How to Convert WMA to OPUS — Quick & Free
Fast, instant WMA to OPUS conversion. No signup required. Just drop your .wma file and get .opus in seconds.
Batch Settings
Generation loss — quality may degrade
WMA uses lossy compression, and so does OPUS. Converting means decoding and re-encoding — each cycle can permanently degrade quality. Convert from the original source file whenever possible.
Some metadata may not survive
Your WMA file may contain ASF metadata, DRM tags metadata. OPUS has limited or no support for these metadata types. Location data (GPS), camera settings, and color profiles may be stripped during conversion.
What compression artifacts to expect
OPUS lossy compression can produce minimal artifacts even at low bitrates. At the high quality settings CocoConvert uses by default, these are usually invisible to the eye. Lower quality settings trade visual fidelity for smaller file sizes.
About WMA to OPUS Conversion
Short answer: yes, you can convert WMA to OPUS online for free, and some quality differences may occur depending on the format types. Just upload your .wma file to CocoConvert, pick OPUS as the output, and click Convert. The whole process takes seconds.
Now for the details. WMA (Windows Media Audio) is Microsoft's audio codec — less common today but still found in legacy collections. Opus is a versatile open codec excelling at both speech and music, used in WebRTC and Discord. Converting between these two formats lets you upgrade to a modern format.
Full Name: WMA uses Windows Media Audio, while OPUS uses Opus Audio. Compression: WMA uses Lossy, while OPUS uses Lossy. Typical File Size: WMA uses 1 MB per minute at 128 kbps, while OPUS uses 0.5–1 MB per minute at 96 kbps (near-transparent quality).
Your WMA file is decoded and re-encoded as OPUS. WMA uses lossy compression, and so does OPUS. Converting means decoding and re-encoding — each cycle can permanently degrade quality. Convert from the original source file whenever possible.
Common misconception: ""I'll convert to OPUS and then back to WMA — it'll be the same"" — in reality, each lossy conversion cycle permanently degrades quality. going wma → opus → wma will produce a noticeably worse file than the original. always keep your source file.
CocoConvert runs entirely online — no software to install, no account to create. Your files are encrypted during upload (TLS), processed on isolated servers in Germany, and permanently deleted after 24 hours. It works in Chrome, Safari, Firefox, Edge, and all mobile browsers.
Need to convert more than one file? Free users can do 5 per hour. Pro gets 100 per hour with files up to 5 GB each.
How to Convert WMA to OPUS
- 1
1. Upload WMA
Drop your .wma file onto the page (or tap "Browse" on mobile). Add multiple files for batch conversion.
- 2
2. Select OPUS
Choose .opus from the output dropdown. Settings are pre-configured for best results.
- 3
3. Convert
One click. The server handles all the heavy lifting using FFmpeg and Sharp.
- 4
4. Download
Your .opus file is ready. Download it directly or get all files as a zip archive.
What Happens When You Convert WMA to OPUS
Your WMA audio is decoded into raw PCM samples, then re-encoded as OPUS. Some audio data is permanently discarded during compression.
Your WMA file is decoded — compressed audio becomes raw PCM waveform data
The raw audio is re-encoded using Opus Audio's lossy codec
Metadata (tags, artwork, track info) is transferred where OPUS supports it
The OPUS file is saved and ready for download
WMA vs OPUS — Detailed Comparison
| Feature | .WMA | .OPUS |
|---|---|---|
| Full Name | Windows Media Audio | Opus Audio |
| Compression | Lossy | Lossy |
| Typical File Size | 1 MB per minute at 128 kbps | 0.5–1 MB per minute at 96 kbps (near-transparent quality) |
| Platform Support | Limited | Limited |
| Browser Support | none | modern browsers |
| Year Created | 1999 | 2012 |
| Open Standard | No | Yes |
Should You Convert WMA to OPUS?
When to Convert
- ✓You need a file that works in web browsers
When NOT to Convert
- ✗You're converting just because the file "seems old" — re-encoding lossy-to-lossy always degrades quality
Common Mistakes When Converting WMA to OPUS
"I'll convert to OPUS and then back to WMA — it'll be the same"
Each lossy conversion cycle permanently degrades quality. Going WMA → OPUS → WMA will produce a noticeably worse file than the original. Always keep your source file.
Frequently Asked Questions
Is WMA to OPUS conversion free?
Yes. CocoConvert offers free WMA to OPUS conversion with generous daily limits — 25 minutes of processing time and up to 5 files per hour (250 MB each). Pro plans remove these limits.
How fast is WMA to OPUS conversion?
Most files convert in 2–10 seconds depending on size. Large audio files may take 30 seconds. Batch jobs process in parallel for maximum speed.
What happens to my files after conversion?
Your uploaded WMA file and the converted OPUS file are both automatically deleted from our servers within 24 hours. They are never shared, sold, or analysed.
Does converting WMA to OPUS lose quality?
WMA uses lossy compression, and so does OPUS. Converting means decoding and re-encoding — each cycle can permanently degrade quality. Convert from the original source file whenever possible.
Can I convert OPUS back to WMA?
Yes, CocoConvert supports OPUS to WMA conversion as well. However, if the original conversion involved lossy compression, converting back won't recover the lost data.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.