Scroll Animation Preview
Preview CSS scroll-triggered animation behaviors online for free with our scroll animation preview tool. Choose from 12 presets including fade-in, slide-up, scale, flip, rotate, blur, and bounce. Adjust timing, easing, stagger, and threshold with live preview, then copy the ready-to-use CSS and JavaScript code. No signup required.
Preview CSS scroll-triggered animation behaviors with adjustable settings. Choose a preset, tune timing and easing, then scroll the preview panel to see the animation in action. Copy the ready-to-use CSS and JavaScript snippet.
600ms
0ms
15% of element visible
100ms between each
Live Preview
Scroll inside the box to trigger↓ Scroll down to see animations
Fast Performance
Optimised for speed and efficiency
Secure by Default
Privacy-first, no data leaves your device
Beautiful Design
Clean, modern UI that users love
Fully Responsive
Works perfectly on any screen size
Zero Config
Works out of the box, no setup needed
Global CDN
Lightning-fast delivery worldwide
Generated CSS + JavaScript
@keyframes scroll-anim {
from { opacity: 0; }
to { opacity: 1; }
}
.scroll-reveal {
opacity: 0;
animation: scroll-anim 600ms ease-out 0ms both;
animation-play-state: paused;
}
.scroll-reveal.is-visible {
animation-play-state: running;
}
/* Stagger children */
.scroll-reveal:nth-child(1) { animation-delay: 0ms; }
.scroll-reveal:nth-child(2) { animation-delay: 100ms; }
.scroll-reveal:nth-child(3) { animation-delay: 200ms; }
.scroll-reveal:nth-child(4) { animation-delay: 300ms; }
/* JavaScript (Intersection Observer) */
/*
const observer = new IntersectionObserver(
(entries) => {
entries.forEach((entry) => {
if (entry.isIntersecting) {
entry.target.classList.add('is-visible');
observer.unobserve(entry.target);
}
});
},
{ threshold: 0.15 }
);
document.querySelectorAll('.scroll-reveal').forEach((el) => observer.observe(el));
*/Why Use Our Scroll Animation Preview?
Fast, accurate CSS scroll animation prototyping online
Instant Scroll Animation Preview
Preview 12 CSS scroll animation presets in real time with our scroll animation preview tool. Adjust duration, delay, easing, distance, and threshold with sliders and see the animation update instantly in the live preview panel.
Secure Scroll Animation Preview Online
The scroll animation preview tool runs entirely in your browser. No animation configurations, CSS code, or usage data is ever sent to any server. Your design work stays completely private on your device.
Scroll Animation Preview - No Installation
Use the scroll animation preview tool directly in any modern browser with no downloads, plugins, or build tools required. Preview scroll animations from any device and copy the production-ready CSS and JavaScript snippet.
100% Free with 12 Animation Presets
The scroll animation preview tool is completely free with no signup, no usage limits, and no ads. Choose from 12 presets including fade, slide, scale, flip, rotate, blur, bounce, and zoom — each with full timing and stagger controls.
Common Use Cases for Scroll Animation Preview
Practical applications for prototyping CSS scroll animations online
Landing Page Entrance Animations
Use the scroll animation preview tool to prototype fade-in and slide-up animations for landing page sections. Adjust the threshold and stagger delay to create a polished reveal sequence as users scroll down the page.
Feature Card and Grid Animations
Preview staggered scale-in or slide-up animations for feature card grids. The scroll animation preview tool's stagger control lets you set the exact delay between each card to create a cascading reveal effect.
Blog Post and Article Sections
Content-heavy pages benefit from subtle fade-in animations that draw attention to each section as it enters the viewport. Use the scroll animation preview tool to find the right duration and threshold for readable content.
Portfolio and Showcase Pages
Portfolio sites use dramatic scroll animations like flip-in, rotate-in, and zoom-fade to create memorable first impressions. Preview these effects in the scroll animation preview tool before committing to a design direction.
E-commerce Product Listings
Product grids use staggered scale-in animations to make browsing feel dynamic and engaging. The scroll animation preview tool lets you tune the stagger delay and easing to match your brand's personality.
Dashboard and Data Visualization
Charts and data cards benefit from subtle blur-in or fade-in animations that signal loading completion. Use the scroll animation preview tool to find animations that feel informative rather than distracting.
Understanding CSS Scroll Animations
Learn how scroll-triggered animations work and how to implement them
What is a Scroll Animation?
A scroll animation is a CSS animation that triggers when an element enters the browser viewport as the user scrolls. Unlike hover animations, scroll animations require JavaScript to detect when elements become visible. The standard approach uses the Intersection Observer API — a browser-native API that efficiently watches elements and fires a callback when they cross a visibility threshold. Our scroll animation preview tool combines CSS @keyframes animations with an Intersection Observer to simulate exactly how your scroll animations will behave in production. The generated code uses animation-play-state: paused by default and switches to running when the element becomes visible — a pattern that works reliably across all modern browsers.
How Our Scroll Animation Preview Works
- Choose a Preset and Adjust Settings: Select one of 12 animation presets (fade, slide, scale, flip, rotate, blur, bounce, zoom) from the dropdown. Use the sliders to adjust duration (100–2000ms), delay, easing function, translate distance, and the Intersection Observer threshold (how much of the element must be visible before triggering).
- Scroll the Preview Panel: The live preview panel contains 6 demo cards. Scroll down inside the panel to trigger the animations. The scroll animation preview tool uses a real Intersection Observer on the preview container, so the behavior matches production exactly. Click Replay Animation to reset and replay from the top.
- Copy the Generated Code: The output panel shows the complete
@keyframesrule, CSS class definitions, and a JavaScript Intersection Observer snippet. Copy it all with one click and paste it directly into your project.
What the Scroll Animation Preview Generates
- @keyframes Rule: The complete keyframe animation for the selected preset, using
opacity,transform, andfilterproperties that are GPU-composited for smooth performance. - CSS Classes: A
.scroll-revealbase class (hidden, animation paused) and a.is-visiblemodifier class (animation running). Apply.scroll-revealto any element you want to animate on scroll. - Stagger Delays: When stagger is enabled, the output includes
nth-childselectors with incrementalanimation-delayvalues for the first 4 children — ready to use in card grids and feature lists. - JavaScript Snippet: A complete Intersection Observer implementation that adds
.is-visiblewhen elements enter the viewport, with the configured threshold and optional unobserve-after-trigger behavior.
Performance Best Practices for Scroll Animations
For the best scroll animation performance, animate only opacity and transform properties — these are handled by the GPU compositor and do not trigger layout or paint recalculations. Avoid animating width, height, top, left, or margin as these cause expensive layout reflows. The blur-in preset uses filter: blur()which is also GPU-composited in modern browsers but can be expensive on mobile — test on low-end devices before shipping. Always respect the user's prefers-reduced-motion media query by wrapping your scroll animation CSS in @media (prefers-reduced-motion: no-preference) to disable animations for users who have requested reduced motion in their OS settings.
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Frequently Asked Questions About Scroll Animation Preview
Common questions about CSS scroll animations and the Intersection Observer API
A scroll animation preview tool lets you prototype CSS scroll-triggered animations in real time before adding them to your project. Our scroll animation preview covers 12 presets with adjustable duration, delay, easing, distance, threshold, and stagger controls — all running locally in your browser with no signup required.
Scroll animations use the Intersection Observer API to detect when elements enter the viewport. When an element crosses the configured threshold, JavaScript adds a class (like .is-visible) that triggers a CSS @keyframes animation. The animation starts paused (animation-play-state: paused) and switches to running when the class is added.
Yes — the scroll animation preview tool is 100% free with no signup, no account, and no usage limits. Preview and copy as many scroll animation configurations as you need, completely free forever.
The threshold controls how much of the element must be visible in the viewport before the animation triggers. A threshold of 0 triggers as soon as any part of the element enters the viewport. A threshold of 0.5 triggers when 50% of the element is visible. A threshold of 1 triggers only when the entire element is visible. Use 0.1–0.2 for most scroll animations.
When "animate only once" is enabled, the Intersection Observer calls unobserve() after the animation triggers — the element will never animate again even if the user scrolls back up and down. When disabled, the animation re-triggers every time the element enters the viewport. Most landing pages use "once" for a cleaner experience.
Stagger adds an incremental animation-delay to each child element so they animate one after another instead of all at once. The scroll animation preview tool generates nth-child CSS selectors with increasing delays. For example, with a 100ms stagger delay, the first card animates at 0ms, the second at 100ms, the third at 200ms, and so on.
For the best performance, animate only opacity and transform (translate, scale, rotate). These properties are GPU-composited and do not trigger layout or paint recalculations. The scroll animation preview tool's presets use only these properties (plus filter: blur for the blur-in preset). Avoid animating width, height, top, left, or margin.
Wrap your scroll animation CSS in @media (prefers-reduced-motion: no-preference) { ... } to disable animations for users who have requested reduced motion in their OS accessibility settings. This is an important accessibility requirement. The scroll animation preview tool generates the animation CSS — add the media query wrapper when integrating into your project.