Particul8

Type in the box. Each word (or character, or sentence, your call) becomes a shape, and a few thousand particles spring from one shape to the next. Emoji bring their own colors. A blank line is an empty keyframe, so “blank, word, blank” makes a clip that loops in from nothing and back out. Everything below the stage previews live, so drag things around until it looks right, then copy a link that reproduces it exactly.

When it looks right, export it. MP4 up to 4K renders in the browser, frame-exact from the same seed you’re watching. GIF for the places that only take GIFs. A zipped PNG sequence with a transparent background for compositing over something else. Or a single HTML file that plays at any size with nothing to install. If you’d rather put it on your own page, the embed code is one script tag and one element, and it loads the engine from here the way a web font would.