WMV to MP4
WMV is Microsoft's aging video format — still found in legacy Windows archives but increasingly unsupported on modern devices. Converting to MP4 future-proofs your videos with universal compatibility. FluidConvert converts WMV to MP4 free in your browser.
Drop your file here, or browse
Accepts: video/x-ms-wmv, .wmv · Max 100MB (free)
Your files are encrypted with TLS and automatically deleted after conversion.
Simply upload your .WMV file and we'll convert it to .MP4 format — fast, free, and secure.
Fast & Free
Convert files up to 100MB at no cost. No account needed.
Secure
Files are encrypted and automatically deleted after conversion.
High Quality
Industry-leading conversion with no quality loss.
How to Convert WMV to MP4
Upload Your File
Click the upload area above or drag and drop your .WMV file. We support files up to 100MB on the free plan.
Choose Output Format
Select .MP4 as your target format. Adjust any conversion settings if needed.
Download Your File
Click Convert Now and wait a few seconds. Once complete, download your converted file instantly.
About WMV to MP4
What is WMV?
WMV (Windows Media Video) was developed by Microsoft as part of the Windows Media framework. Once the default video format for Windows Movie Maker and many early web videos, WMV peaked in popularity during the Windows XP and Vista era. It uses Microsoft's VC-1 codec and ASF container. WMV files are increasingly incompatible with modern devices — iPhones, iPads, and many smart TVs can't play them natively.
Why convert to MP4?
MP4 with H.264 is the universal video standard supported by every modern device, platform, and browser. Convert WMV to MP4 to play old Windows videos on Apple devices, upload to YouTube or social media, share with anyone regardless of their operating system, or modernize a legacy video archive. MP4 also typically offers better quality at smaller file sizes than WMV.
What to expect from the conversion
WMV's VC-1 video is transcoded to H.264, and the audio from WMA to AAC. The process involves full re-encoding so there's a generation of quality change — at proper settings, the MP4 output can look as good or better than the WMV source due to H.264's superior compression. File sizes often decrease by 20-40%. Resolution and frame rate are preserved.
How FluidConvert handles it
We decode the WMV/VC-1 video stream and re-encode to H.264/AAC in MP4, producing universally compatible output that plays on any modern device.
Common reasons to convert WMV to MP4
- Migrating a legacy Windows video archive to modern MP4 for long-term storage
- Making old Windows Movie Maker projects playable on iPhones and iPads
- Uploading WMV corporate training videos to modern LMS platforms that require MP4
- Converting WMV screen recordings for sharing with Mac and Linux users
Frequently Asked Questions
Will old Windows Movie Maker WMV files convert properly?
Yes. WMV files from all eras of Windows — Movie Maker, Windows Media Encoder, and screen recorders — convert to MP4 without issues. Both standard WMV and WMV HD formats are supported.
Can I play the converted MP4 on my iPhone or Apple TV?
Yes. MP4 with H.264 video and AAC audio plays natively on every Apple device — iPhone, iPad, Mac, Apple TV — without any additional apps.
Will the MP4 be smaller than my WMV file?
Usually yes. H.264 (used in MP4) is more efficient than VC-1 (used in WMV), so the MP4 can maintain the same quality at 20-40% smaller file size, or improve quality at the same file size.