Video to WebM Converter
Drop your video, choose the size and download a web-ready WebM.
How to convert video to WebM
- Add your video. Drag and drop an MP4, MOV, WebM, AVI, MKV or other video into the box above, or tap Choose video.
- Set the options. Adjust the resolution, quality and start and end trim. The defaults already work well for most WebM conversions.
- Convert and download. Press Convert to WebM, watch the progress bar, then download your video file. Click Convert another to do the next file.
What is WebM and why convert video to WebM?
WebM is an open video format made for the web. Browsers play it natively, which makes it ideal for website backgrounds and HTML5 players.
With this free video to WebM converter you can:
- Add a lightweight video to a website
- Upload to platforms that prefer open formats
- Create a video for an HTML5 player
Pro tip: For website hero videos, trim to a few seconds and pick 720p to keep pages fast.
Features of our WebM converter
100% private
The video to WebM conversion runs inside your browser with WebAssembly. Your file is never uploaded to a server.
No signup, no watermark
Use the WebM converter as often as you like. There is no account, no email and no logo stamped on your file.
Works on any device
Convert on Windows, Mac, Linux, Android, iPhone and iPad in Chrome, Edge, Firefox or Safari.
Fine control
Change the resolution, quality and start and end trim before converting.
All input formats
Open MP4, MOV, MKV, WebM, AVI, FLV, WMV, 3GP and most other video types.
Fast and free
No queue and no waiting for uploads, so short clips finish in seconds.
Why use our video to WebM tool?
Most online converters make you upload your video, wait in a queue and then download the result from their server. That wastes time and puts private footage on someone else’s computer. Our video to WebM converter does the work right in your browser, so it is faster for short clips and nothing is stored anywhere. When you close the tab, the file is gone.
Video to WebM FAQ
How do I convert a video to WebM?
Drop your video into the converter at the top of this page, adjust the resolution, quality and start and end trim, press Convert to WebM and download the result. It takes three steps and no account.
Is this video to WebM converter free?
Yes. The converter is completely free with no signup, no watermark and no daily limit.
Is it safe? Are my videos uploaded?
No upload happens. The conversion runs locally in your browser using ffmpeg compiled to WebAssembly, so your video never leaves your device.
What is WebM used for?
WebM is an open video format made for the web. Browsers play it natively, which makes it ideal for website backgrounds and HTML5 players. People commonly use it to add a lightweight video to a website.
Which video formats can I convert to WebM?
You can convert MP4, MOV, MKV, WebM, AVI, FLV, WMV, 3GP and most other common video files to WebM.
Is there a file size limit?
Large files work, but because everything runs on your device, very big videos (over 500 MB) need more memory and time. Trim long videos first for the fastest result.
Can I convert video to WebM on iPhone or Android?
Yes. The tool works in mobile Safari and Chrome. On iPhone the download goes to the Files app; on Android it goes to your Downloads folder.
Any tips for the best WebM result?
For website hero videos, trim to a few seconds and pick 720p to keep pages fast.