Convert CAF to AAC
Convert any audio file to AAC format online for free. Fast, secure, and easy-to-use audio to AAC converter with no software installation required.
Drag & Drop Audio File
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Supported formats (Max 50MB, 30 min • Sign in for 200MB, 1 hr)
Why Choose Scriptivox CAF to AAC Converter?
Fast Conversion
Our powerful servers process your files quickly, delivering converted files in seconds.
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Your files are encrypted and automatically deleted after conversion. We never store or share your data.
No Installation
Works directly in your web browser. No software download or installation required.
How to Use CAF → AAC
Upload File
Drag and drop your CAF file or click to browse. Supports files up to 1GB.
Convert
Select AAC as your output format and click convert. Our servers will process your file instantly.
Download
Download your converted file instantly. The download link expires in 1 hour for security.
CAF vs AAC: format comparison
How the two formats differ on the things that change your result.
| Specification | CAF (source) | AAC (result) |
|---|---|---|
| Container | Core Audio Format | ADTS / raw AAC |
| Developed by | Apple | MPEG / Fraunhofer IIS |
| Introduced | 2005 | 1997 |
| Audio codecs | PCM, ALAC, AAC, Opus | AAC-LC, HE-AAC |
| Compression | Depends on codec | Lossy |
| Max sample rate | 192 kHz | 96 kHz |
| Max channels | 8 | 8 |
| Gapless playback | Yes | Partial |
| Metadata / tags | CAF metadata chunks | ID3v2 (limited in ADTS) |
| Approx. file size | 1–32 MB per minute | 0.72–1.92 MB per minute |
| Licensing | Proprietary | Patent-licensed |
| Plays natively on | Native: macOS, iOS · Needs a player: Windows, Web browsers | Native: Web browsers, Windows, macOS, iOS, Android, Smart TVs |
| Best for | iOS development, the Apple ecosystem, very long recordings | streaming services, mobile playback, broadcast |
What changes when you convert CAF to AAC
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.
CAF can carry sample rates up to 192 kHz, but AAC tops out at 96 kHz. High-resolution sources are resampled down on the way through.
This conversion buys reach. AAC is natively supported on 4 additional platforms compared with CAF, which is usually the reason people convert in this direction.
This conversion moves the file toward a different purpose: CAF suits iOS development, the Apple ecosystem, very long recordings, whereas AAC is chosen for streaming services, mobile playback, broadcast.
Tags do not transfer verbatim. CAF stores them as CAF metadata chunks while AAC uses ID3v2 (limited in ADTS), so titles and artwork are remapped and unusual custom fields may not survive.
About CAF to AAC Conversion
Converting CAF to AAC means moving audio out of the Core Audio Format container, introduced in 2005, and into ADTS / raw AAC, which arrived in 1997. The two were designed with different priorities, and that is what determines whether this conversion costs you quality, storage, or compatibility.
Developed by Apple in 2005, CAF stores audio using PCM, ALAC, AAC, Opus. That codec choice sets the upper bound on what any conversion can preserve.
AAC, from MPEG / Fraunhofer IIS and dating to 1997, uses AAC-LC, HE-AAC and plays natively on 6 of the six platform categories we track. That combination is usually why people convert into it.
After converting your file, you can use Scriptivox transcription services to convert your audio to text. Perfect for meetings, interviews, podcasts, and more.
CAF to AAC: common questions
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