HTML to Video Converter

What does HTML to Video do?

This tool takes an HTML/CSS snippet — typically one with a CSS animation or transition — and renders it frame by frame into an actual MP4 video file. It works by stepping the animation forward in fixed time increments (say, 1/30th of a second for 30fps), capturing each frame's rendered output, and feeding that sequence into the browser's WebCodecs API to encode a real video stream, rather than recording your screen or relying on a screen-capture API.

Because it renders frame-by-frame rather than capturing in real time, the output is frame-perfect regardless of your machine's actual performance while rendering — a complex animation that would stutter if screen-recorded in real time still exports as a smooth, consistent video, since each frame gets as long as it needs to render before being captured.

When to use it

Use it to turn a CSS loading spinner, an animated logo reveal, a UI micro-interaction, or a data visualization built in HTML/CSS into a video file you can embed where CSS animations won't play — a slide deck, a video editor timeline, a platform that only accepts video uploads, or a GIF-replacement in contexts that need actual video (smaller file size, better compression than GIF, and audio support if you ever add it).

It's also useful for design QA: exporting an animation as video gives you a frame-accurate artifact you can scrub through and compare against a spec, rather than relying on eyeballing the live CSS animation in a browser tab.

Example

Write a 2-second CSS keyframe animation of a logo fading and scaling in, set the export to 1080×1080 at 30fps, and run the conversion — the tool steps through 60 frames, capturing each one, and encodes them into an MP4 roughly 2 seconds long via WebCodecs. The output downloads directly as a video file with no watermark, ready to drop into a slide or upload to a platform that doesn't support embedded HTML/CSS.