Convert WebM Video (.webm) to Windows Media Audio (.wma) online for free. Fast, secure video conversion with no watermarks or registration.
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Upload your .webm 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.
WebM contains Opus or Vorbis audio — open-source codecs. WMA (Windows Media Audio) is Microsoft's proprietary audio format from 1999, standard in the Windows ecosystem. Converting WebM audio to WMA targets legacy Windows devices, media servers, and applications that require Microsoft's audio format.
Legacy Windows Media Center installations, Zune players, older car stereos, and enterprise media servers may require WMA. Converting WebM audio to WMA bridges the gap between web-standard open-source audio and the legacy Microsoft ecosystem.
This conversion is increasingly rare as WMA has been largely replaced by AAC and MP3 even within the Windows ecosystem.
FFmpeg extracts and decodes Opus/Vorbis from the WebM container, then encodes to WMA using the wmav2 encoder. Output bitrates range from 64-320 kbps. The ASF container with .wma extension wraps the audio. WMA Pro encoding is available for higher efficiency.
WMA v2 at 192 kbps is comparable to Vorbis at similar bitrates. The Opus/Vorbis-to-WMA transcoding introduces a generation loss; using 20-30% higher WMA bitrate compensates. WMA Pro at 128 kbps approaches AAC quality.
| Device | WebM | WMA |
|---|---|---|
| Windows PC | Partial | Native |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Native | Partial |
| Linux | Partial | Partial |
| Web Browser | Native |
Resolution: 1920x1080
Bitrate: 8-12 Mbps
H.264 recommended for fast processing
Resolution: 1080x1080
Bitrate: 3.5 Mbps
Square or 9:16 for Reels
Resolution: 1080x1920
Bitrate: 4 Mbps
9:16 vertical, under 60s ideal
Resolution: 1280x720
Bitrate: 5 Mbps
Under 140s, 512MB max
Resolution: 960x540
Bitrate: 2 Mbps
16MB limit for standard, 64MB for document
Resolution: 1280x720
Bitrate: 4 Mbps
WebM to WMA serves legacy Windows ecosystem needs, extracting audio from web sources into Microsoft's native format.
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| Funktion | WebM | WMA |
|---|---|---|
| Fulde navn | WebM Video | Windows Media Audio |
| Filendelse | .webm | .wma |
| Bedst til | Web optimized | Windows native |