High Quality MP3 to AAC
Get the highest quality AAC from your MP3 files. AudioUtils uses optimized encoder settings tuned for fidelity, not just speed.
Drop your MP3 file here or click to browse
MP3 (.mp3) · Max 20 MB
The converter defaults to the highest practical bitrate for AAC. For lossy output, that means 320kbps or VBR quality 0. Transparent quality for virtually all listeners.
Garbage in, garbage out. The output quality depends on your source. A 128kbps MP3 file won't sound better in AAC. Start with the best source available.
AudioUtils processes everything locally using WebAssembly. The encoder runs at near-native speed. A 10-minute file converts in seconds with maximum quality settings.
Frequently Asked Questions
Does converting MP3 to AAC improve quality?
No — you can't improve quality by converting between lossy formats. The benefit comes from using AAC as your target format from the start, where it outperforms MP3.
Where is AAC used?
YouTube, Spotify, Apple Music, and most streaming platforms use AAC. It's also the default codec for iPhone, iPad, and modern Android devices.
What's the difference between AAC and M4A?
AAC is the codec (compression algorithm). M4A is the file container that typically holds AAC audio. They're closely related.
Should I switch from MP3 to AAC?
For new audio, yes — AAC is better. For existing MP3 libraries, the quality gain from transcoding is minimal and may introduce artifacts.
About MP3
The most widely used audio format. Great compatibility, small file size. Ideal for music, podcasts, and general use.
About AAC
Advanced Audio Coding. Successor to MP3 with improved compression. Widely used in streaming services.