Free MP3 to M4A Converter
Convert MP3 to M4A (AAC) format — better quality at smaller file sizes, perfect for Apple devices.
- Free
- No sign-up
- Stays on your device
Why use this converter
100% Private
All conversion happens in your browser. Your audio never touches our servers.
Fast Conversion
Powered by FFmpeg.wasm — convert files in seconds directly in the browser.
No File Uploads
Your files stay on your device. Zero privacy risk, zero data retention.
Instant Download
Converted file downloads immediately — no email, no waiting, no account.
No Limits
Convert unlimited files. No file size caps, no daily limits.
Works Everywhere
Any modern browser on Windows, Mac, Linux, iOS or Android.
Frequently asked questions
Yes — 100% free with no account required. Convert unlimited files directly in your browser.
No. All conversion happens locally in your browser using WebAssembly technology. Your audio never leaves your device.
AAC (M4A) achieves better quality than MP3 at the same bitrate.
Common uses: iPhone, iPad, Mac, Apple Music, iTunes libraries.
There is no enforced limit, but very large files (>500 MB) may be slow depending on your device memory.
Chrome, Firefox, Edge, and Safari (version 15.4+). WebAssembly support is required.
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