AAC to M4R Converter
Convert AAC files to M4R in seconds, right in your browser. Drop in one file or a whole folder, pick your quality settings and download - nothing is uploaded to a server.
Drop AAC files here
MP3, WAV, FLAC, M4A, OGG, OPUS, AAC, AIFF, WMA, AMR, MP4, MOV & more · Processed on your device - nothing is uploaded
How to convert AAC to M4R
- Click "Choose files" or drag your AAC files onto the page.
- Make sure "M4R" is selected as the output format (256 kbps is a good default).
- Click Edit to select the best 30-40 seconds of the song, then Trim.
- Click Convert, then Download your M4R files.
Why convert AAC to M4R?
M4R may be better supported by your device or app. To keep quality, choose a bitrate equal to or higher than the original AAC.
M4R is the only format iPhone accepts for custom ringtones. Trim your clip to 40 seconds or less.
M4R is best for custom iPhone ringtones and alert tones. iPhone (via Finder, iTunes or GarageBand), macOS.
Will I lose quality?
Converting between two lossy formats re-encodes the audio, which can add a small amount of loss. Use a bitrate at least as high as the original (256 kbps or more) to keep it transparent.
AAC vs M4R
| AAC | M4R | |
|---|---|---|
| Full name | Advanced Audio Coding (ADTS) | iPhone Ringtone (AAC) |
| Type | lossy | lossy |
| Best for | streaming, broadcast and devices that need a raw AAC stream | custom iPhone ringtones and alert tones |
| Typical size | ~1.4 MB at 192 kbps per minute | ~1.9 MB at 256 kbps per minute |
| Compatibility | Most phones, browsers, smart TVs and media players. | iPhone (via Finder, iTunes or GarageBand), macOS. |
| Developed by | MPEG (1997) | Apple (2007) |
AAC to M4R: questions
How do I convert AAC to M4R?
Open this page, add your AAC file, make sure M4R is selected as the output format and click Convert. Your M4R file is ready to download in seconds.
Will converting AAC to M4R lose quality?
Converting between two lossy formats re-encodes the audio, which can add a small amount of loss. Use a bitrate at least as high as the original (256 kbps or more) to keep it transparent.
Is this AAC to M4R converter free and safe?
Yes. It's free with no watermark or sign-up. Files are processed locally in your browser, so your audio is never uploaded or stored on our servers.
Can I convert many AAC files to M4R at once?
Yes - add up to 5 files at a time on the free plan (unlimited with Pro), convert them all with one click and download them as a ZIP.
What is the difference between AAC and M4R?
AAC (Advanced Audio Coding (ADTS)) is a compressed (lossy) format, raw AAC audio stream. The successor to MP3 used by YouTube, iPhone and digital radio. M4R (iPhone Ringtone (AAC)) is a compressed (lossy) format: the iPhone ringtone format - AAC audio with an .m4r extension, limited to 40 seconds.
Does it work on Mac, Windows, iPhone and Android?
Yes. The AAC to M4R converter runs in any modern browser - Chrome, Safari, Edge or Firefox - on desktop and mobile. No software to install.