CSS Scroll Animation Builder
Choose an effect, distance, duration, and easing to generate CSS that stays visible without JavaScript and respects reduced motion.
Choose values, then generate. Generated locally; the fallback stays visible without JavaScript.
A QUICK WALKTHROUGH
How to use this tool
- Choose an effect and bounded numeric values.
- Copy the generated CSS and optional observer script.
- Add the class to an element and test keyboard and reduced-motion behavior.
Bounded output
Values are clamped to safe limits and the generated text is capped at 200 characters for predictable copy and embedding.
Progressive enhancement
Without JavaScript or IntersectionObserver, the element stays visible. With support, the animation runs once on entry.
Motion preference
A prefers-reduced-motion rule disables transitions and keeps the element visible.
GOOD TO KNOW
Common questions
Does the output need a library?
No. It uses CSS and the browser IntersectionObserver API when available.
What happens without JavaScript?
The element stays visible because the fallback state is visible by default.
Can I use it for repeated cards?
Yes. Add the generated class to each element; each one reveals independently.