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WebM to AMR - Online Audio Converter
Convert WebM to AMR online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
Convert WebM to AMR
Drop WebM audio here or click to select
WebM
AMR (AMR-NB)
About WebM to AMR
Convert WebM to AMR. WebM pairs VP9 video with Opus audio and supports an alpha channel. 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 WebM to AMR?
- Smaller files with AMR lossy compression.
- Keep quality where supported.
- Private, no upload - runs in your browser.
WebM vs AMR
| Animation | Yes | No |
|---|---|---|
| Transparency | Yes | No |
| Compression | lossy | lossy |
| Typical use | WebM pairs VP9 video with Opus audio and supports an alpha channel. | AMR encodes narrowband speech for GSM calls at 12.2 kbps and below. |
When not to convert WebM to AMR
- Skip AMR for archival masters: lossy compression discards detail, so keep the WebM original.
- Flatten transparency first: AMR has no alpha channel, so composite WebM over a background color.
Limits
Starting point: WebM - VP9 video with Opus audio and alpha support. Apple editors accept it unevenly; keep MP4 for editing round-trips. Tuned for voice calls, so music loses detail by design. Encode AMR (AMR) from WebM at a bitrate near the source, and confirm the audio track before converting.
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 WebM to AMR?
Drop your WebM 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.