WMV to MP4 converter
Turn Windows Media videos into MP4s that play on any device.
or drop them here, or paste them
Nothing is uploaded.
This converter loads its engine (31 MB) from jsDelivr the first time. jsDelivr sees your internet address, never your file.
About WMV to MP4
WMV is Windows Media Video, the format of Windows Movie Maker, older Windows screen recorders and many videos from the 2000s and early 2010s. Macs, iPhones, Android phones and most websites can't play it. MP4 with H.264 video and AAC sound plays on all of them.
This converter runs FFmpeg, the open-source video tool, inside your browser. The first time you convert, your browser downloads FFmpeg's core, about 31 MB, from jsDelivr, a public code library. After that it works offline. Your video itself is never sent anywhere.
FFmpeg runs on one processor core in the browser, so expect roughly real-time speed on a recent computer: a five-minute video takes a few minutes, longer on a phone. The bar shows how far it is and about how long is left.
The MP4 keeps the picture size and frame rate of the WMV. Copy-protected videos, such as some bought or rented in the past, can't be converted by any tool like this. Very large files may run out of browser memory; a desktop program suits those better.
Questions and answers
Yes. H.264 video with AAC sound in an MP4 plays in Photos, QuickTime and Safari.
No. Videos with copy protection (DRM) can't be decoded by FFmpeg, so the page tells you it couldn't read the file.
Your browser first downloads FFmpeg's core, about 31 MB. It is kept for next time, so later conversions start straight away.