Video converters
Convert MP4 to WEBM
Convert MP4 video files to WEBM without uploading them. Optionally shrink the resolution or trim the clip.
Drop MP4 files here, or click to choose
Up to 3 files, 200.0 MB each · Files stay on your device
How it works
How to use the MP4 to WEBM converter
- Drop your MP4 files into the box.
- Choose a resolution and quality, and optionally trim.
- Click Convert and download the WEBM.
Formats
About the formats
- MP4 video
- MP4 is the most compatible video format. It plays on virtually every phone, computer, TV and website.
- WebM video
- WebM is an open video format designed for the web. Browsers play it natively, but many editors and Apple devices don't.
FAQ
Frequently asked questions
Are my files uploaded?
No. The conversion runs inside your browser using WebAssembly, so your files never leave your device. Nothing is sent to our servers.
How big can my video files be?
Up to 200 MB each on the free plan and 2 GB with Pro. Very large files depend on your device's memory.
Why is the first conversion slower?
The first time, your browser downloads the converter (a few MB). It's cached, so later conversions start right away. Where your browser supports it, video uses your device's hardware encoder.
Keep going
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