Why use MorphFlux?
MP4 to WEBM conversion runs entirely in your browser — open-source format for web projects, no server upload.
Open-source WEBM output
WEBM uses the VP8/VP9 codec which is completely royalty-free, making it ideal for open-source and web projects.
Runs locally in your browser
Your MP4 files are processed entirely on your device using FFmpeg WebAssembly. Nothing is uploaded to any server.
Optimized for web streaming
WEBM is designed for efficient web streaming with fast seek times and good compression for browser playback.
Free with no signup required
Convert as many MP4 files to WEBM as you need, completely free. No account, no email, no credit card required.
When would you need this?
Common scenarios where converting MP4 to WEBM is useful for web development.
Converting MP4 video to WEBM for use as an HTML5 video source on a website
Preparing MP4 files as WEBM for open-source projects tharequire license-free video formats
Converting MP4 to WEBM for use in web-based video editors or browser applications
About MP4 and WEBM
Understanding why WEBM is preferred for web video and HTML5 projects.
What is MP4?
MP4 (MPEG-4 Part 14) is the most widely used video format. While broadly compatible, MP4 uses H.264 which requires liing for some use cases.
What is WEBM?
WEBM is an open-source video format developed by Google that uses VP8 or VP9 video codec. WEBM is license-free, optimized for web streaming, and supported by all modern browsers as an HTML5 video source.
Frequently Asked Questions
Everything you need to know about converting MP4 to WEBM online.
Related Tools
More free converters you might find useful.