Convert M4R to AAC
M4R is great for custom iPhone ringtones and text tones, but AAC is the better choice for efficient music files and broadcast audio. Convert M4R to AAC in seconds, right in your browser.
- No upload — 100% private
- Fast, lossless when possible
- Free & unlimited
- Works on iPhone & Android
Keep this tab open — the conversion runs on your device, nothing is uploaded.
Add more files above to keep converting.
How to convert M4R to AAC
- 1
Tap Choose files and select one or more M4R files (or drag them in).
- 2
Check that AAC is selected. Use Advanced options for bitrate, channels or trimming.
- 3
Press Convert. Everything happens on your device — no upload, no waiting in a queue.
- 4
Your AAC downloads automatically. Converting several files? Grab them all as a ZIP.
M4R vs AAC
Both formats are lossy, so the audio is re-encoded once. Pick High quality to keep it as close to the original as possible, or Small for the smallest file.
| M4R | AAC | |
|---|---|---|
| Full name | iPhone Ringtone (AAC) | Advanced Audio Coding (raw ADTS) |
| Type | Audio | Audio |
| Compression | Lossy | Lossy |
| Developed by | Apple | MPEG |
| Introduced | 2007 | 1997 |
| Plays on iPhone | ✓ Yes | ✓ Yes |
| Plays on Android | ✕ No | ✓ Yes |
| Plays on Windows | ◐ Partly / with an app | ✓ Yes |
| Plays on Mac | ✓ Yes | ✓ Yes |
About M4R and AAC
M4R: M4R is the iPhone ringtone format. It is an AAC audio file (the same as M4A) with a different extension, and iOS only accepts ringtones up to 30–40 seconds long.
AAC: AAC is the successor to MP3 and the audio codec behind YouTube, iTunes and most streaming services. A .aac file stores the raw AAC stream without an MP4 wrapper.
Frequently asked questions
How do I convert M4R to AAC on my phone?
Will converting M4R to AAC reduce quality?
Is this M4R to AAC converter free?
Are my files uploaded to a server?
Rate this tool
Be the first to rate it.
Thanks for rating! ❤️