Convert CAF to M4A
Convert any audio file to M4A format online for free. Fast, secure, and easy-to-use audio to M4A 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 M4A Converter?
Fast Conversion
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No Installation
Works directly in your web browser. No software download or installation required.
How to Use CAF → M4A
Upload File
Drag and drop your CAF file or click to browse. Supports files up to 1GB.
Convert
Select M4A as your output format and click convert. Our servers will process your file instantly.
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Download your converted file instantly. The download link expires in 1 hour for security.
CAF vs M4A: format comparison
How the two formats differ on the things that change your result.
| Specification | CAF (source) | M4A (result) |
|---|---|---|
| Container | Core Audio Format | MPEG-4 Part 14 |
| Developed by | Apple | Apple / MPEG |
| Introduced | 2005 | 2003 |
| Audio codecs | PCM, ALAC, AAC, Opus | AAC-LC, HE-AAC, ALAC |
| Compression | Depends on codec | Depends on codec |
| Max sample rate | 192 kHz | 96 kHz |
| Max channels | 8 | 8 |
| Gapless playback | Yes | Yes |
| Metadata / tags | CAF metadata chunks | MPEG-4 iTunes-style atoms |
| 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 | the Apple ecosystem, music libraries, audiobooks |
What changes when you convert CAF to M4A
MPEG-4 Part 14 is a container rather than a single codec, so what it holds depends on how the file was made. It can carry AAC-LC, HE-AAC, ALAC, which means two files with the same extension can differ in quality and size. Check the source before assuming which one you have.
If your source runs above 96 kHz, it will be resampled: M4A cannot store the 192 kHz that CAF allows.
Compatibility is the main win here: M4A plays natively on 4 more of the platforms we track than CAF does, so the result works without asking anyone to install a player.
The two formats are aimed at different jobs. CAF is typically used for iOS development, the Apple ecosystem, very long recordings, while M4A is the usual pick for the Apple ecosystem, music libraries, audiobooks. That difference in intent is what most of the specification gaps above come from.
Expect metadata to be rewritten rather than copied: CAF metadata chunks in the source becomes MPEG-4 iTunes-style atoms in the result. Standard fields map cleanly; niche custom tags often do not.
About CAF to M4A Conversion
This page converts CAF files, stored in the Core Audio Format container since 2005, into M4A, which uses MPEG-4 Part 14 and dates from 2003. The differences between the two containers decide what changes in the result.
CAF comes from Apple and dates to 2005. It carries PCM, ALAC, AAC, Opus, which is what determines the quality ceiling of anything you convert out of it.
M4A was introduced by Apple / MPEG in 2003. It carries AAC-LC, HE-AAC, ALAC and has native playback on 6 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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