software installation. Our service lets you convert au to m4r in just a few clicks. Upload your file to our server and get the result in seconds. Files are automatically deleted after download. M4R is the official iPhone ringtone format. Up to 40 seconds for a ringtone. Try our au to m4r converter right now!

🔄 How AU to M4R Converter Works

M4R format requires a specialized codec. Our online converter uses server processing for perfect M4R quality.

Simply upload your AU file, configure bitrate and sample rate — the server handles the rest. Save your device resources.

Free AU to M4R conversion without registration. Powerful server processes your file in seconds and prepares it for download.

🎯 Problems This Converter Solves

Can't open AU file?

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

Running out of space for AU?

Compression to M4R frees up storage with good audio quality.

Syncing music with iPhone?

M4R format is native to Apple ecosystem.

💡 Common Uses for M4R

📱 Create iPhone ringtone

🔔 Set as ringtone

💬 Notifications and alarms

✨ Our Converter Advantages

⚡ Speed Optimized

Optimized algorithms for lightning-fast processing

🎯 Best Quality

Maximum precision when converting to M4R

☁️ Cloud Conversion

Server processing guarantees compatibility

🔒 Complete Security

Your files are protected and auto-deleted after processing

🎛️ Full Control

Adjust audio quality to your needs

💰 Free Service

Convert as much as you want — it costs nothing

📊 Format Comparison

AU High quality

Sun Audio. Classic Unix format for software.

M4R Compact format

iPhone ringtone. AAC container up to 40 seconds.

❓ Frequently Asked Questions

How do I change AU to M4R?

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

Do I need to pay for AU to M4R conversion?

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

Is quality lost when converting AU to M4R?

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

Is batch AU to M4R processing supported?

For M4R format, server processing handles one file at a time. This ensures best quality.

Is there a size limit for AU files?

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

How are files processed for M4R conversion?

File is uploaded to server, converted to M4R, and immediately ready for download. Source is deleted after you get the result.

📝 How to Convert AU to M4R

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 M4R files