RecBeamFree tool
Convert MP4 to WebM
Convert MP4 to WebM, the open video format used across the web, for smaller files on your own site.
- Free, no watermark
- Files stay on your device
- No sign-up
Drop your MP4 file here
or
Choose a file to start. It is processed in your browser and never uploaded.
MP4 to WebM in three steps
Choose your file
Drop a MP4 file into the box above or pick one from your computer.
Convert in your browser
RecBeam's converter runs on your own device, so nothing is uploaded anywhere.
Download
Preview the result and save it. No watermark, no account.
Why convert MP4 to WebM
WebM (VP8 + Vorbis) is an open format that every modern browser plays natively, which is handy for website video.
Record it right the first time
RecBeam records your screen, camera and voice in Chrome and gives you a shareable link the moment you stop. Free to start.
Get RecBeam for ChromeHow to convert MP4 to WEBM
- Drop your MP4 file (or files) onto the page, or choose them from your computer.
- Press Convert. Everything runs in your browser, so a progress bar shows the work on your own device.
- Download the WEBM result.
About MP4 and WEBM
MP4 is the most widely supported video container. It usually holds H.264 video with AAC audio and plays on phones, TVs, editing software, social platforms and every major browser.
WebM is an open, royalty-free video format created for the web. It usually holds VP8, VP9 or AV1 video with Opus or Vorbis audio, and it plays in Chrome, Edge and Firefox. Many phones, TVs and editing programs handle it poorly or not at all.
When to convert MP4 to WEBM
Convert to publish video on a web page, where WebM keeps files efficient in Chrome-based browsers.
Tip
Keep an MP4 copy for devices and editors that do not play WebM.
Your files stay on your device
This tool runs in your browser. Your files are not uploaded to RecBeam or anywhere else, there is no sign-up and nothing is added to your file. Browse all the free tools.
MP4 to WebM: frequently asked questions
Is WebM smaller than MP4?
Often, but it depends on the video. For the widest device support, keep an MP4 copy too.
Is it really free?
Yes. There is no price, no account, no watermark and no limit on how many files you convert.
Are my files uploaded?
No. The conversion runs entirely in your browser on your own computer. Your video never leaves your device.
Is there a file size limit?
Files up to about 1 GB work well. Very large files depend on your computer's memory and can be slow.
Why does the first conversion take longer?
The first time, your browser downloads the converter (about 30 MB). It is cached after that.