Upload your .wmv file and get a smaller, optimized MP4. Works with WMV files from any source. Free, no account required.
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Drag & drop your .wmv video file. We support files up to 500MB. No account needed.
SquishVideo converts and compresses your WMV to optimized MP4 H.264, reducing file size while preserving quality.
Get your compressed MP4 instantly. It's compatible with every platform, device, and browser.
WMV (Windows Media Video) is Microsoft's proprietary video format, widely used in the early 2000s for Windows-based video playback and streaming. WMV files are commonly found in older archives, PowerPoint presentations, and corporate video libraries. While superseded by MP4, many WMV files still exist and need to be converted.
WMV files tend to be medium compared to optimized MP4. Converting from WMV to MP4 H.264 typically reduces file size by 40-80% while maintaining excellent visual quality. The resulting MP4 also plays on every device and platform without compatibility issues.
WMV was developed by Microsoft in 1999. It uses the Advanced Systems Format (ASF) container and typically contains Windows Media Video encoded video. Browser support is ie/edge only (legacy), and mobile support is windows phone, limited elsewhere. For streaming, WMV offers yes (windows media) capabilities.
Keep WMV if you're doing professional editing and need the original codec quality. Convert to MP4 when: you need to share the video online, upload to social media, send via email, or reduce storage usage. For 99% of sharing and consumption purposes, MP4 is the better format.
| Feature | WMV | MP4 (H.264) |
|---|---|---|
| Container | Advanced Systems Format (ASF) | MPEG-4 Part 14 |
| Typical Codec | Windows Media Video | H.264 / H.265 |
| File Size | Medium | Optimized (smallest) |
| Browser Support | IE/Edge only (legacy) | Universal |
| Mobile Support | Windows Phone, limited elsewhere | Universal |
| Streaming | Yes (Windows Media) | Yes, natively |
When you upload a WMV file, SquishVideo first analyzes the video stream to understand its codec, resolution, framerate, and bitrate profile. We then transcode the video to H.264 MP4 using optimized encoding parameters. The entire process preserves audio quality (re-encoded to AAC) and maintains the original resolution unless a lower resolution would provide a better quality-to-size ratio.
WMV files typically come from: Windows Movie Maker, PowerPoint exports, corporate training videos, and legacy Windows applications.
SquishVideo supports 20+ video formats. Choose your input format:
Need your WMV video to fit a file size limit? Pick a target: