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Convert AMR to AAC - Upgrade Voice Recordings

Transform mobile voice recordings into modern AAC format for universal playback.

Step 1: Upload your files

You can also Drag and drop files.

Step 2: Choose format
Step 3: Convert files

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Why Convert AMR to AAC?

AMR files were designed for voice recordings on older mobile phones, prioritizing small file sizes over audio quality. While this made sense for 2G-era devices with limited storage, these files often struggle on modern devices and apps.

AAC (Advanced Audio Coding) delivers significantly better sound quality while maintaining reasonable file sizes. In our testing, AMR files converted to AAC showed noticeable clarity improvements, especially in voice recordings where every nuance matters.

How to Convert AMR to AAC

  1. Upload your AMR file - Drag and drop or click to select your voice recording
  2. Confirm AAC output - AAC is pre-selected for best compatibility
  3. Download your file - Your upgraded audio is ready instantly

The entire process takes seconds. No account required, no software to install.

AMR vs AAC: Technical Comparison

AMR (Adaptive Multi-Rate) was created specifically for speech encoding in mobile networks. It uses bitrates from 4.75 to 12.2 kbps-extremely low by modern standards. This aggressive compression works for phone calls but loses audio detail.

AAC operates at much higher bitrates (typically 128-256 kbps for standard quality) and uses more sophisticated compression algorithms. The result is audio that sounds fuller and more natural, without the characteristic "telephone" quality of AMR files.

  • AMR: 4.75-12.2 kbps, optimized for speech only, limited device support
  • AAC: 64-320 kbps, handles voice and music, universal playback support

Common Use Cases

Archiving Old Voice Memos

Many older Android phones saved voice memos as AMR. Converting them to AAC ensures they remain playable on current devices and can be backed up to modern cloud services.

Sharing Recordings

Sending an AMR file to someone often results in confusion-they cannot open it. AAC files play natively on iPhones, Android devices, Windows, and Mac without extra software.

Editing Audio

Most audio editing software handles AAC better than AMR. If you need to trim, enhance, or combine voice recordings, converting to AAC first gives you more editing options.

When to Choose a Different Format

AAC works well for most purposes, but consider alternatives for specific needs:

  • AMR to MP3: Choose MP3 for maximum compatibility with older devices and car stereos
  • AMR to WAV: Use WAV when you need uncompressed audio for professional editing

For general playback and sharing, AAC offers the best balance of quality and compatibility.

Works in Any Browser

This converter runs entirely in your browser-no uploads to external servers. Your audio files stay private on your device throughout the conversion process. Compatible with Chrome, Firefox, Safari, Edge on Windows, Mac, Linux, and mobile devices.

Pro Tip

If your AMR file came from an old phone backup, check if you have multiple recordings. Batch convert them all at once rather than one by one-it saves significant time when archiving old voice memos.

Common Mistake

Expecting dramatic quality improvements after conversion. AMR files are heavily compressed at the source, so converting to AAC won't recover lost audio detail. The real benefit is universal playback compatibility.

Best For

Archiving voice recordings from older Android phones, sharing audio that recipients can actually open, and preparing voice memos for editing in modern audio software.

Not Recommended

If your files already play correctly on your devices and you don't need to share them, conversion isn't necessary. Only convert when you encounter playback issues or need broader compatibility.

Frequently Asked Questions

AMR (Adaptive Multi-Rate) is an audio format designed for voice recordings on mobile phones. It uses very low bitrates (4.75-12.2 kbps) to save storage space, resulting in smaller files but lower audio quality compared to modern formats.

AAC uses higher bitrates and more advanced compression, producing significantly clearer audio. It supports a wider frequency range, handles both voice and music well, and plays on virtually all modern devices without additional software.

The conversion cannot add detail that was lost in the original AMR compression. However, AAC encoding is more efficient, so playback often sounds cleaner. The main benefit is compatibility-AAC plays on far more devices than AMR.

Yes. Upload several AMR files and convert them all to AAC in a single batch. This is useful when archiving a collection of old voice recordings from a previous phone.

No. The conversion happens entirely in your browser using local processing. Your audio files never leave your device, ensuring complete privacy for sensitive recordings.

AAC is universally supported. It plays natively on iPhones, iPads, Android phones, Windows PCs, Macs, and most car audio systems. It's also the default format for iTunes and Apple Music.

Many media players don't include AMR codecs by default. Windows Media Player and macOS Preview often fail to open AMR files. Converting to AAC solves this-all modern systems play AAC without additional software.

AMR to AAC conversion is nearly instant for typical voice recordings. A 5-minute voice memo converts in under a second on most devices.

We use a quality-optimized bitrate that balances file size and audio clarity. For voice recordings originally in AMR, this typically results in files that are clearer while remaining reasonably sized.

AAC generally produces better audio quality at the same file size compared to MP3. Choose MP3 only if you specifically need compatibility with older devices that don't support AAC, like some older car stereos or MP3 players.

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