AAC to M4A Converter
Convert AAC audio files to M4A format for optimal Apple device compatibility. Perfect for iTunes, iPhone, and iPad. Professional-quality audio conversion powered by FFmpeg, all processing happens securely in your browser.
Recommended Settings
For Music
- •256 kbps (iTunes standard)
- •Excellent quality for all music
- •Perfect for Apple ecosystem
For Podcasts
- •128-192 kbps for spoken word
- •Smaller files, good quality
- •Supports chapter markers
Pro Tips
- •M4A offers better quality than MP3 at the same bitrate
- •256 kbps is Apple's iTunes Plus standard
- •M4A supports metadata, cover art, and chapter markers
Most Popular
Most users choose 256 kbps for iTunes-quality audio
When to Use This Tool
M4A is Apple's preferred audio format, offering excellent compatibility with iTunes, iPhone, iPad, and other Apple devices.
Recommended: 192-256 kbps
Convert AAC to M4A for seamless integration with iTunes and Apple Music libraries.
Recommended: 256 kbps
M4A is ideal for podcasts and audiobooks with support for metadata and chapter markers.
Recommended: 128-192 kbps
How It Works
Upload your AAC audio file
Select desired bitrate
FFmpeg rewraps to M4A container
Download your converted M4A file
100% Private
Files never leave your device. All processing happens locally in your browser.
Lightning Fast
Powered by FFmpeg.wasm (WebAssembly) for optimal performance on modern browsers.
Open Source
Built with verified, open-source libraries. Fully transparent.
Frequently Asked Questions
What is M4A format?
M4A is an audio-only MPEG-4 container that typically uses AAC encoding. It's Apple's standard format for music files, offering better quality than MP3 at the same bitrate.
Is M4A the same as AAC?
M4A is a container format that usually contains AAC-encoded audio. AAC is the codec, while M4A is the file extension and container. Converting AAC to M4A rewraps the audio in the M4A container.
Will M4A work on non-Apple devices?
Yes, M4A is widely supported on most modern devices, smartphones, and media players. However, compatibility is best on Apple devices and software.
What bitrate should I use?
256 kbps is Apple's standard for high-quality music. 192 kbps offers excellent quality for most uses, while 128 kbps is suitable for podcasts and spoken word.
Can I add metadata to M4A files?
Yes, M4A supports rich metadata including cover art, album information, lyrics, and chapter markers, making it ideal for music libraries and podcasts.