WMV
Windows Media video
WMV is Microsoft's own video format from the Windows Media Player era. Outside Windows it needs extra software, and browsers do not play it.
Opens in Windows; needs extra software on Mac, iPhone and Android
WMV converterWMV to WebM converter, without the upload.
Turn WMV videos into WebM. It is converted in your browser, so the file never leaves your device.
Drop WMV files here
or choose from your computer paste with Ctrl V
from Photos or Files
Ready · other file types work too0 bytes uploaded, ever
Convert to
- On your device · nothing is uploaded
- No account, no email
- Batch and ZIP download
- Free
How to convert WMV to WebM
Add your WMV videos
Drop WMV files onto the box above, or click it to choose them. ToAny reads the file's contents to detect the type, so a wrong extension does not matter.
WebM is already chosen
Press Convert. Open Options first if you want to change the defaults. The work happens in this tab and can take a while for large files.
Download
Save the WebM, or download everything as one ZIP if you converted several files.
Why ToAny
Private by construction
The WMV to WebM converter is part of this page and runs inside your browser. Your videos are never sent to ToAny or to anyone else.
No upload, no queue
Nothing has to travel to a server and back, so work starts the moment you press Convert. How long it takes depends on your device and the size of the file.
Free, without an account
No sign-up, no email address and no watermark. Add several files and download them together as a ZIP.
WMV to WebM: what to expect
WMV does not play on Macs, phones or in browsers without extra software. WebM is royalty-free and well suited to embedding in web pages. WMV is at home in legacy Windows playback; WebM is the usual choice for royalty-free video on websites.
The defaults suit most files. Under Options you can lower the resolution, trade quality against file size, remove the sound and trim the start and end. This is demanding work for a browser: a long or high-resolution file can take several minutes, and your device does all of it, so keep the tab open.
This pair uses the compatibility engine, ffmpeg built for the browser, because WMV is not handled by the browser's built-in codecs. It is a one-off download of about 10 MB that the browser keeps, it is slower than the built-in codecs, and it takes files up to 1 GB.
WMV vs WebM
WEBM
WebM video
WebM is an open, royalty-free video format built for the web. It is a restricted form of Matroska holding VP8, VP9 or AV1 video. Browsers play it; iPhones, TVs and video editors often do not.
Opens in Chrome, Firefox, Edge and recent Safari; few TVs and editors
WebM converter| WMVWindows Media video | WEBMWebM video | |
|---|---|---|
| Stands for | Windows Media Video | WebM |
| Type | Video format | Video container |
| Compression | Lossy | Lossy |
| Usually contains | WMV video with WMA audio in an ASF container | VP8, VP9 or AV1 video with Vorbis or Opus audio |
| Introduced | 1999, by Microsoft | 2010, by Google |
| Opens in | Windows; needs extra software on Mac, iPhone and Android | Chrome, Firefox, Edge and recent Safari; few TVs and editors |
| Best for | Legacy Windows playback | Royalty-free video on websites |
| File extension | .wmv | .webm |
Questions
Are my videos uploaded anywhere?
No. The WMV to WebM conversion runs inside your browser, on your own phone or computer. The file is not sent to ToAny or to anyone else.
Does converting WMV to WebM reduce quality?
It depends on what is inside the WMV. When its video and audio are already in a form WebM can hold, they can be carried over without being compressed again. Otherwise they are re-encoded, which costs a little quality. Under Options you can favour quality or a smaller file.
Can I convert several WMV files at once?
Yes. Add as many as you like, convert them together and download each result or all of them as one ZIP.
How do I convert WMV to WebM on Windows, Mac, iPhone or Android?
The steps are the same everywhere because ToAny runs in the web browser: open this page in a current version of Chrome, Edge, Safari or Firefox, add the WMV file, press Convert and save the WebM. There is nothing to install.
Is there a file size limit?
Yes. WMV to WebM runs on the compatibility engine, which takes files up to 1 GB, and a long clip takes a while because it is slower than the browser's built-in codecs. Beyond that the limit is your device's memory, since nothing is uploaded; a computer copes with large files better than a phone.