Convert MP3 to CAF
MP3 is great for sharing music, podcasts and ringtones that play on every device, but CAF is the better choice for iOS app sounds and Apple developer workflows. Convert MP3 to CAF in seconds, right in your browser.
- No upload — 100% private
- Fast, lossless when possible
- Free & unlimited
- Works on iPhone & Android
Keep this tab open — the conversion runs on your device, nothing is uploaded.
Add more files above to keep converting.
How to convert MP3 to CAF
- 1
Tap Choose files and select one or more MP3 files (or drag them in).
- 2
Check that CAF is selected. Use Advanced options for bitrate, channels or trimming.
- 3
Press Convert. Everything happens on your device — no upload, no waiting in a queue.
- 4
Your CAF downloads automatically. Converting several files? Grab them all as a ZIP.
MP3 vs CAF
CAF is lossless, but it can't restore detail already removed by MP3's compression — the file just gets bigger. Convert when an app or editor requires CAF.
| MP3 | CAF | |
|---|---|---|
| Full name | MPEG-1 Audio Layer III | Core Audio Format |
| Type | Audio | Audio |
| Compression | Lossy | Lossless |
| Developed by | Fraunhofer IIS | Apple |
| Introduced | 1993 | 2005 |
| Plays on iPhone | ✓ Yes | ✓ Yes |
| Plays on Android | ✓ Yes | ✕ No |
| Plays on Windows | ✓ Yes | ✕ No |
| Plays on Mac | ✓ Yes | ✓ Yes |
About MP3 and CAF
MP3: MP3 is the most widely supported audio format in the world. It uses lossy compression to make music and voice files small enough to share, while keeping quality good enough for everyday listening.
CAF: CAF is Apple's flexible audio container used inside iOS and macOS apps and by GarageBand. Files can be any length and hold many codecs.
Frequently asked questions
How do I convert MP3 to CAF on my phone?
Will converting MP3 to CAF reduce quality?
Is this MP3 to CAF converter free?
Are my files uploaded to a server?
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