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Animations · Generator

Scroll Animation Generator

Generate CSS scroll-triggered animations (fade, zoom, slide) with IntersectionObserver code.

Animation Type

Timing

600ms
0ms

Effect

40px

Preview

Scroll Animation
Generated CSS
/* Add to your CSS */
@keyframes scroll-fade-up {
  from { opacity: 0; transform: translateY(40px); }
to { opacity: 1; transform: translateY(0); }
}

/* Apply to elements */
.animate-on-scroll {
  opacity: 0;
  animation: none;
}

.animate-on-scroll.is-visible {
  animation: scroll-fade-up 600ms ease-out 0ms forwards;
}

/* JavaScript to trigger */
const observer = new IntersectionObserver((entries) => {
  entries.forEach(entry => {
    if (entry.isIntersecting) {
      entry.target.classList.add('is-visible');
      observer.unobserve(entry.target); // run once
    }
  });
}, { threshold: 0.1 });

document.querySelectorAll('.animate-on-scroll').forEach(el => observer.observe(el));
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What is this

What is the CSS Scroll Animation Generator?

Generate CSS scroll-driven animation code using the Animation Timeline API. Create elements that animate as they scroll into view without JavaScript.

Everything runs locally in your browser. Adjust the controls above, preview instantly, and copy clean, production-ready CSS — no account, no upload.

How to use

Using the CSS Scroll Animation Generator

Everything lives in the panel at the top of this page. There is nothing to install — it all runs right here in your browser.

1

Choose animation type

Select fade-in, slide-in, scale-up, or parallax. Each effect shows a preview of how it behaves as you scroll.

2

Set the animation range

Define when the animation starts and ends relative to the viewport: entry (element entering), cover (element filling screen), or exit (element leaving).

3

Copy CSS with fallback

Click Copy to get the @keyframes, scroll-driven animation rules, and a @supports fallback for browsers that do not support the Animation Timeline API.

The output

What the generated code looks like

Clean, production-ready CSS — no vendor bloat, no unnecessary declarations.

styles.css
/* Fade in on scroll - modern CSS scroll-driven animations */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(40px); }
  to   { opacity: 1; transform: translateY(0); }
}

.scroll-reveal {
  animation: fadeInUp linear both;
  animation-timeline: view();
  animation-range: entry 0% entry 30%;
}

/* Fallback for browsers without scroll-driven animations */
@supports not (animation-timeline: view()) {
  .scroll-reveal { opacity: 1; transform: none; }
}

Scroll-driven animations are supported in Chrome 115+ and Edge 115+. Firefox and Safari require a fallback or JavaScript. The @supports block above provides a safe fallback.

Pro tips

Pro tips for better results

★

Always include a @supports fallback

animation-timeline is only in Chrome 115+, Edge 115+. Firefox and Safari need a fallback. The safest fallback makes the element visible without animation: opacity: 1; transform: none.

★

animation-range controls the scroll window

entry 0% entry 30% means the animation plays as the element enters the viewport for the first 30% of its entry phase. cover means the animation plays while the element covers the viewport.

★

Use prefers-reduced-motion with scroll animations too

Scroll-driven animations can be more intense than time-based ones because the user controls the speed. Always include a reduced-motion override.

FAQ

Frequently asked questions

No. animation-timeline is supported in Chrome 115+, Edge 115+, and Opera 101+. Firefox and Safari do not yet support it (as of early 2026). Use a @supports fallback and consider IntersectionObserver as a JS alternative for full browser coverage.
No. Everything runs in your browser. Nothing is sent to a server.

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