Opus to WMA Converter
Convert Opus to WMA free — no upload, no signup
To convert Opus to WMA, drop your Opus audio files into the box below and click Convert. Fylo converts with ffmpeg running inside your browser, so nothing is uploaded and there's no signup or watermark. Make Opus audio play in Windows Media Player.
Drop audio files here
or tap to browse · paste with Ctrl+V · add many at once
Your files never leave your device
Advanced
How to convert Opus to WMA
Add your Opus files
Drag and drop Opus files into the box or tap to choose them. The converter engine (about 31 MB) downloads once, the first time you convert.
Pick a bitrate
192 kbps suits music and 128 kbps or less suits speech. Sample rate and mono/stereo are under Advanced.
Convert and download
Click Convert, then download each WMA file or all of them as one ZIP.
Why convert Opus to WMA?
Older Windows software can't decode Opus.
What happens when you convert Opus to WMA?
The audio is re-encoded to WMA2 at 192 kbps.
How does Fylo convert Opus to WMA?
Fylo decodes the Opus audio in the Opus with ffmpeg compiled to WebAssembly and encodes it with Windows Media Audio 2 (wmav2) at 192 kbps in an ASF container. Both formats are lossy, so each conversion discards a little detail — start from the highest-bitrate Opus you have. A 3-minute song is ≈ 2.9 MB at 128 kbps as Opus and ≈ 3.6 MB at 160 kbps as WMA. The original sample rate and channel layout are kept unless you change them under Advanced.
What's the difference between Opus and WMA?
Opus is an open, royalty-free codec standardised by the IETF as RFC 6716 in 2012. It blends speech technology from Skype's SILK with music coding from Xiph's CELT, so it handles both voice and music well. Files are usually stored in the Ogg container with the .opus extension.
WMA (Windows Media Audio) was released by Microsoft in 1999 to compete with MP3 and is stored in the ASF container. Windows Media Player ripped CDs to WMA by default for years, so many older music collections are WMA.
Learn more: Opus format guide · WMA format guide
| Property | Opus | WMA |
|---|---|---|
| Compression | Lossy | Lossy (also Pro/Lossless variants) |
| Typical bitrate | 24–160 kbps | 64–192 kbps |
| 3-minute song | ≈ 2.9 MB at 128 kbps | ≈ 3.6 MB at 160 kbps |
| Tags and cover art | Yes (Vorbis comments) | Yes |
| Compatibility | Browsers, Android, WhatsApp, Discord; partial on Apple | Windows; poor on Mac, iPhone and browsers |
| Best for | Voice notes, podcasts, streaming at low bitrates | Old Windows Media Player libraries |
| Introduced | 2012 | 1999 |
Frequently asked questions
Does VLC play Opus?
Yes — WMA is only needed for old Windows tools.
Is it larger?
Yes, usually.
Is my Opus file uploaded to a server?
No. Fylo runs ffmpeg, the same engine used by professional video tools, compiled to WebAssembly inside your browser. Your Opus file is read directly from your device and never sent anywhere.
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