Convert any M4A file to MP3 — free, private, entirely in your browser.
Click "Start Converting — Free" to launch the converter in your browser.
Drag and drop your M4A file or click to browse. Choose MP3 as the output format.
Conversion runs locally via WebAssembly. Download your MP3 file instantly.
Files never leave your device. M4A→MP3 conversion is 100% client-side.
No registration, no watermarks, no usage limits — ever.
Uses open-source FFmpeg compiled to WebAssembly for native-speed conversion.
Works in Chrome, Firefox, Edge, and Safari on desktop and mobile.
Convert multiple files using the built-in queue without reloading the page.
Yes. AnyConvert uses open-source FFmpeg via WebAssembly — no cost, no sign-up, no limits.
No. All conversion happens in your browser using WebAssembly. Your files never leave your device.
There is no server-side limit. The practical limit depends on your device's available memory — most files under 500 MB work fine.
M4A is Apple's audio container (AAC codec) used by iTunes and iOS. While high quality, it has limited support outside the Apple ecosystem.
A small amount of quality is lost since both formats use lossy compression, but at 192+ kbps the difference is inaudible to most people.
Open AnyConvert in your mobile browser, select your M4A file, choose MP3 as output, and download. No app needed.