No data is ever sent to a server
Use instantly without registration
Pure CSS animations β no JS libraries needed
Preset β
/* Select a preset to generate CSS */
CSS Scroll Animation Generator creates scroll-driven CSS animations using the modern animation-timeline property β entirely without JavaScript.
Choose from 10 preset effects like fade in, scale up, slide in, rotate, and blur reveal. Adjust the start and end timing with sliders and copy the complete CSS code with one click.
All processing happens in your browser. No data is ever sent to a server. No registration required β start using it right away for free.
Choose a Preset
Pick a scroll animation effect from 10 presets including Fade In, Scale Up, and Slide In. Scroll in the preview area to see it in action.
Adjust Timing
Fine-tune the Timeline (view/scroll), animation-range start/end positions, and easing to precisely control when the animation triggers and completes.
Copy the Code
Copy the generated @keyframes + animation-timeline CSS code with the π button. Paste it directly into your project for instant scroll animations.
- animation-timeline
- A CSS property that links animation progress to scroll position instead of time. The animation advances as the user scrolls.
- view()
- A timeline function based on when an element enters/exits the viewport. Ideal for per-element scroll animations.
- scroll()
- A timeline function based on the entire scroll container's position. Suited for page-level scroll progress animations.
- animation-range
- Specifies where within the timeline an animation starts and ends. Uses phases like entry, cover, contain, and exit.
- Compositor Thread
- A dedicated browser thread for rendering. Animations using transform and opacity run here without blocking the main thread, ensuring smooth 60 FPS performance.
- Progressive Enhancement
- A design approach where supported browsers get rich scroll animations while unsupported ones show static content. No layout breakage occurs.
CSS scroll animations are powered by the animation-timeline property β a fundamentally different approach from JavaScript-based scroll monitoring.
How It Differs from JavaScript Approaches
Traditionally, scroll animations required JavaScript libraries like GSAP ScrollTrigger or Intersection Observer to watch scroll positions and toggle CSS classes. This runs on the main thread and can cause jank on complex pages.
How animation-timeline Works
animation-timeline pairs with standard @keyframes. Instead of progressing over time, the animation progresses with scroll position when animation-timeline: view() is set. It runs on the compositor thread, guaranteeing smooth 60 FPS performance.
Browser Support
Supported in Chrome 115+, Edge 115+. Firefox does not yet support it (as of March 2026). In unsupported browsers, animation-timeline is simply ignored and elements display in their final state.
- Q. Is my data sent to a server?
- A. No. All processing happens entirely in your browser. No data β including generated CSS β is ever transmitted to any server.
- Q. Does it work on mobile?
- A. Yes. The tool is responsive and works on mobile browsers. However, the preview is best experienced on desktop.
- Q. Will the generated CSS work in older browsers?
- A. In browsers that don't support animation-timeline, the animation simply won't play β but the layout will remain intact (progressive enhancement).
- Q. Is JavaScript really not needed?
- A. Correct. The generated code is 100% pure CSS. No JavaScript libraries are loaded, so it won't affect page load speed.
- Q. Does it work in Firefox?
- A. As of March 2026, Firefox does not support animation-timeline. Animation effects won't appear, but this is expected to change as the spec matures.
- Q. Can I use the CSS in React or Vue?
- A. Yes. The output is standard CSS that works with React, Vue, Next.js, Nuxt, and any other framework.
- Q. Is it free?
- A. Yes. Completely free with no usage limits.
Landing Pages & Portfolios
Create eye-catching content reveals with scroll-linked fade-ins and scale animations that engage visitors instantly.
Design Prototyping
Quickly prototype scroll animation ideas and fine-tune parameters in real-time for client presentations.
Performance Optimization
Replace JS libraries (GSAP, ScrollReveal) with native CSS for reduced bundle sizes and GPU-accelerated 60 FPS animations.
Mobile-First Development
CSS compositor-based animations use less battery and ensure smooth scrolling on mobile devices.
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