Upload a WMV file and download a MP4. Free, no account, no watermark, and nothing is kept on our server.
Drag and drop a video file here
or
3GP · AVI · FLV · M4V · MKV · MOV · MP4 · MPEG · MPG · MTS · OGV · TS · WEBM · WMV · Maks 2 GB
Escaping a Windows-only format so the file plays on anything.
Windows Media Video was Microsoft answer to streaming in the early 2000s. On anything that is not Windows it tends to fail silently, which is why nearly everyone converting a WMV is simply trying to make it play.
MP4 is the format the world settled on. It is a container rather than a codec, almost always holding H.264 video and AAC audio, and there is no device, browser, editor or social platform that refuses it. If you are not sure what to convert something to, the answer is MP4.
| WMV | MP4 | |
|---|---|---|
| Released | 1999 | 2003 |
| Developed by | Microsoft | MPEG |
| Type | Container and codec | Container |
| Usual codecs | Windows Media Video | H.264 or H.265 with AAC |
| File size | Moderate | Small for the quality |
| Best suited to | Legacy Windows workflows | Everything, honestly |
| Support | Poor outside Windows | Universal |
The video is decoded and re-encoded, which costs a small amount of quality - invisible once, noticeable if you convert the same clip back and forth repeatedly. Resolution, frame rate and aspect ratio are preserved. Going from WMV to MP4 changes the wrapper and the codec, not the footage itself.
Video takes real time. A short clip finishes in under a minute, while a full-length film can take considerably longer, because every frame has to be decoded and encoded again. Uploading a large file is usually the slowest part of all.
Your file is uploaded to our server because the conversion runs there. A cleanup task runs every hour and deletes anything older than an hour, so nothing you upload survives more than about two hours. We do not open your files, we do not keep copies, and no account is needed to use the converter.