How to use it
- Add your files. Drop M4A files on the page or use Choose files. Folders and ZIPs work too.
- Check that M4R is selected. M4R is already chosen on this page.
- Adjust options if you need to. Quality, size and other settings appear when the format has them.
- Convert and download. Press Convert; with several files, “Download all” gives you one ZIP.
What happens to your file
The audio is decoded and encoded as M4R at the bit rate you choose.
M4R is lossy, so pick a bit rate at least as high as the original’s to avoid audible loss.
About M4A and M4R
M4A: M4A is AAC audio in an MP4 container, used by iPhone voice memos and Apple Music.
M4R: M4R is the iPhone ringtone format: AAC audio of up to 40 seconds.
Questions
Is my M4A file uploaded?
No. The conversion runs inside this browser tab, and the M4R is created on your device. Nothing is sent to a server.
Anything to know about M4R?
Ringtones are cut to the 40 seconds iPhones allow.
Is there a file size limit?
No fixed limit: files are processed by your device, so very large videos depend on its memory. Computers handle several GB; phones are best with smaller files.
Can I convert several M4A files at once?
Yes. Drop as many as you like, a folder or a ZIP; “Download all” saves every M4R in one ZIP.