WMV to WebM converter
Convert WMV to WebM free online. Upgrade Windows Media Video to VP9 for HTML5 streaming. No signup, 500 MB limit, files auto-deleted in 1 hour.
Drop a file to convert here
or click to browse
About WebM Video Format
Common Use Cases
- Converting Windows Media files for web publishing
- Modernizing WMV archives for browser playback
- Replacing proprietary WMV with open web video
WMV (Windows Media Video) was Microsoft answer to web video in the early 2000s, but it never gained cross-platform traction and requires Windows Media Player or specific codec packs on most systems. Converting to WebM moves your video to an open, universally supported format that plays natively in every modern browser.
WMV uses Microsoft proprietary codecs (VC-1, WMV3) that require Windows Media Player or specific codec packs. WebM uses the open VP9 codec and plays natively in all modern browsers without any plugin or proprietary software.
Why Convert WMV to WebM?
Cross-platform compatibility
WMV barely works outside Windows. WebM plays on Windows, macOS, Linux, Android, and every modern browser without special software.
Better compression than WMV
VP9 is a far more modern codec than WMV3 or VC-1. Expect significantly smaller files at the same visual quality.
No proprietary dependencies
WMV requires Microsoft technology. WebM is fully open and royalty-free, with no licensing concerns for any use.
HTML5 ready
Drop the WebM into a video tag and it streams in any browser. WMV cannot be embedded in modern web pages without a third-party player.
When to use each
Use WMV when...
- Locked into Windows-only workflows
- Using legacy Windows Media Player pipelines
- Corporate environments requiring WMV
- Playing on old Windows XP/7 machines
- Archiving in Microsoft ecosystems
Use WebM when...
- Publishing video on the web
- You need cross-platform playback
- Smaller files with better compression
- Open-source, royalty-free delivery
- Embedding video in modern web pages
Common use cases
- Converting Windows Media files for web publishing
- Modernizing WMV archives for browser playback
- Replacing proprietary WMV with open web video
How to use
- Upload your WMV file. Drag and drop your WMV onto the upload area, or click to browse. Uploads are limited to 500 MB per file.
- Start the conversion. Click Convert File and FFmpeg decodes the Windows Media video and re-encodes it as VP9 with Opus audio inside a WebM container.
- Download your WebM file. Download the WebM and use it on any website, web app, or modern platform. Files are automatically deleted within 1 hour.
Frequently asked questions
- Will this work with WMV files from old Windows PCs?
- Yes. FFmpeg handles all WMV codec variants including WMV7, WMV8, WMV9 (VC-1), and Windows Media Audio. The output is a modern VP9 WebM.
- Can Mac users play WebM?
- Yes. WebM plays in Safari (recent versions), Chrome, Firefox, and Edge on macOS. WMV has almost no Mac support without third-party software.
- Will the conversion improve video quality?
- No. The quality is bounded by the original WMV encoding. VP9 preserves the existing quality without adding further degradation, but cannot restore detail lost in the original compression.
- Is WMV to WebM conversion free?
- Yes. Anonymous visitors get a free daily cap, registered users get a higher limit, and Premium or Lifetime members get unlimited conversions.
- Is there a file size limit?
- Yes, 500 MB per upload.
- Should I convert to WebM or MP4 instead?
- WebM is ideal for web-only delivery with the smallest file sizes. If you also need playback on iPhones, iPads, or smart TVs, MP4 has broader device support.
- Will DRM-protected WMV files convert?
- No. DRM-protected WMV files cannot be decoded by FFmpeg. The converter works with unprotected WMV files only.