Convert WMV to MP4
100% private — runs on your device, never uploaded. Works offline once loaded.
WMV is Microsoft's old Windows Media format, and outside Windows it is close to unplayable: Macs need extra software, phones generally refuse it, and editors and upload forms treat it as a legacy curiosity. It turns up in archives of old presentations, screen recordings and camcorder transfers. Converting rebuilds the video as H.264 and the audio as AAC inside an MP4, which is the closest thing video has to a universal format. Because Windows Media video is an old codec, the MP4 often ends up no larger despite looking the same, and it gains the fast-start flag that lets it stream rather than download in full first.
Frequently asked questions
Why will my WMV not play on a Mac or phone?
Windows Media is a Microsoft format that other platforms never adopted. Converting to MP4 removes the problem entirely.
Does this handle DRM-protected WMV?
No. Files with Windows Media DRM cannot be decoded by anything but the licensed player, and that restriction is deliberate.
Is my file uploaded?
No — everything happens in your browser.
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