Online AU to AAC Converter

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What is an AAC File?

AAC, short for Advanced Audio Coding, is a digital audio encoding format designed to provide higher efficiency and better sound quality than MP3 at similar bitrates. It is widely used for both streaming and storing audio content.

Key Advantages of AAC Files:

Improved Compression: AAC achieves better compression efficiency than MP3, delivering higher sound quality at lower bitrates.

Enhanced Sound Quality: AAC preserves more audio detail and nuances compared to MP3, making it suitable for high-quality audio playback.

Wide Compatibility: Supported by most modern audio players, devices, and streaming services, ensuring broad accessibility.

Limitations of AAC Files:

Licensing: AAC is a proprietary format, and its licensing may incur costs or restrictions for use in certain applications.

Lossy Compression: Like MP3, AAC involves discarding some audio data during compression, which may result in perceptible quality loss compared to lossless formats.


AAC is preferred for its balance of high efficiency, improved sound quality, and broad compatibility, making it ideal for digital audio distribution and playback in various environments.

How to Convert AU to AAC?

Step 1: Import Audio File

Drag your AU audio file into the designated area or click 'Browse' to upload it from your computer.

Step 2: Customize Audio Settings

Set your preferred options for the AAC audio, such as bitrate, sample rate, and additional settings.

Step 3: Begin the Conversion

Click on the 'Convert' button to start the conversion process from AU to AAC format.

Step 4: Save the File

When the conversion process is finished, click the 'Download' button to save the AAC audio file to your computer.

Step 5: Repeat Conversion

To convert another AU file to AAC, click on the 'Convert Another' button and repeat the process.

AU to AAC Conversion FAQs

1. What are the benefits of converting AU to AAC?

Experience hassle-free AU to AAC conversion with us. Upload your AU file, and our tool will convert it to AAC with ease.

2. How do I add AU files for converting to AAC?

Upload your AU files by dragging them in or clicking 'Browse'. The upload interface is user-friendly, allowing you to quickly add your AU files for conversion to AAC.

3. How do I get the AAC file once the conversion is complete?

After conversion, use the Download button to get your AAC file. The download link will be available once the conversion is complete, allowing you to save the AAC file.

4. How many AU files can I convert to AAC at the same time?

Batch conversion of AU to AAC is supported and easy to do. You can upload and convert multiple AU files to AAC at once, ensuring a seamless conversion process.

5. Is there a way to start another AU conversion?

Use the 'Convert Another' button or file uploader for additional conversions. This option makes it easy to begin another AU to AAC conversion after completing one.

6. How secure is the AU to AAC conversion process?

Yes, the conversion process is secure and happens entirely on the client side. This means your AU files are processed locally, maintaining the highest level of security.

7. Will the AAC files be high quality after conversion?

The conversion process ensures high-quality output for all AAC files. Our tool is designed to maintain the integrity and quality of your AU files when converting to AAC.

8. Can I convert large AU files to AAC?

Ensure your AU files are under 25MB for conversion. This size limit helps maintain the efficiency and speed of the conversion process, ensuring you get your AAC file promptly.

9. Does converting AU to AAC take a long time?

Fast conversion times are typical, with file size and internet speed as factors. Our tool is designed to provide quick conversions, ensuring you get your AAC file without any delays.

10. What should I do if I have trouble converting AU to AAC?

Get support by contacting us through the 'Contact Us' page. Our support team is ready to help you with any issues or questions regarding the AU to AAC conversion process.