AAC to M4R
Convert AAC to M4R audio.
Your file
AAC to M4R — free and private
Convert AAC to M4R audio. Everything runs inside your browser using a WebAssembly build of FFmpeg, so your file is never uploaded, queued, or stored on a server.
Why use this tool
No upload, no waiting room
Other converters queue your file on a shared server. Here the work happens on your own machine, which also means there is no file-size cap imposed by a free plan.
Genuinely private
Nothing leaves the tab. Unreleased footage, client work and personal recordings stay on your device from start to finish.
Real FFmpeg under the hood
The same encoder chain used by professional video tooling, compiled to WebAssembly — not a lossy re-wrap that quietly degrades quality.
Works on any modern browser
Chrome, Edge, Firefox and Safari on desktop, plus recent mobile browsers. Nothing to install and no account needed.
Frequently asked questions
Runs in your browser
The file is processed on your own machine with a WebAssembly build of FFmpeg. Nothing is uploaded, and nothing is stored anywhere.
Good to know
- The first run downloads the converter once, then it is cached.
- Clips under a couple of minutes convert fastest.
- Keep the tab in the foreground while it works.
- M4R is an iPhone ringtone — keep it under 40 seconds.