Convert AAC to CAF
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.
Drag & Drop Audio File
or click below to browse
Supported formats (Max 50MB, 30 min • Sign in for 200MB, 1 hr)
Why Choose Scriptivox AAC to CAF Converter?
Fast Conversion
Our powerful servers process your files quickly, delivering converted files in seconds.
100% Free
Convert your files completely free with no hidden costs or subscription fees.
Secure & Private
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 AAC → CAF
Upload File
Drag and drop your AAC file or click to browse. Supports files up to 1GB.
Convert
Select CAF 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.
AAC vs CAF: format comparison
How the two formats differ on the things that change your result.
| Specification | AAC (source) | CAF (result) |
|---|---|---|
| Container | ADTS / raw AAC | Core Audio Format |
| Developed by | MPEG / Fraunhofer IIS | Apple |
| Introduced | 1997 | 2005 |
| Audio codecs | AAC-LC, HE-AAC | PCM, ALAC, AAC, Opus |
| Compression | Lossy | Depends on codec |
| Max sample rate | 96 kHz | 192 kHz |
| Max channels | 8 | 8 |
| Gapless playback | Partial | Yes |
| Metadata / tags | ID3v2 (limited in ADTS) | CAF metadata chunks |
| Approx. file size | 0.72–1.92 MB per minute | 1–32 MB per minute |
| Licensing | Patent-licensed | Proprietary |
| Plays natively on | Native: Web browsers, Windows, macOS, iOS, Android, Smart TVs | Native: macOS, iOS · Needs a player: Windows, Web browsers |
| Best for | streaming services, mobile playback, broadcast | iOS development, the Apple ecosystem, very long recordings |
What changes when you convert AAC to CAF
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 direction reduces compatibility rather than improving it, with 4 platforms losing native support. It is the right choice for a specific workflow, not for sharing widely.
This conversion moves the file toward a different purpose: AAC suits streaming services, mobile playback, broadcast, whereas CAF is chosen for iOS development, the Apple ecosystem, very long recordings.
Tags do not transfer verbatim. AAC stores them as ID3v2 (limited in ADTS) while CAF uses CAF metadata chunks, so titles and artwork are remapped and unusual custom fields may not survive.
About AAC to CAF Conversion
Converting AAC to CAF means moving audio out of the ADTS / raw AAC container, introduced in 1997, 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 MPEG / Fraunhofer IIS in 1997, AAC stores audio using AAC-LC, HE-AAC. That codec choice sets the upper bound on what any conversion can preserve.
CAF, from Apple and dating to 2005, uses PCM, ALAC, AAC, Opus and plays natively on 2 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.
AAC to CAF: common questions
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