How do I convert a 3GP file to AU audio step by step?

On the LetsConvert 3GP to AU page, click Upload and select your 3GP file. Then choose AU as the output audio format and click Convert. The tool extracts the AAC/AMR audio track from the 3GP container, decodes it, and encodes it as an uncompressed PCM AU file. After the conversion completes, click Download to save the .au file to your device.

Why should I convert from 3GP to AU instead of keeping the original audio?

3GP is a video container designed for mobile multimedia, typically storing compressed audio like AAC or AMR to reduce file size. AU is an audio-only format used in legacy Unix systems and Java applets, and it often contains uncompressed PCM data. Converting to AU is useful when you need an audio file that is compatible with old audio editors, UNIX sound tools, or Java-based applications, and when you want a lossless PCM representation for professional editing.

How does the conversion preserve audio quality and technical attributes?

The converter decodes the compressed audio stream from the 3GP file and re-encodes it as linear PCM in the AU container. This preserves the original sample rate and channel count (e.g., mono or stereo), and the audio is stored at a fixed bit depth of 16 bits per sample (or the source's native bit depth). However, any metadata like album art, ID3 tags, or container-level timestamps are not carried over because the AU header only stores basic parameters such as sample rate, sample encoding, and number of channels.

Is 3GP-TO-AU free to use?

Yes, 3GP-TO-AU on LetsConvert is 100% free with no registration or hidden fees required.

Are my uploaded files safe and secure?

Yes! File privacy and security are guaranteed. Basic conversions run locally in your browser. Files sent for server processing are automatically deleted within 1 hour.

Does this converter work on mobile phones and tablets?

Yes! 3GP-TO-AU works seamlessly across iPhone, Android, iPad, Mac, Windows, and Linux browsers without installing any app.

Is there any software installation required?

No software or browser extension installation is needed. All conversions are performed directly online.

3GP➔AU· 100% Free & Full HD

3GP-TO-AU

Convert your 3GP video to AU audio by extracting the AAC/AMR track into uncompressed PCM. Ideal for legacy Unix editors and Java apps.

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4.7 / 5.0(20 user ratings)

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Supports up to 50MB · Hardware accelerated transcode

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3GP

3GP File Format

Source Format

3GP is a standardized digital file format supported by LetsConvert. Convert 3GP files securely, privately, and instantly online with zero software installation, bank-grade encryption, and automatic 60-minute file purging.

Category: Data & Media File

MIME Type: application/3gp

Developer: Standard Organization

Best For: Converting and managing 3GP files across devices and applications.

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AU

AU File Format

Target Output

AU is a standardized digital file format supported by LetsConvert. Convert AU files securely, privately, and instantly online with zero software installation, bank-grade encryption, and automatic 60-minute file purging.

Category: Data & Media File

MIME Type: application/au

Developer: Standard Organization

Best For: Converting and managing AU files across devices and applications.

💡 Technical Guide & Conversion Insights

Why Convert 3GP to AU?

Converting from 3GP (3GP File Format) to AU (AU File Format) is essential when you need enhanced compatibility, reduced file size, or specific feature support. While 3GP is ideal for Converting and managing 3GP files across devices and applications., AU offers superior advantages for Converting and managing AU files across devices and applications.. Our secure online conversion engine ensures that all your 3GP file attributes, geometry, quality, and metadata are seamlessly preserved during the transformation into AU.

● 3GP Key Advantages:

✓Standard format compatibility
✓Fast online conversion processing
✓Zero software install required

● AU Key Advantages:

★Standard format compatibility
★Fast online conversion processing
★Zero software install required

3GP vs AU Comparison Table

Detailed technical differences and capabilities between 3GP File Format and AU File Format.

Feature / Attribute	3GP	AU
Primary Format Name	3GP File Format	AU File Format
Primary File Category	Data & Media File	Data & Media File
Standard MIME Type	application/3gp	application/au
Core Developer / Standard	Standard Organization	Standard Organization
Optimal Use Case	Converting and managing 3GP files across devices and applications.	Converting and managing AU files across devices and applications.

❓ Common Questions

Frequently Asked Questions (3GP to AU)

Everything you need to know about converting 3GP to AU with LetsConvert.

To convert your 3GP file to AU, upload your file by dragging and dropping it into the upload box or selecting it from your device. Adjust any optional quality or dimension settings, then click 'Convert'. Your converted AU file will be ready for instant high-speed download within seconds.

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100% Secure & Automatic File Purging

Your 3GP files are encrypted with 256-bit SSL and permanently deleted from our servers within 60 minutes.

● Zero File Storage

How to Convert 3GP-TO-AU

Select or drop your 3gp file.

Initiate the AU conversion process.

Download your converted AU file.

⚡ Related Video Tools

3GP-TO-AU

3GP

AU

Why Convert 3GP to AU?

● 3GP Key Advantages:

● AU Key Advantages:

3GP vs AU Comparison Table

Frequently Asked Questions (3GP to AU)

100% Secure & Automatic File Purging

How to Convert 3GP-TO-AU

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