WMV to MP4 Converter

About this converter

WMV (Windows Media Video) is Microsoft's older video format, built around the WMV3/VC-1 codecs. It plays fine in Windows Media Player but tends to fail on Macs, iPhones, Android devices, and inside web pages - which makes WMV files awkward to share.

Converting WMV to MP4 re-encodes the video to H.264, the universally supported codec. The result plays on practically any device and uploads cleanly to social media, messaging apps, and video platforms.

Because WMV's codecs are not MP4-compatible, this is a full re-encode. Pick a higher quality setting if you want to stay close to the original.

WMV to MP4: good to know

• Always a re-encode, since VC-1/WMV3 cannot be repackaged into MP4.
• The MP4 result is widely compatible and usually a similar size or smaller than the WMV.
• Use High quality if the clip will be edited later; Medium is fine for sharing.

How it works

1. Drop your file(s) in the box above (or click to browse).
2. Make sure MP4 is selected as the output.
3. Click Convert, then Download your file.

Frequently asked questions

How do I convert WMV to MP4?

Drop your WMV file above, confirm MP4 is the output, optionally set quality under Options, then click Convert and Download.

Why won't my WMV play on my Mac or iPhone?

WMV uses Microsoft's VC-1/WMV3 codecs, which Apple devices do not support out of the box. Converting to an H.264 MP4 makes the video play natively.

Does converting WMV to MP4 reduce quality?

It is a re-encode, so there is some loss in theory, but at the High setting it is hard to notice. Lower settings shrink the file at the cost of detail.

Can I upload the converted MP4 to social media?

Yes. MP4 (H.264) is the format virtually every platform recommends, so the converted file uploads and plays reliably.

Are my files uploaded anywhere?

No. The conversion runs entirely in your browser with WebAssembly - your WMV never leaves your computer.

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