Convert CAF to OPUS
CAF is great for iOS app sounds and Apple developer workflows, but OPUS is the better choice for voice messages, calls and streaming at low bitrates. Convert CAF to OPUS 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 CAF to OPUS
- 1
Tap Choose files and select one or more CAF files (or drag them in).
- 2
Check that OPUS 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 OPUS downloads automatically. Converting several files? Grab them all as a ZIP.
CAF vs OPUS
OPUS uses lossy compression, which makes the file much smaller than CAF. Choose High quality and the difference is inaudible for most listeners.
| CAF | OPUS | |
|---|---|---|
| Full name | Core Audio Format | Opus Audio |
| Type | Audio | Audio |
| Compression | Lossless | Lossy |
| Developed by | Apple | IETF / Xiph.Org |
| Introduced | 2005 | 2012 |
| Plays on iPhone | ✓ Yes | ◐ Partly / with an app |
| Plays on Android | ✕ No | ✓ Yes |
| Plays on Windows | ✕ No | ✓ Yes |
| Plays on Mac | ✓ Yes | ✓ Yes |
About CAF and OPUS
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.
OPUS: Opus is a modern, highly efficient codec used by WhatsApp voice notes, Discord, Zoom and WebRTC calls. It sounds excellent even at very low bitrates.
Frequently asked questions
How do I convert CAF to OPUS on my phone?
Will converting CAF to OPUS reduce quality?
Is this CAF to OPUS converter free?
Are my files uploaded to a server?
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