CSS Animation Builder

Create stunning CSS animations with a visual timeline editor. Design keyframes, preview in real-time, and export production-ready code.

Visual TimelineLive PreviewExport CSS

Animation Settings

Keyframes Timeline

0.0%0 properties
100.0%0 properties

Preview

Animation Queue

Add presets to create a sequence

Animation Presets

Generated CSS

Free CSS Animation Builder — Visual Keyframe Editor

CSS animations let you create smooth, performant motion effects entirely in the browser without JavaScript or external libraries. Our free CSS animation builder provides a visual timeline editor where you can create keyframes, set properties like opacity, transform, color, and size at any point in the animation, then preview the result in real time before exporting clean, production-ready CSS code.

CSS animations are GPU-accelerated, work on all modern browsers, and outperform JavaScript-based animations in smoothness and battery efficiency. Build fade-ins, slides, bounces, rotations, and custom multi-property animations — all exportable as a single @keyframes rule and animation declaration you can drop into any stylesheet.

How to Build a CSS Animation

  1. 1

    Choose or create an animation

    Select a preset animation (fade, slide, bounce, rotate, pulse) to start from, or click "New Animation" to build from scratch with a blank timeline.

  2. 2

    Add keyframes

    Click the timeline at any percentage point (0%, 25%, 50%, 100%) to add a keyframe. Each keyframe defines the CSS property values at that moment in the animation.

  3. 3

    Set properties per keyframe

    For each keyframe, configure the CSS properties to animate: opacity (0-1), transform (translate, scale, rotate, skew), background-color, width, height, border-radius, and more.

  4. 4

    Configure animation settings

    Set the animation duration (e.g., 0.5s, 2s), timing function (ease, ease-in-out, cubic-bezier), iteration count (once, infinite, or a number), delay, and fill mode.

  5. 5

    Preview and export

    See a live preview of your animation applied to an element. Once satisfied, click Export CSS to copy the @keyframes rule and animation property, ready to paste into your stylesheet.

CSS Animation Use Cases

UI Micro-interactions

Animate buttons on click, form inputs on focus, checkboxes on toggle, and notifications on appearance. Micro-interactions make interfaces feel alive and responsive.

Loading Spinners & Skeletons

Create infinite-loop spinner animations and skeleton loading screens that communicate to users that content is loading — without JavaScript.

Page Transitions & Reveals

Animate elements into view as users scroll (fade up, slide in) or when navigating between pages for a polished, app-like experience.

Hero Section Animations

Animate headline text, hero images, and CTAs to draw attention and create a memorable first impression on landing pages.

Data Visualization

Animate chart bars, donut segments, and numbers counting up to make dashboards more engaging and easier to comprehend.

Game Development

Build simple CSS-based sprite animations, blinking effects, and movement for browser-based casual games or interactive experiences.

Frequently Asked Questions

What is the CSS @keyframes rule?
@keyframes defines the sequence of styles that make up a CSS animation. You specify CSS properties at percentage points (0% = start, 100% = end) and the browser interpolates between them. The animation is then applied to an element using the animation property.
What is the difference between CSS transitions and CSS animations?
CSS transitions animate between two states (e.g., hover state and normal state) triggered by an event. CSS animations (using @keyframes) can have multiple steps, run automatically on page load, loop indefinitely, and run in reverse — making them more powerful for complex motion.
Which CSS properties are safe to animate for performance?
For smooth, GPU-accelerated animations, animate only transform (translate, scale, rotate) and opacity. These properties are composited on the GPU and do not trigger layout recalculation. Animating width, height, top, left, or background-color causes layout thrashing and janky animations.
What is animation-fill-mode and when do I need it?
fill-mode controls what styles apply before (backwards) and after (forwards) an animation plays. forwards keeps the animation's final state after it completes — without it, the element snaps back to its original state. Use animation-fill-mode: both for most animations that should leave the element in its animated state.
Do CSS animations work without JavaScript?
Yes — CSS animations are entirely declarative and require no JavaScript. They run on the CSS animation engine, which is typically GPU-accelerated and runs even when JavaScript is disabled or blocked.

CSS Animation Browser Support

CSS animations using @keyframes and the animation property are supported in all modern browsers including Chrome 43+, Firefox 16+, Safari 9+, and Edge 12+. No vendor prefixes are required for modern browsers. IE 10 and 11 support CSS animations but with some limitations. All animations generated by this tool produce standard, prefix-free CSS.

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