All Tools
[ audio bench ]
GSM to AMR - Online Audio Converter
Convert GSM to AMR online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
Convert GSM to AMR
Drop GSM audio here or click to select
GSM
AMR (AMR-NB)
About GSM to AMR
Convert GSM to AMR. GSM 06.10 encodes European mobile speech at 13 kbps. AMR encodes narrowband speech for GSM calls at 12.2 kbps and below. Tuned for voice calls, so music loses detail by design..
Why convert GSM to AMR?
- Smaller files with AMR lossy compression.
- Keep quality where supported.
- Private, no upload - runs in your browser.
GSM vs AMR
| Codec | GSM | AMR-NB |
|---|---|---|
| Compression | lossy | lossy |
| Sample behavior | Quality set by bitrate | Quality set by bitrate |
| Typical use | GSM 06.10 encodes European mobile speech at 13 kbps. | AMR encodes narrowband speech for GSM calls at 12.2 kbps and below. |
When not to convert GSM to AMR
- Skip AMR for archival masters: lossy compression discards detail, so keep the GSM original.
- Keep a master copy: repeated exports stack small losses, so archive GSM before batch AMR shares.
Limits
Starting point: GSM - GSM 06.10 encodes European mobile speech at 13 kbps. Carrier framing can offset timing; verify duration. Tuned for voice calls, so music loses detail by design. Encode AMR (AMR-NB) from GSM 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 GSM to AMR?
Drop your GSM file onto this page, choose quality and codec settings, then click Convert. The result downloads as AMR instantly. All processing runs in your browser.
What codec is used for AMR?
The default codec for AMR is AMR-NB. 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.