Convert CAF to M4R
Fast, free CAF to M4R conversion — works in any browser
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caf
Core Audio Format
| File extension | .caf |
|---|---|
| File category | audio |
| Programs | Apple QuickTime Player Apple iTunes VLC media player Audacity |
| Tech description | https://en.wikipedia.org/wiki/Core_Audio_Format |
| MIME type | audio/x-caf |
| Developer | Apple Inc. |
This audio file container was created by Apple's developers. CAF can store a lot of information: the artist's name, song duration, album and track names, and more. In terms of size, CAF files can exceed 4 GB. Since its introduction in 2005, the Core Audio Format has been used as an alternative to AIFF and WAV. It can use different codecs, so audio quality depends on the chosen encoding. CAF files are often used to store audio assets and sound effects.
m4r
M4R: the ringtone file used in Apple iOS
| File extension | .m4r |
|---|---|
| File category | audio |
| Programs | Apple iTunes GarageBand Audacity |
| Tech description | https://en.wikipedia.org/wiki/M4A |
| MIME type | audio/x-m4r |
| Developer | Apple Inc. |
The M4R format is used on Apple's mobile devices, mostly for storing ringtones. You can create an M4R file by converting other formats or downloading it from the iTunes Store. M4R is based on the standardized MPEG-4 format and is commonly encoded with AAC audio. One of its strengths is good sound quality at a small file size.
FAQ
How to convert M4R to CAF?
Upload your M4R file, select CAF as the output format, and click Convert. The converted file will be ready to download in seconds — no account or installation required.
How long does it take to convert M4R to CAF?
Most M4R files convert in seconds. Larger files may take up to a few minutes depending on size and internet speed. You can track the progress bar in real time during conversion.
Is it safe to convert M4R files online?
Yes. All uploaded M4R files and converted CAF results are automatically deleted from our servers within 1 hour after conversion. We do not store, share, or access your files.
Can I convert M4R on iPhone or Android?
Yes, our converter works on all devices and operating systems — iPhone, iPad, Android, Windows, and macOS. Open the site in your mobile browser, upload the M4R file and convert to CAF without installing any app.
