Convert OPUS to WMA

Tested on Windows 11, 24 October 2026

Convert OPUS audio to WMA in your browser or in the Filoshi app for Windows. WMA is lossy: Filoshi uses a high-quality setting, and you can choose the bitrate. Nothing is uploaded.

Get Filoshi · $29Many files at once, no size limit, on Windows.

How to convert OPUS to WMA in your browser

  1. 1
    Drop your OPUS file
    Drag it onto Filoshi above, or press Choose your OPUS file to pick it on your computer.
  2. 2
    Filoshi converts it
    WMA is chosen already. FFmpeg, compiled to WebAssembly, converts it inside this browser tab.
  3. 3
    Save your WMA file
    Download it when it is ready. Nothing was sent to a server.
Source format

What is OPUS?

Opus Audio (.opus). Opus is an open, royalty-free codec standardised by the IETF in 2012. It sounds very good at low bitrates for both speech and music, and it is the codec of WebRTC video calls and many voice-message apps.

Common use: Voice messages, calls, streaming, podcasts

Output format

What is WMA?

Windows Media Audio (.wma). WMA is Microsoft's Windows Media audio format from the Windows Media Player era. Windows plays it, but phones, Macs and many music apps do not, so WMA libraries are usually converted to MP3 or AAC.

Common use: Older Windows music libraries

Questions about OPUS to WMA

Is converting OPUS to WMA free?
Yes, one file at a time: the converter on this page runs in your browser, files up to 100 MB, no sign-up. The Filoshi desktop app ($29 once, for Windows) converts many files at once and has no size limit.
Does converting OPUS to WMA lose quality?
Yes, a little. WMA is a lossy format, so some detail is thrown away when the file is saved. Filoshi uses a high-quality setting by default, and you can choose the bitrate in the file viewer. OPUS is lossy too, so this is a second round of compression; convert from the original, not from earlier conversions.
Is my OPUS file uploaded anywhere?
No. The converter on this page runs in your browser with FFmpeg compiled to WebAssembly; your OPUS file is read and converted on your device and never sent to a server. The desktop app works the same way, offline.
Has OPUS to WMA been tested?
Yes. OPUS to WMA is one of the 1,841 conversions that passed Filoshi's automated test matrix on Windows 11.
Can I convert many OPUS files at once?
Yes, in the desktop app. Drop as many OPUS files as you like on the window, pick WMA once for all of them, and each file shows its own progress. The new files appear next to the originals, which are never changed.

Related conversions

Other OPUS conversions

OPUS to MP3OPUS to AACOPUS to OGGOPUS to FLACOPUS to M4AOPUS to AIFFOPUS to AC3OPUS to AU

Convert to WMA

MP3 to WMAWAV to WMAAAC to WMAOGG to WMAFLAC to WMAM4A to WMAAIFF to WMAALAC to WMA

Need OPUS to WMA for many files?

The browser converter handles one file at a time. The Filoshi app for Windows converts as many as you drop, runs offline, and has 1,841 tested conversions.

Get Filoshi · $29