MP4WebM
Free online converter. No signup, no watermark. Just drop your file.
Tap to upload or drop a file
.mp4 files · Max 100MB
How it works
Upload
Drop .mp4
Convert
Instant
Download
Get .webm
About MP4 and WebM
What is MP4?
MP4 is the most universally supported video container format, compatible with virtually every device and platform.
What is WebM?
WebM is an open-source video format optimized for the web, using VP8/VP9 codecs for efficient streaming.
FAQ
Is this free?
Yes, completely free. No signup, no watermarks, no hidden fees.
Is my file safe?
Files are converted on our servers and immediately deleted. We never store or share your files.
What's the maximum file size?
You can convert files up to 100MB.
Why use WebM over MP4?
WebM uses royalty-free codecs and is optimized for web playback, making it preferred for HTML5 video embedding.
Do all browsers support WebM?
All modern browsers support WebM, including Chrome, Firefox, Edge, and Safari (version 14.1+).