What is the CSS Animation Generator?
Build CSS keyframe animations with a visual editor. Set timing, easing, iteration, and fill mode, then copy the complete @keyframes and animation declaration.
Everything runs locally in your browser. Adjust the controls above, preview instantly, and copy clean, production-ready CSS — no account, no upload.
Using the CSS 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.
Choose an animation type
Select from fade, slide, scale, rotate, bounce, or custom. The preview shows the animation immediately on a sample element.
Set timing and easing
Adjust duration, delay, easing curve, and iteration count. Toggle fill-mode between none, forwards, backwards, and both.
Copy the CSS
Click Copy to get the @keyframes block and the animation property declaration together, ready to paste.
What the generated code looks like
Clean, production-ready CSS — no vendor bloat, no unnecessary declarations.
@keyframes fadeInUp {
from {
opacity: 0;
transform: translateY(20px);
}
to {
opacity: 1;
transform: translateY(0);
}
}
.card {
animation: fadeInUp 0.4s ease-out both;
}
/* Respect user preference for reduced motion */
@media (prefers-reduced-motion: reduce) {
.card { animation: none; }
}Always include a prefers-reduced-motion media query. Some users experience motion sickness from animations.
Pro tips for better results
Keep animations under 300ms for UI feedback
Button clicks and state changes feel snappy at 150-200ms. Page transitions work at 250-350ms. Longer animations feel slow and frustrate repeat users.
Animate transform and opacity only for 60fps
transform and opacity are composited on the GPU and do not trigger layout or paint. Animating width, height, margin, or background-color forces reflow and causes jank.
animation-fill-mode: both is usually what you want
both applies the from values before the animation starts (during the delay) and the to values after it ends. This prevents elements from snapping back to their original state.
Add will-change: transform for complex animations
will-change: transform hints to the browser to promote the element to its own compositor layer, reducing jank on complex animations. Remove it after the animation completes with JavaScript.
Always include prefers-reduced-motion
Users who have enabled reduced motion in their OS accessibility settings should not see animations. Wrap animations in @media (prefers-reduced-motion: no-preference) or disable them with @media (prefers-reduced-motion: reduce).
Frequently asked questions
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