Convert any audio file to CAF format online for free. Fast, secure, and easy-to-use audio to CAF converter with no software installation required.
or click below to browse
Max file size: 50 MBMax duration: 30 min
Sign up for increased limitsA free account gets you up to 50 MB and 30 min.
Drag and drop your WMA file, or click to browse for it.
Choose CAF as the output and click Convert. The conversion runs on our servers, so your device does none of the work.
Download your converted file instantly. The download link expires in 1 hour for security.
Our powerful servers process your files quickly, delivering converted files in seconds.
Convert your files completely free with no hidden costs or subscription fees.
Your file is used only to make your conversion. It is never published or shared, and the download link expires after one hour.
Works directly in your web browser. No software download or installation required.
How the two formats differ on the things that change your result.
| Specification | WMA (source) | CAF (result) |
|---|---|---|
| Container | ASF | Core Audio Format |
| Developed by | Microsoft | Apple |
| Introduced | 1999 | 2005 |
| Audio codecs | WMA, WMA Pro | PCM, ALAC, AAC, Opus |
| Compression | Lossy | Depends on codec |
| Max sample rate | 48 kHz | 192 kHz |
| Max channels | 8 | 8 |
| Gapless playback | No | Yes |
| Metadata / tags | ASF / WM tags | CAF metadata chunks |
| Approx. file size | 0.48–1.44 MB per minute | 1–32 MB per minute |
| Licensing | Proprietary | Proprietary |
| Plays natively on | Native: Windows · Needs a player: macOS, iOS, Android | Native: macOS, iOS · Needs a player: Windows, Web browsers |
| Best for | Windows media libraries, legacy archives | iOS development, the Apple ecosystem, very long recordings |
Note that Core Audio Format does not imply one specific codec. It can wrap PCM, ALAC, AAC, Opus, so the compression behaviour of the result depends on the codec chosen rather than on the extension alone.
This conversion buys reach. Unlike WMA, CAF is natively supported on macOS and iOS, which is usually the reason people convert in this direction.
This conversion moves the file toward a different purpose: WMA suits Windows media libraries, legacy archives, whereas CAF is chosen for iOS development, the Apple ecosystem, very long recordings.
Tags do not transfer verbatim. WMA stores them as ASF / WM tags while CAF uses CAF metadata chunks, so titles and artwork are remapped and unusual custom fields may not survive.
Converting WMA to CAF means moving audio out of the ASF container, introduced in 1999, and into Core Audio Format, which arrived in 2005. The two were designed with different priorities, and that is what determines whether this conversion costs you quality, storage, or compatibility.
Developed by Microsoft in 1999, WMA carries lossy-compressed audio (WMA or WMA Pro). That sets the upper bound on what any conversion can preserve.
CAF was introduced by Apple in 2005. It holds audio in whichever codec it was encoded with (PCM, ALAC, AAC, or Opus) and plays natively on macOS and iOS.
After converting your file, you can use Scriptivox transcription services to convert your audio to text. Perfect for meetings, interviews, podcasts, and more.
Quick access to the most commonly used file conversions
And many more format conversions supported