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Build Custom CSS Keyframe Animations Create CSS keyframe animations with preset effects and customizable timing.

CSS Animation Generator illustration
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CSS Animation Generator

Create CSS keyframe animations with preset effects and customizable timing.

1

Choose an animation preset

Select from bounce, fade, slide, spin, shake, pulse, or flip animations.

2

Customize timing

Adjust duration, timing function, delay, iteration count, and direction.

3

Copy the CSS

Preview the animated element and copy the keyframes and animation CSS.

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What Is CSS Animation Generator?

The CSS Animation Generator helps you create keyframe-based CSS animations with a library of preset effects and full timing customization. CSS animations bring web pages to life by moving, transforming, and transitioning elements over time. This tool provides seven popular animation presets: bounce, fade, slide, spin, shake, pulse, and flip—each with properly defined @keyframes. You can customize every aspect of the animation: duration controls how long each cycle takes, timing function sets the speed curve, delay adds a pause before starting, iteration count determines how many times it plays, direction controls playback order, and fill mode defines the element state before and after the animation. The live preview shows the animation in action.

Why Use CSS Animation Generator?

  • Seven popular animation presets ready to use
  • Full control over duration, timing, delay, and iteration
  • Animation direction and fill mode controls
  • Generated CSS includes complete @keyframes definitions

Common Use Cases

Entrance Animations

Animate elements as they enter the viewport for engaging user experiences.

Loading Indicators

Create animated loading states with pulse, spin, or bounce effects.

Attention-Seeking

Use shake or pulse to draw attention to important elements.

Page Transitions

Add slide and fade animations for smooth page or section transitions.

Technical Guide

CSS animations use the animation shorthand property with @keyframes rules. The animation property combines: animation-name (references the @keyframes rule), animation-duration, animation-timing-function (ease, linear, ease-in, ease-out, ease-in-out, or custom cubic-bezier), animation-delay, animation-iteration-count (number or infinite), animation-direction (normal, reverse, alternate, alternate-reverse), animation-fill-mode (none, forwards, backwards, both), and animation-play-state (running, paused). The @keyframes rule defines the animation stages using percentages (0% to 100%) or from/to keywords. For performance, animate only transform and opacity properties when possible, as these can be GPU-accelerated. Other properties like width, height, margin, and padding trigger layout recalculations. Use the will-change property to hint the browser about upcoming animations.

Tips & Best Practices

  • 1
    Use animation-fill-mode: both to maintain the final state after animation ends
  • 2
    Animate only transform and opacity for GPU-accelerated performance
  • 3
    Add prefers-reduced-motion media query for accessibility
  • 4
    Use alternate direction for natural back-and-forth animations

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Frequently Asked Questions

Q What is the difference between animation and transition?
Transitions require a trigger (like hover) and animate between two states. Animations can run automatically with multiple keyframe stages.
Q Can I chain multiple animations?
Yes, use comma-separated values in the animation property or use animation-delay to sequence them.
Q How do I pause an animation?
Set animation-play-state: paused to pause, and running to resume.
Q What does animation-fill-mode do?
It defines element state before/after animation. forwards keeps the final state, backwards applies the first keyframe during delay.
Q Are CSS animations accessible?
Yes, but add a prefers-reduced-motion media query to provide alternatives for users sensitive to motion.

About This Tool

CSS Animation Generator is a free online tool by FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration or installation required.