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AMR to MP3 - Online Audio Converter
Convert AMR to MP3 online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
Convert AMR to MP3
Drop AMR audio here or click to select
AMR
MP3 (libmp3lame)
About AMR to MP3
AMR stores narrowband call speech, so MP3 makes the recording playable beyond carrier tools.
Why convert AMR to MP3?
- Smaller files with MP3 lossy compression.
- Keep quality where supported.
- Private, no upload - runs in your browser.
AMR vs MP3
| Codec | AMR-NB | libmp3lame |
|---|---|---|
| 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. | MP3 is the MPEG-1 Layer III codec, playable on virtually every device. |
When not to convert AMR to MP3
- Skip MP3 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 MP3 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. Repeated re-encoding stacks artifacts; convert from the master. Encode MP3 (libmp3lame) 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 MP3?
Drop your AMR file onto this page, choose quality and codec settings, then click Convert. The result downloads as MP3 instantly. All processing runs in your browser.
What codec is used for MP3?
The default codec for MP3 is libmp3lame. You can change audio parameters in Advanced mode.
Does AMR to MP3 improve quality?
No; narrowband detail stays narrowband, only playback gets easier.
Why is AMR to MP3 quiet?
Call recordings vary in gain; normalize after conversion.
How do you store my files?
We do not store any processed audio. All conversion happens entirely in your browser using FFmpeg WASM.