WMA to Opus Converter
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Supports: WMA
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Need help?How to Convert WMA to Opus
- Upload Your WMA File — Click "Choose Files" or drag and drop your WMA (Windows Media Audio) file. Only WMA files are accepted.
- Set Audio Quality — Under File Compression, the default for conversion is Quality Preset (Highest through Lowest). Other options include: File Size Percentage (1-100% slider), Specific File Size (MB/KB), Custom Bitrate (enter any value in kbps), Constant Bitrate (32-384 kbps presets), or Variable Bitrate (Opus ranges from 6k-24k up to 320k-510k).
- Adjust Audio Settings (Optional) — Set Audio Channel to Original, Mono, or Stereo. Change Audio Sample Rate (8000 Hz through 48000 Hz). Opus internally handles sample rates up to 48 kHz.
- Trim (Optional) — Under Trim, switch to "Trim" and set a Start Time and Duration in seconds or HH:MM:SS.sss format.
- Convert & Download — Click "Convert" and download your Opus file.
Why Convert WMA to Opus?
WMA (Windows Media Audio) is Microsoft's proprietary audio format, primarily supported on Windows devices. Opus is a modern, open-source codec developed by the IETF that delivers superior audio quality at lower bitrates than WMA, MP3, or AAC. Converting WMA to Opus is useful for reducing file size while maintaining or improving perceived audio quality, playing audio on non-Windows devices (Linux, Android, web browsers), using audio in VoIP, streaming, or gaming applications where Opus excels, and migrating away from proprietary formats to open standards.
WMA vs Opus Comparison
| Feature | WMA | Opus |
|---|---|---|
| Developer | Microsoft | IETF (open standard) |
| License | Proprietary | Royalty-free, open-source |
| Typical bitrate (music) | 128-192 kbps | 96-128 kbps (same quality) |
| Low-bitrate quality | Poor below 64 kbps | Excellent down to 6 kbps |
| Latency | Standard | Ultra-low (designed for VoIP) |
| Browser support | None | Chrome, Firefox, Edge, Safari |
| Platform support | Windows only | Universal |
| Best for | Legacy Windows playback | Streaming, VoIP, modern apps |
Opus Bitrate Guide
| Bitrate | Quality | Best For |
|---|---|---|
| 32 kbps | Acceptable | Voice calls, talk radio |
| 64 kbps | Good | Podcasts, audiobooks |
| 96 kbps | High | Music (casual listening) |
| 128 kbps | Very High | Music (quality-focused) |
| 192-256 kbps | Transparent | Critical listening, archival |
What bitrate should I use for music?
Opus at 96-128 kbps delivers quality comparable to MP3 at 192-256 kbps. For most listeners, 128 kbps Opus is indistinguishable from the original. Use the Constant Bitrate preset (128 kbps) or Variable Bitrate for the best quality-to-size ratio. For voice content, 32-64 kbps is sufficient.
Will converting WMA to Opus lose quality?
Both WMA and Opus are lossy codecs, so re-encoding introduces some generational loss. To minimize this, use the "Highest" Quality Preset or a higher Constant Bitrate (192+ kbps). Opus generally produces better quality per bit than WMA, so even at a lower bitrate the output may sound comparable.
Does Opus work on iPhones?
iOS does not natively support Opus playback in the Music app, but Safari and most third-party players (VLC, Infuse) support it. For maximum iPhone compatibility, consider converting to AAC instead. Opus is fully supported on Android, Windows, macOS, Linux, and all modern web browsers.
Can I trim the audio during conversion?
Yes. Under Trim, switch from "Unchanged" to "Trim" and enter a Start Time and Duration. Times can be entered in seconds or HH:MM:SS.sss format. This lets you extract a specific segment without needing separate editing software.
What is Variable Bitrate for Opus?
Variable Bitrate (VBR) lets Opus use more bits for complex audio passages and fewer bits for silence or simple sections. For Opus, VBR ranges from 6k-24k (low) up to 320k-510k (maximum). VBR typically produces better quality than Constant Bitrate at the same average file size.