Convert MP4 to WMV Online Free
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Convert your MP4 video to WMV format for Windows Media Player compatibility and legacy Windows workflows. Server-side FFmpeg processing ensures high-quality results with no software to install.
By ChangeThisFile Team · Last updated: March 2026
ChangeThisFile converts MP4 to WMV using FFmpeg, a professional-grade multimedia framework, to transcode MP4 files to WMV format with optimized codec settings and quality preservation. Free with no signup required. Files are encrypted during transfer and automatically deleted from our servers after conversion.
MP4 vs WMV: Format Comparison
Key differences between the two formats
| Feature | MP4 | WMV |
|---|---|---|
| Full Name | MPEG-4 Part 14 | Windows Media Video |
| Developer | ISO/IEC | Microsoft |
| Container | MP4 | ASF (Advanced Systems Format) |
| Video Codec | H.264, H.265, VP9 | WMV9, VC-1 |
| Audio Codec | AAC, MP3, AC-3 | WMA, WMA Pro |
| Platform Support | Universal (all devices) | Primarily Windows |
| Compression | Excellent | Good |
| Streaming | HTTP Live Streaming | Windows Media Services |
When to Convert
Common scenarios where this conversion is useful
Windows Media Player Playback
Play videos on older Windows machines that have Windows Media Player as the default player but limited MP4 codec support.
Corporate Windows Environments
Share video files in enterprise settings where Windows-based systems and legacy media players are the standard.
Legacy Software Compatibility
Export video content for older video editing or presentation software that accepts WMV but not modern MP4 containers.
Windows DVD Maker Projects
Prepare video files for burning to DVD using Windows DVD Maker, which works best with WMV source files.
Email Attachments for Windows Users
Convert videos to WMV for recipients on Windows systems where WMV files open reliably without additional codec installation.
Who Uses This Conversion
Tailored guidance for different workflows
Content Creators
- Convert MP4 footage to WMV for playback in software and devices that expect the WMV format
- Transform MP4 recordings to WMV to match the format an existing workflow or player requires
Video Editors
- Convert MP4 footage to WMV for importing into editing software like Premiere or DaVinci Resolve
- Transform MP4 project exports to WMV for client delivery or final distribution
Social Media Managers
- Convert MP4 videos to WMV for compatibility with legacy players or archival systems that use WMV
- Transform MP4 source files to WMV when a specific tool only accepts WMV input
How to Convert MP4 to WMV
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1
Upload Your MP4 File
Click the upload area or drag and drop your MP4 video file. Files up to 25MB (free tier; 100MB with eligible paid browser access) are supported and transferred over an encrypted connection.
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2
Convert with FFmpeg
Our servers process your file using FFmpeg, transcoding the video to WMV format with VC-1 encoding and WMA audio for full Windows compatibility.
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3
Download Your WMV
Once conversion completes, your WMV file downloads automatically. The source file is deleted from our servers immediately after.
Developers: convert via API →
Frequently Asked Questions
WMV is Microsoft's native video format and plays natively on Windows without additional codecs. It's useful for legacy Windows environments, older software compatibility, and Windows-specific workflows like Windows DVD Maker.
Some quality loss is expected since both formats use lossy compression, and transcoding always involves re-encoding. ChangeThisFile uses FFmpeg's high-quality settings to minimize quality degradation.
The API endpoint accepts files up to 25MB (free tier; 100MB with eligible paid browser access). For larger files, you may need to compress the video first or use a desktop tool like HandBrake.
Conversion time depends on file size and video length. Most files under 50MB convert within 30-90 seconds on our FFmpeg servers.
Yes. Your file is uploaded over an encrypted HTTPS connection, processed on our secure servers, and automatically deleted immediately after your download is complete.
Yes, WMV (using VC-1 encoding) supports HD resolutions up to 1080p and beyond. The output resolution matches your source MP4.
WMV playback on Mac and Linux requires third-party players like VLC or codec packs. For cross-platform use, MP4 is the better choice.
The converted WMV file uses Windows Media Audio (WMA) encoding, which is the standard audio codec for WMV containers and plays natively in Windows Media Player.
No account or signup is needed. ChangeThisFile is completely free to use without registration.
Currently the tool converts one file at a time. For batch conversions, you can convert files sequentially using the same converter.
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Need to convert programmatically?
Use the ChangeThisFile API to convert MP4 to WMV in your app or script. Free tier included.
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