All Tools
[ audio bench ]
CAF to GSM - Online Audio Converter
Convert CAF to GSM online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
Convert CAF to GSM
Drop CAF audio here or click to select
CAF
GSM (GSM)
About CAF to GSM
Convert CAF to GSM. CAF is Apple's 64-bit container for large recordings beyond WAV limits. GSM 06.10 encodes European mobile speech at 13 kbps. Carrier framing can offset timing; verify duration..
Why convert CAF to GSM?
- Smaller files with GSM lossy compression.
- Keep quality where supported.
- Private, no upload - runs in your browser.
CAF vs GSM
| Codec | PCM 16-bit | GSM |
|---|---|---|
| Compression | uncompressed | lossy |
| Sample behavior | Full quality kept | Quality set by bitrate |
| Typical use | CAF is Apple's 64-bit container for large recordings beyond WAV limits. | GSM 06.10 encodes European mobile speech at 13 kbps. |
When not to convert CAF to GSM
- Skip GSM for archival masters: lossy compression discards detail, so keep the CAF original.
- Keep a master copy: repeated exports stack small losses, so archive CAF before batch GSM shares.
Limits
Starting point: CAF - CAF is Apple's 64-bit container for large recordings beyond WAV limits. Few Windows tools open it; convert WAV for sharing. Carrier framing can offset timing; verify duration. Encode GSM (GSM) from CAF at 256k for music or 128k for speech, starting from the master.
How conversion works
Conversion runs entirely in your browser with FFmpeg WASM. Files never leave your device.
Related conversions
FAQ
How do I convert CAF to GSM?
Drop your CAF file onto this page, choose quality and codec settings, then click Convert. The result downloads as GSM instantly. All processing runs in your browser.
What codec is used for GSM?
The default codec for GSM is GSM. You can change audio parameters in Advanced mode.
How do you store my files?
We do not store any processed audio. All conversion happens entirely in your browser using FFmpeg WASM.