Convert AMR to CAF
AMR is great for call recordings and voice memos from older phones, but CAF is the better choice for iOS app sounds and Apple developer workflows. Convert AMR 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 AMR to CAF
- 1
Tap Choose files and select one or more AMR 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.
AMR vs CAF
CAF is lossless, but it can't restore detail already removed by AMR's compression — the file just gets bigger. Convert when an app or editor requires CAF.
| AMR | CAF | |
|---|---|---|
| Full name | Adaptive Multi-Rate | Core Audio Format |
| Type | Audio | Audio |
| Compression | Lossy | Lossless |
| Developed by | 3GPP / Ericsson | Apple |
| Introduced | 1999 | 2005 |
| Plays on iPhone | ✕ No | ✓ Yes |
| Plays on Android | ✓ Yes | ✕ No |
| Plays on Windows | ◐ Partly / with an app | ✕ No |
| Plays on Mac | ✕ No | ✓ Yes |
About AMR and CAF
AMR: AMR is a speech codec made for mobile phones. Older Android and Nokia phones, call recorders and voice-memo apps save recordings as .amr files, which many computers cannot open.
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 AMR to CAF on my phone?
Will converting AMR to CAF reduce quality?
Is this AMR to CAF converter free?
Are my files uploaded to a server?
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