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