AU to AAC Converter — Free Online

Free online AU to AAC converter — quickly transform your audio files without registration or software installation. Our service lets you convert au to aac in just a few clicks. Conversion happens right in your browser — files are never uploaded to a server and stay on your device. AAC provides better sound quality than MP3 at the same size. Used by iTunes, YouTube and streaming services. Try our au to aac converter right now!

🔄 How AU to AAC Converter Works

AU to AAC conversion is fast and convenient. Drag multiple files to upload area, and our online converter processes them in seconds.

Full control over quality: bitrate, sample rate, channels. Customize au to aac conversion settings to your needs.

Processing runs locally in browser. Your files stay private — we never access your audio. Works on Windows, Mac, Linux, Android and iOS.

🎯 Problems This Converter Solves

Can't open AU file?

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

Running out of space for AU?

Compression to AAC frees up storage with good audio quality.

Want to share music?

AAC format opens on any device without issues.

Syncing music with iPhone?

AAC format is native to Apple ecosystem.

💡 Common Uses for AAC

📱 Upload to iPhone/iPad

🎵 Add to iTunes/Apple Music

📺 YouTube video audio

💾 High-quality compression

✨ Our Converter Advantages

⚡ Speed Optimized

Optimized algorithms for lightning-fast processing

📦 Group Convert

Up to 10 audio files in one session

🌐 Universal Access

Open in browser and start converting

🔒 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.

AAC Compact format

Advanced Apple codec. Better than MP3 at equal bitrate.

❓ Frequently Asked Questions

How do I change AU to AAC?

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

Do I need to pay for AU to AAC conversion?

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

Is quality lost when converting AU to AAC?

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 AAC

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 AAC files