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MP3 to AMR - Online Audio Converter
Convert MP3 to AMR online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
Convert MP3 to AMR
Drop MP3 audio here or click to select
MP3
AMR (AMR-NB)
About MP3 to AMR
Convert MP3 to AMR. MP3 is the MPEG-1 Layer III codec, playable on virtually every device. 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 MP3 to AMR?
- Smaller files with AMR lossy compression.
- Keep quality where supported.
- Private, no upload - runs in your browser.
MP3 vs AMR
| Codec | libmp3lame | AMR-NB |
|---|---|---|
| Compression | lossy | lossy |
| Sample behavior | Quality set by bitrate | Quality set by bitrate |
| Typical use | MP3 is the MPEG-1 Layer III codec, playable on virtually every device. | AMR encodes narrowband speech for GSM calls at 12.2 kbps and below. |
When not to convert MP3 to AMR
- Skip AMR for archival masters: lossy compression discards detail, so keep the MP3 original.
- Keep a master copy: repeated exports stack small losses, so archive MP3 before batch AMR shares.
Limits
Starting point: MP3 - Lossy compressed music near 128-256 kbps. Repeated re-encoding stacks artifacts; convert from the master. Tuned for voice calls, so music loses detail by design. Encode AMR (AMR-NB) from MP3 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 MP3 to AMR?
Drop your MP3 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.