Convert Adaptive Multi-Rate Audio (.amr) to Windows Media Audio (.wma) online for free. Fast, secure audio conversion with no watermarks or registration.
Conversion settings — add a file to adjust
Upload your .amr file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .wma file when it's ready.
WMA (Windows Media Audio) is Microsoft's proprietary audio codec, deeply integrated into the Windows ecosystem. While WMA has been largely superseded by AAC and Opus for general use, it remains relevant for Windows-specific environments — particularly Windows Media Player, older Windows Phone devices, and corporate systems built on Microsoft's media stack. Converting AMR to WMA makes voice recordings native to Windows playback infrastructure.
In Windows-centric environments where IT policies or legacy software mandate WMA format, conversion from AMR is necessary. Windows Media Player handles WMA with full metadata support, album art display, and media library integration. Some older Windows Phone and Zune devices only support WMA for downloaded audio. Corporate voicemail systems built on Microsoft Exchange may also prefer WMA attachments.
FFmpeg decodes the AMR audio and re-encodes it using the Windows Media Audio 2 codec (wmav2) at 64-128 kbps. The output is wrapped in an ASF (Advanced Systems Format) container with the .wma extension. The encoding settings are compatible with Windows Media Player 9 and later.
WMA at 64 kbps provides adequate quality for voice recordings. At this bit rate, WMA and AAC deliver comparable speech quality. WMA's Voice profile is optimized for spoken content, though the standard profile works well for AMR-sourced recordings too.
| Device | AMR | WMA |
|---|---|---|
| Windows PC | Partial | Native |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No |
Resolution: N/A
Bitrate: 320 kbps
OGG Vorbis preferred
Resolution: N/A
Bitrate: 256 kbps
AAC format required
Resolution: N/A
Bitrate: 128 kbps
Lossless FLAC/WAV for best quality
Resolution: N/A
Bitrate: 128 kbps
MP3 mono for spoken word
AMR to WMA conversion is appropriate for Windows-centric workflows and legacy Microsoft environments. For cross-platform use, M4A or MP3 is more practical.
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| No |
| Funktion | AMR | WMA |
|---|---|---|
| Fulde navn | Adaptive Multi-Rate Audio | Windows Media Audio |
| Filendelse | .amr | .wma |
| Bedst til | Speech optimized | Windows native |