CSS Animation Generator

Create CSS @keyframes animations visually. Define keyframes, timing, and easing with live preview.

How it works: Define keyframes with transforms and opacity. Adjust timing, easing, and duration. Preview your animation live and copy the CSS.

0%25%50%75%100%

@keyframes fadeIn {
  0% {
    transform: translate(0px, 20px);
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}

.animated-element {
  animation: fadeIn 0.8s ease 0s 1 normal forwards;
}

What are CSS Animations?

CSS animations allow you to animate HTML elements without JavaScript. Using @keyframes rules, you define the styles at various points during the animation sequence. The browser smoothly interpolates between keyframes, creating fluid transitions for transforms, opacity, colors, and more.

How to Use the Animation Generator

Choose a preset or start from scratch. Add keyframes at specific percentages (0% to 100%) and set transform and opacity values for each. Adjust the animation duration, timing function, delay, and iteration count. Preview the animation in real time and copy the generated CSS when you're satisfied.

Animation Timing Functions

The timing function controls the speed curve of the animation. 'ease' starts slow, speeds up, then slows down. 'linear' maintains constant speed. 'ease-in' starts slow and accelerates. 'ease-out' starts fast and decelerates. For custom curves, use cubic-bezier() with four control points.

CSS Animation Best Practices

  • Prefer transform and opacity for animations — they're GPU-accelerated and don't trigger layout recalculation
  • Use will-change sparingly to hint the browser about upcoming animations
  • Keep animations under 300ms for UI feedback, 500ms-1s for transitions
  • Use prefers-reduced-motion media query to respect accessibility settings
  • Avoid animating width, height, top, left — use transform: translate() instead
  • Use animation-fill-mode: forwards to keep the final state after animation ends