WMV to MKV - Online Video Converter
Convert WMV to MKV online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
About WMV to MKV
Convert WMV to MKV. WMV pairs Microsoft's WMV video with WMA audio in an ASF wrapper. MKV is an open container holding multiple video, audio, and subtitle tracks. Only the selected tracks carry over, so pick audio and subtitles first..
Why convert WMV to MKV?
- Smaller files with MKV lossy compression.
- Keep animation and transparency where supported.
- Private, no upload - runs in your browser.
WMV vs MKV
| Animation | Yes | Yes |
|---|---|---|
| Transparency | No | Yes |
| Compression | lossy | lossy |
| Typical use | WMV pairs Microsoft's WMV video with WMA audio in an ASF wrapper. | MKV is an open container holding multiple video, audio, and subtitle tracks. |
When not to convert WMV to MKV
- Skip MKV for archival masters: lossy compression discards detail, so keep the WMV original.
- Keep a master copy: repeated exports stack small losses, so archive WMV before batch MKV shares.
Limits
Starting point: WMV - WMV pairs Microsoft's WMV video with WMA audio in an ASF wrapper. Protected store files cannot be converted; use DRM-free sources. Only the selected tracks carry over, so pick audio and subtitles first. Encode MKV (H.264 / AAC) from WMV at a bitrate near the source, and confirm the audio track before converting.
How conversion works
Conversion runs entirely in your browser with FFmpeg WASM. Files never leave your device.