CSS Keyframe Animation Generator Online Free
Build custom CSS keyframe animations visually: pick a motion preset (bounce, pulse, shake, flip, spin, fade, custom), set duration, delay, iteration count, direction and timing function, then watch a live demo box perform the animation on loop. Scrub individual keyframe stops to tweak transforms and opacity, and copy the complete @keyframes block plus the animation shorthand property into your stylesheet. Everything is pure CSS output — no JavaScript animation library required at runtime.
CSS Keyframe Animation Generator In-Browser Workspace
Input data or select files to begin. 100% private, client-side execution with zero server transmission.
How to Use CSS Keyframe Animation Generator
- Step 1: Select a preset animation or start from an empty custom timeline.
- Step 2: Set duration, delay, iteration count (or infinite), direction and fill mode.
- Step 3: Choose an easing curve: ease, linear, ease-in-out or a cubic-bezier value.
- Step 4: Edit keyframe percentages to adjust transform/opacity stops; preview loops live.
- Step 5: Copy the generated @keyframes rule and animation property into your CSS.
About CSS Keyframe Animation Generator
CSS animations separate what happens (@keyframes) from how it is applied (the animation property). A @keyframes block maps percentage stops — 0% is the start, 100% the end, intermediate stops like 50% are optional — each declaring properties such as transform and opacity that the browser interpolates over time. The animation shorthand bundles name, duration (how long one cycle runs), timing-function (the easing curve: linear is constant speed, ease accelerates then decelerates, cubic-bezier(x1,y1,x2,y2) customizes the curve), delay (pause before starting), iteration-count (N or infinite), direction (normal, reverse, alternate ping-pongs, alternate-reverse), fill-mode (forwards keeps the final state after stopping — critical for one-shot entrances) and play-state. Bounce is modeled as a vertical translate with easing that overshoots; pulse scales 1 → 1.05 → 1; shake translates horizontally in rapid stops; flip rotates on rotateY with perspective on the parent; spin is a full rotate(360deg). Because interpolation is done by the compositor when only transform/opacity change, these animations avoid layout thrash and stay smooth at 60fps. prefers-reduced-motion media queries should wrap motion-heavy effects for accessibility — the generator can emit a suggested wrapper. Percentages must be non-decreasing (a stop earlier than a previous one is invalid); keyframes without a 100% still work because the element holds its base style, but defining both ends avoids surprises. The output is a self-contained snippet you can drop into any project, theme or email-safe inline style block.
Frequently Asked Questions
Do these animations need JavaScript?
No — output is pure @keyframes plus the animation property; browsers run it natively.
Why does my animation disappear after it ends?
One-shot animations reset unless you set fill-mode: forwards (or both) to retain the final keyframe state.
Can I use these in email HTML?
Most email clients strip @keyframes; use them on web pages and landing pages instead.
How do I respect reduced-motion preferences?
Wrap the animation rule in @media (prefers-reduced-motion: no-preference) or disable it with reduce.
Transform vs animating width — which is better?
Animating transform/opacity stays on the GPU; layout properties like width trigger reflow and drop frames.