How to convert AAC to M4R
- Add your .AAC file - drop it in the box above or click to browse.
- Convert it to .M4R in a few seconds.
- Download your new .M4R file.
What to expect
- M4R uses AAC audio, so fidelity tracks the source closely; it remains a lossy format with no quality gain.
- Ringtones are expected to be short (about 30-40 seconds); long clips may not function as tones.
- The format's purpose is iOS ringtones, not general music playback or archiving.
Frequently asked questions
What is the quality of an AAC to M4R conversion?
M4R is Apple's iPhone ringtone format and is based on AAC audio, so quality stays close to the source. As a re-encode of an already-lossy file it does not add quality, but it also does not degrade it much.
Why convert AAC to M4R?
M4R is the format iPhones expect for custom ringtones. Converting an AAC clip lets it be used as a ringtone or alert tone on iOS.
Is there a length limit for ringtones?
iPhone ringtones are meant to be short, generally trimmed to roughly 30-40 seconds. A long AAC should be cut to a short segment before or after converting for it to work as a ringtone.
Where will an M4R file play back?
M4R is essentially AAC in an MP4-style container, so general players that handle AAC can usually play it, but its intended home is the iOS ringtone system rather than a music library.
