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.
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Max file size: 50 MBMax duration: 30 min
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Drag and drop your WebM Audio 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.
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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 | WebM Audio (source) | CAF (result) |
|---|---|---|
| Container | WebM (audio-only) | Core Audio Format |
| Developed by | Apple | |
| Introduced | 2010 | 2005 |
| Audio codecs | Opus, Vorbis | PCM, ALAC, AAC, Opus |
| Compression | Lossy | Depends on codec |
| Max sample rate | 48 kHz | 192 kHz |
| Max channels | 8 | 8 |
| Gapless playback | Partial | Yes |
| Metadata / tags | Matroska tags | CAF metadata chunks |
| Approx. file size | 0.48–1.92 MB per minute | 1–32 MB per minute |
| Licensing | Royalty-free | Proprietary |
| Plays natively on | Native: Web browsers, Android · Needs a player: Windows, macOS, iOS | Native: macOS, iOS · Needs a player: Windows, Web browsers |
| Best for | web delivery, HTML5 video, open-source projects | 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 WebM Audio, 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: WebM Audio suits web delivery, HTML5 video, open-source projects, whereas CAF is chosen for iOS development, the Apple ecosystem, very long recordings.
Tags do not transfer verbatim. WebM Audio stores them as Matroska tags while CAF uses CAF metadata chunks, so titles and artwork are remapped and unusual custom fields may not survive.
Note that CAF is vendor-controlled where WebM Audio is open, so plan for a player that supports it wherever the file ends up.
Converting WebM Audio to CAF means moving audio out of the WebM (audio-only) container, introduced in 2010, 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 Google in 2010, WebM Audio carries lossy-compressed audio (Opus or Vorbis). 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.
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