Convert MP3 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 MP3 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.
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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 MP3 → CAF
Upload File
Drag and drop your MP3 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.
MP3 vs CAF: format comparison
How the two formats differ on the things that change your result.
| Specification | MP3 (source) | CAF (result) |
|---|---|---|
| Container | MPEG-1/2 Audio Layer III | Core Audio Format |
| Developed by | Fraunhofer IIS / MPEG | Apple |
| Introduced | 1993 | 2005 |
| Audio codecs | MP3 | PCM, ALAC, AAC, Opus |
| Compression | Lossy | Depends on codec |
| Max sample rate | 48 kHz | 192 kHz |
| Max channels | 2 | 8 |
| Gapless playback | Partial | Yes |
| Metadata / tags | ID3v2 | CAF metadata chunks |
| Approx. file size | 0.96–2.4 MB per minute | 1–32 MB per minute |
| Licensing | Patents expired | Proprietary |
| Plays natively on | Native: Web browsers, Windows, macOS, iOS, Android, Smart TVs | Native: macOS, iOS · Needs a player: Windows, Web browsers |
| Best for | music libraries, podcasts, sharing with anyone | iOS development, the Apple ecosystem, very long recordings |
What changes when you convert MP3 to CAF
Core Audio Format is a container rather than a single codec, so what it holds depends on how the file was made. It can carry PCM, ALAC, AAC, Opus, which means two files with the same extension can differ in quality and size. Check the source before assuming which one you have.
Be aware that you are narrowing playback: MP3 is natively supported on 4 platforms where CAF is not. Convert this way when you need the format specifically, not for portability.
The two formats are aimed at different jobs. MP3 is typically used for music libraries, podcasts, sharing with anyone, while CAF is the usual pick for iOS development, the Apple ecosystem, very long recordings. That difference in intent is what most of the specification gaps above come from.
Expect metadata to be rewritten rather than copied: ID3v2 in the source becomes CAF metadata chunks in the result. Standard fields map cleanly; niche custom tags often do not.
About MP3 to CAF Conversion
This page converts MP3 files, stored in the MPEG-1/2 Audio Layer III container since 1993, into CAF, which uses Core Audio Format and dates from 2005. The differences between the two containers decide what changes in the result.
MP3 comes from Fraunhofer IIS / MPEG and dates to 1993. It carries MP3, which is what determines the quality ceiling of anything you convert out of it.
CAF was introduced by Apple in 2005. It carries PCM, ALAC, AAC, Opus and has native playback on 2 of six platform categories, which is the practical reason to choose it as a target.
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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