Turn M4A audio files into CAF. It is converted in your browser, so the file never leaves your device.
Drop M4A files here
or choose from your computer paste with Ctrl V
from Photos or Files
Ready · other file types work too0 bytes uploaded, ever
Drop M4A files onto the box above, or click it to choose them. ToAny reads the file's contents to detect the type, so a wrong extension does not matter.
Press Convert. Open Options first if you want to change the defaults. The work happens in this tab.
Save the CAF, or download everything as one ZIP if you converted several files.
The M4A to CAF converter is part of this page and runs inside your browser. Your audio files are never sent to ToAny or to anyone else.
Nothing has to travel to a server and back, so the conversion starts the moment you press Convert, even on a slow connection.
No sign-up, no email address and no watermark. Add several files and download them together as a ZIP.
M4A is refused by some car stereos, older players, editors and upload forms. CAF is what Apple's audio tools and iOS apps use. M4A is at home in music and voice memos on Apple devices; CAF is the usual choice for audio inside Apple's apps and development tools.
The defaults suit most files. Under Options you can trim the start and end.
This pair uses the compatibility engine, ffmpeg built for the browser, because CAF cannot be written by the browser's built-in codecs. It is a one-off download of about 10 MB that the browser keeps, it is slower than the built-in codecs, and it takes files up to 1 GB.
M4A is an MP4 file that contains only audio, usually AAC. iPhone Voice Memos and the iTunes Store use it. It sounds better than MP3 at the same size but is not accepted everywhere MP3 is.
Opens in Apple devices, Android, current browsers; some car stereos and older players do not
M4A converterCAF is a flexible audio container that Apple introduced with Mac OS X Tiger. It can hold almost any codec and has no practical file size limit, unlike WAV or AIFF. It is common in Apple's developer tools and in apps built on Core Audio.
Opens in macOS and iOS apps such as GarageBand, Logic and QuickTime; fewer players elsewhere
CAF converter| M4AM4A audio | CAFCore Audio Format | |
|---|---|---|
| Stands for | MPEG-4 Audio | Core Audio Format |
| Type | Audio | Audio |
| Compression | Lossy (AAC); lossless when it holds ALAC | Depends on what is inside |
| Usually contains | AAC, sometimes Apple Lossless | PCM, AAC, Apple Lossless and others |
| Introduced | The early 2000s, by the Moving Picture Experts Group (popularised by Apple) | 2005, by Apple |
| Opens in | Apple devices, Android, current browsers; some car stereos and older players do not | macOS and iOS apps such as GarageBand, Logic and QuickTime; fewer players elsewhere |
| Best for | Music and voice memos on Apple devices | Audio inside Apple's apps and development tools |
| File extension | .m4a | .caf |
No. The M4A to CAF conversion runs inside your browser, on your own phone or computer. The file is not sent to ToAny or to anyone else.
It depends on the file. ToAny keeps as much of the original as CAF can hold.
Yes. Add as many as you like, convert them together and download each result or all of them as one ZIP.
The steps are the same everywhere because ToAny runs in the web browser: open this page in a current version of Chrome, Edge, Safari or Firefox, add the M4A file, press Convert and save the CAF. There is nothing to install.
Yes. M4A to CAF runs on the compatibility engine, which takes files up to 1 GB, and a long clip takes a while because it is slower than the browser's built-in codecs. Beyond that the limit is your device's memory, since nothing is uploaded; a computer copes with large files better than a phone.