CONVERT OPUS → WMA (OPUS to WMA)
Fast, secure OPUS to WMA conversion. No registration required.
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HOW TO CONVERT OPUS → WMA
Upload the OPUS
Drop or select your OPUS file. The upload is encrypted and the file is queued for conversion.
Transcode via FFmpeg
FFmpeg decodes the OPUS stream to PCM internally, then re-encodes as WMA at the bitrate you select.
Download the WMA
The WMA is delivered as a direct download; metadata and cover art transfer automatically where possible.
Here is the short version — Opus is the modern low-latency royalty-free codec used in VoIP, streaming, and WebRTC. Hence the need for WMA. Need a WMA version of a OPUS recording for a podcast host, audio book platform or DAW that refuses the original container? Drop the file above and our encoder produces a clean WMA you can drag straight into the destination tool. Metadata such as title, artist and cover art travels with the audio. Keep in mind Opus is the modern low-latency royalty-free codec used in VoIP, streaming, and WebRTC. And remember that WMA is Microsoft's proprietary audio codec, historically tied to Windows Media Player.
Why convert OPUS to WMA
Opus Audio is great in its own niche, but Windows Media Audio is either more universally playable or better suited to the device you are targeting. Converting lets you ship the audio without asking listeners to install a codec. The loss in quality between the two is negligible at sensible bitrates.
OPUS vs WMA — Technical specifications
Side-by-side comparison of the technical details.
OPUS
- MIME type
- audio/opus
- Extensions
- .opus, .ogg (container)
- Standard
- RFC 6716 (2012)
- Sample rates
- 8, 12, 16, 24, 48 kHz
- Latency
- 5-60 ms (configurable)
- MIME Type
- audio/opus
- Extension
- .opus
- Category
- Audio Files
- Full Name
- Opus Audio
- Conversion Engine
- FFMPEG
WMA
- MIME type
- audio/x-ms-wma
- MIME Type
- audio/x-ms-wma
- Extension
- .wma
- Category
- Audio Files
- Full Name
- Windows Media Audio
- Conversion Engine
- FFMPEG
- Container
- ASF (Advanced Systems Format)
- Variants
- WMA Standard, WMA Pro, WMA Lossless, WMA Voice
- Max bitrate
- 768 kbps (WMA Pro)
| Specification | OPUS | WMA |
|---|---|---|
| MIME type | audio/opus | audio/x-ms-wma |
| Extensions | .opus, .ogg (container) | — |
| Standard | RFC 6716 (2012) | — |
| Sample rates | 8, 12, 16, 24, 48 kHz | — |
| Latency | 5-60 ms (configurable) | — |
| MIME Type | audio/opus | audio/x-ms-wma |
| Extension | .opus | .wma |
| Category | Audio Files | Audio Files |
| Full Name | Opus Audio | Windows Media Audio |
| Conversion Engine | FFMPEG | FFMPEG |
| Container | — | ASF (Advanced Systems Format) |
| Variants | — | WMA Standard, WMA Pro, WMA Lossless, WMA Voice |
| Max bitrate | — | 768 kbps (WMA Pro) |
OPUS vs WMA — Strengths and limitations
What each format does best, and where it falls short.
OPUS Strengths
- Best-in-class quality across the entire bitrate range.
- Royalty-free and patent-free.
- Ultra-low latency — suitable for live voice and music.
- Handles speech and music equally well — no need to switch codecs.
- Mandatory codec in WebRTC, so supported in every browser by design.
Limitations
- Very low hardware decoder adoption — software-only on most phones.
- Older platforms (legacy Windows apps, old cars) may not play .opus files.
- Container semantics confusing — Opus lives inside Ogg, WebM, or MP4.
WMA Strengths
- Good quality at low bitrates (32-64 kbps) — outperformed MP3 in that range.
- Native playback on every Windows version 2000 through 10.
- Lossless variant available (WMA Lossless) for archiving.
- Supports multichannel 5.1 surround audio.
Limitations
- Proprietary — poor support outside Windows and Windows Media Player.
- DRM variants made files brittle — many purchased tracks became unplayable when stores shut down.
- Ecosystem abandoned — no modern editors, hardware decoders, or streaming services use WMA.
Quality & Compatibility
Lossy-to-lossy transcoding (most cross-format audio jobs) loses a tiny amount of quality on each pass — usually inaudible at our default VBR ~190 kbps for music or 96 kbps for speech. Lossy-to-lossless conversions freeze the existing quality but cannot improve it; lossless-to-lossy is only as good as the target bitrate you choose.
Tips for Best Results
- Pick 128 kbps for podcasts and voice, 192–256 kbps for music, 320 kbps only if the audio will be edited further downstream.
- Keep the OPUS master alongside the WMA — re-encoding a lossy format twice accumulates audible artefacts.
- For mono voice content, convert to mono WMA explicitly to halve file size without any quality loss.
Frequently Asked Questions
Lossy-to-lossy conversions (most combinations) re-compress the audio, which technically introduces some loss. At a 192 kbps or higher target it is inaudible on normal equipment. Lossy-to-lossless conversions freeze the existing quality but cannot improve it; lossless-to-lossy transcodes are only as good as the target bitrate you choose.
For voice content (podcasts, audiobooks, lectures) 128 kbps is indistinguishable from higher bitrates. For music, 192-256 kbps covers most listening; 320 kbps is the ceiling for WMA and the right choice for audio you plan to edit further. Above that, prefer a lossless target instead.
Yes. Title, artist, album, year and cover art travel from the OPUS container to the WMA container automatically where both formats support them. If a tag field has no WMA equivalent, it is dropped silently. Use any tag editor (Mp3tag, MusicBrainz Picard) to fine-tune afterwards.
Opus Audio
Source formatOpus is a versatile, open-source audio codec optimized for both speech and music at very low bitrates. It is the standard for WebRTC voice calls and excels at real-time communication.
Windows Media Audio
Target formatWMA is a proprietary Microsoft audio format from the Windows Media framework. Once common in the Windows ecosystem, it has been largely replaced by AAC and MP3 for general use.
Going the other way? Convert WMA back to OPUS with the same engine.
Common Use Cases
Share across platforms
Send WMA files to anyone without worrying about whether they have the right software for OPUS.
Embed in documents
Drop WMA output into Word, Google Docs, PowerPoint, Notion or a website without conversion warnings.
Optimize size
WMA often produces smaller files than OPUS for web, email and storage.
Archive & future-proof
Store in a widely-supported format that will still open on future operating systems without legacy plugins.
OPUS vs WMA — Typical file sizes
Approximate file sizes for common scenarios.
- Voice call (24 kbps) 180 KB/min
- Podcast (48 kbps) 21 MB/hour
- Music (128 kbps) ~1 MB/min
- 3-min song (128 kbps) 3 MB
- 3-min song (Lossless) 25-35 MB
- 1-hour talk (64 kbps) 28 MB
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Related comparisons
See these formats side by side to understand which fits your use case best.
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