Design

CSS Animation Generator

Create CSS keyframe animations from ready-made fade, slide, zoom, rotate, and attention effects. Tune duration, delay, easing, repeat count, direction, and fill mode while a live element plays the result, then copy a complete @keyframes block and animation rule for your stylesheet. The generator is useful for entrance animations, loaders, hover feedback, toasts, and hero sections, and everything runs locally in the browser.

  • Pick from fade, slide, zoom, rotate, and attention animation presets
  • Tune duration, delay, timing function, iteration count, direction, and fill mode live
  • Watch a demo element play the animation on a loop, with replay and pause controls
  • Copy a complete @keyframes block plus the animation shorthand, ready to paste
  • Everything runs locally in the browser, so nothing is uploaded while you design
tools/CSS Animation Generator
Fade in up
6
1000ms
0ms
fadeInUp
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translate3d(0, 24px, 0);
  }
  to {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
}

.animated-element {
  animation: fadeInUp 1000ms ease 0ms infinite normal both;
}
Quick actions

Overview

Put the keyframes and the motion they produce side by side, so an animation becomes something you watch and adjust rather than a block of CSS you guess at and reload to check.

  1. 01

    A curated effect library

    Start from named effects grouped into fades, slides, zooms, attention seekers, and rotations instead of writing every keyframe from a blank file.

  2. 02

    Live looping preview

    A demo element plays the selected animation on a loop with replay and pause, so you judge the real motion, not a static description of it.

  3. 03

    Full animation controls

    Adjust duration, delay, timing function, iteration count, direction, and fill mode, and watch each change take effect immediately.

  4. 04

    Standard, copy-ready output

    The result is a real @keyframes block and an animation shorthand using normal CSS property names, ready to paste into any stylesheet.

  5. 05

    Easing built in

    Pick from the CSS keywords or a spring-like cubic-bezier so the same keyframes can read as smooth, snappy, or bouncy.

  6. 06

    Private by design

    The library, preview, and CSS generation all run locally in the browser, so unreleased interface work never leaves your machine.

How to use

Turn a rough idea of how an element should appear or react into a complete, copy-ready CSS animation.

  1. 01

    Pick an effect from the library that is close to the motion you have in mind.

  2. 02

    Set the duration and delay until the animation plays at a pace that feels right.

  3. 03

    Choose a timing function and watch how it changes the feel of the same keyframes.

  4. 04

    Set iteration count, direction, and fill mode to control how the animation repeats and settles.

  5. 05

    Use replay to re-watch the motion, then copy the @keyframes and shorthand into your stylesheet.

Details

An animation is more than an easing curve, so the generator covers both the keyframes that define the motion and the properties that control how it runs.

  • A library of named effects grouped into fade, slide, zoom, attention, and rotate categories
  • A looping demo element so each effect is judged as real motion rather than from its name
  • Replay and pause controls to re-watch or freeze the animation while tuning it
  • Duration and delay sliders that update the preview the instant they change
  • Timing function presets covering the CSS keywords plus a spring-like cubic-bezier
  • Iteration count including a true infinite loop for ambient and looping effects
  • Direction control for normal, reverse, alternate, and alternate-reverse playback
  • Fill mode control so the element holds its start or end state before and after running
  • Output that pairs a complete @keyframes block with the matching animation shorthand
  • Entirely local generation in the browser, so confidential interface motion stays private

Use cases

Animation guides attention, signals state, and adds polish, but the right effect depends on what is happening and why. Trying it against a live element is the fastest way to decide what fits.

  1. Entrance animations

    Fade, slide, and zoom effects bring elements onto the screen smoothly as content loads or scrolls into view.

  2. Attention and feedback

    Shake, pulse, and bounce draw the eye to an error, a new message, or a button that needs a response.

  3. Loading and ambient motion

    An infinite spin or pulse keeps loaders and idle indicators alive without demanding the user notice them.

  4. Hover and interaction polish

    A quick zoom or wobble on hover or click makes interactive elements feel responsive and intentional.

  5. Toasts and notifications

    Slide a toast in from an edge and have it settle, so incoming messages read as arriving rather than appearing.

  6. Marketing and hero sections

    Staggered fades and slides on a landing page give a hero section rhythm and a sense of being designed.

  7. Learning CSS animations

    Reading the generated @keyframes next to the live result is a clear way to understand how the animation syntax maps to motion.

  8. Building a motion system

    Settle on a small set of reusable named animations so motion across a product shares one consistent feel.

See also

Animation timing is shaped by easing, so refine the curve itself with the Cubic Bezier Generator , and when an effect also changes elevation, pair it with depth from the Box Shadow Generator so motion and shadow move together rather than fighting each other.

Best practices

Animation is easy to overuse, so a few habits keep motion feeling purposeful and consistent rather than busy or distracting.

  • Animate transform and opacity where possible, since they are the cheapest properties for the browser to animate smoothly.
  • Keep entrance and interaction animations short, roughly 200 to 500ms, so the interface stays quick to use.
  • Reserve attention seekers like shake and bounce for moments that genuinely need to be noticed.
  • Use an infinite loop only for ambient motion such as loaders, not for content the user is trying to read.
  • Match the timing function to the intent, using ease-out for entrances and ease-in for exits.
  • Use fill mode forwards or both when an element should hold its end state after the animation finishes.
  • Respect reduced-motion preferences by toning down or removing large movements for users who ask for it.
  • Standardize on a few named animations rather than a unique set of keyframes for every component.

Limitations

This tool focuses on generating CSS keyframe animations, so a few related areas are intentionally out of scope.

  • It generates CSS @keyframes animations, not JavaScript or library-driven animations such as spring physics.
  • Effects animate a single demo element, so confirm staggering and sequencing across multiple elements in your own layout.
  • It outputs the animation, not the surrounding layout, so positioning and sizing come from your existing CSS.
  • The preview uses a fixed demo element, so verify the feel on your real components at their actual size.
  • Scroll-triggered and view-timeline animations are a separate mechanism and are not generated here.
  • Perceived smoothness also depends on frame rate and what else is repainting, which this editor does not measure.

FAQ

Questions that come up most often when building CSS animations and turning an effect into stylesheet code that ships.

What is a CSS keyframe animation?

It is an animation defined with a @keyframes rule that lists how properties change across the timeline, then applied to an element with the animation property to control duration, easing, repetition, and more.

Is the generated CSS ready for production?

Yes. The output is a standard @keyframes block and animation shorthand that can be pasted into any stylesheet without changes. You may rename the keyframes or the selector to fit your code.

What does fill mode do?

animation-fill-mode controls what the element looks like before and after the animation runs. forwards holds the final keyframe, backwards applies the first keyframe during any delay, and both does each.

How do I make an animation loop forever?

Set the iteration count to infinite. Combine it with the alternate direction so the animation reverses each cycle instead of jumping back to the start, which suits pulses and ambient motion.

How do I create a CSS fade-in or slide-in animation?

Choose a fade or slide preset, adjust the duration and easing until the preview feels right, then copy the generated @keyframes and animation rule. You can rename the keyframes and selector before pasting them into your stylesheet.

Which properties are best to animate?

transform and opacity are the most performant because the browser can animate them without expensive layout or paint work. The library favors these so the effects stay smooth.

Can I change the easing of an effect?

Yes. Pick any timing function, including a spring-like cubic-bezier, and the same keyframes will read as smooth, snappy, or bouncy depending on the curve you choose.

Is anything uploaded while I design?

No. The effect library, live preview, and CSS generation all run locally in the browser, so the tool is safe for unreleased product UI and confidential interface motion.

Related tools

Motion is one layer of a polished interface. With the animation decided, refine the easing and depth so timing, elevation, and movement all read as part of one considered design.