Convert WMA to Opus
Convert any audio file to Opus format online for free. Fast, secure, and easy-to-use audio to Opus converter with no software installation required.
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Max file size: 50 MBMax duration: 30 min
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Why Choose Scriptivox WMA to Opus Converter?
Fast Conversion
Our powerful servers process your files quickly, delivering converted files in seconds.
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Your files are encrypted and automatically deleted after conversion. We never store or share your data.
No Installation
Works directly in your web browser. No software download or installation required.
How to Use WMA → Opus
Upload File
Drag and drop your WMA file or click to browse. Supports files up to 1GB.
Convert
Select Opus as your output format and click convert. Our servers will process your file instantly.
Download
Download your converted file instantly. The download link expires in 1 hour for security.
WMA vs Opus: format comparison
How the two formats differ on the things that change your result.
| Specification | WMA (source) | Opus (result) |
|---|---|---|
| Container | ASF | Ogg |
| Developed by | Microsoft | Xiph.Org / IETF |
| Introduced | 1999 | 2012 |
| Audio codecs | WMA, WMA Pro | Opus |
| Compression | Lossy | Lossy |
| Typical bitrate | 64–192 kbps | 64–256 kbps |
| Max sample rate | 48 kHz | 48 kHz |
| Max channels | 8 | 255 |
| Gapless playback | No | Yes |
| Metadata / tags | ASF / WM tags | Vorbis comments |
| Approx. file size | 0.48–1.44 MB per minute | 0.48–1.44 MB per minute |
| Licensing | Proprietary | Royalty-free |
| Plays natively on | Native: Windows · Needs a player: macOS, iOS, Android | Native: Web browsers, Android · Needs a player: Windows, macOS, iOS |
| Best for | Windows media libraries, legacy archives | voice and calls, podcasts, web delivery |
What changes when you convert WMA to Opus
Both WMA and Opus are lossy, so this conversion decodes WMA and re-encodes it as Opus. That second encode adds its own loss on top of the first. Choosing a higher bitrate, up to 256 kbps, keeps the damage small enough to be inaudible in most material.
Compatibility is the main win here: Opus plays natively on 2 more of the platforms we track than WMA does, so the result works without asking anyone to install a player.
The two formats are aimed at different jobs. WMA is typically used for Windows media libraries, legacy archives, while Opus is the usual pick for voice and calls, podcasts, web delivery. That difference in intent is what most of the specification gaps above come from.
Expect metadata to be rewritten rather than copied: ASF / WM tags in the source becomes Vorbis comments in the result. Standard fields map cleanly; niche custom tags often do not.
Moving to Opus moves you onto an open, royalty-free format, which matters if the files need to outlive any single vendor.
About WMA to Opus Conversion
This page converts WMA files, stored in the ASF container since 1999, into Opus, which uses Ogg and dates from 2012. The differences between the two containers decide what changes in the result.
WMA comes from Microsoft and dates to 1999. It carries WMA, WMA Pro, which is what determines the quality ceiling of anything you convert out of it.
Opus was introduced by Xiph.Org / IETF in 2012. It carries Opus and has native playback on 2 of six platform categories, which is the practical reason to choose it as a target.
After converting your file, you can use Scriptivox transcription services to convert your audio to text. Perfect for meetings, interviews, podcasts, and more.
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