CSS Keyframe GeneratorBuild custom CSS @keyframes animations step by step with a visual editor.

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CSS Keyframe Generator

Build custom CSS @keyframes animations step by step with a visual editor.

How to Use

Define keyframe steps

Add percentage-based steps and write CSS properties for each stage.

Customize timing

Set the animation name, duration, and timing function.

Copy the code

Preview the animation and copy the complete @keyframes and animation CSS.

What Is CSS Keyframe Generator?

The CSS Keyframe Generator is a step-by-step editor for building custom @keyframes animations. Unlike preset animation tools, this generator gives you full control over every animation stage. You can add any number of keyframe steps at specific percentages, write custom CSS properties for each step, and see the animation play in real-time. Each step has a percentage field (0% to 100%) and a CSS properties textarea where you can write any valid CSS declarations. Steps are automatically sorted by percentage. The tool generates complete @keyframes rules with proper formatting, along with the animation property declaration. This is ideal for creating unique, custom animations that go beyond standard presets.

Why Use Our CSS Keyframe Generator?

Full control over every keyframe stage and CSS property
Add unlimited keyframe steps at any percentage
Steps automatically sorted and formatted properly
Live preview shows the animation as you build it

Common Use Cases

Custom Entrance Effects

Design unique entrance animations with precise stage control.

Complex Motion Paths

Build multi-stage animations with different transforms at each step.

Loading Animations

Create custom loading indicators with exact timing control.

Brand Animations

Design signature brand animations with precise keyframe control.

Technical Guide

CSS @keyframes define animation stages using percentage selectors or from/to keywords. Each percentage block contains CSS properties that define the element state at that point in the animation timeline. The browser interpolates values between keyframes for smooth transitions. Not all properties can be interpolated—discrete properties like display switch instantly at the keyframe percentage. Common animatable properties include transform, opacity, color, background-color, width, height, and margin. For smooth animations, use transform for positioning (translate) rather than top/left, and opacity for visibility rather than display. The animation shorthand property references the @keyframes name and specifies timing parameters. Multiple animations can be applied to one element using comma-separated values.

Tips & Best Practices

1
Use 0% and 100% keyframes to define the start and end states explicitly
2
Add steps at irregular percentages for natural, organic motion
3
Animate transform and opacity for the best performance
4
Test with different timing functions to find the best feel

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Frequently Asked Questions

QHow many keyframe steps can I add?

You can add as many steps as needed. The minimum is two (start and end states).

QCan I write any CSS in keyframe steps?

Yes, any valid CSS property can be used in keyframes, though not all properties can be smoothly animated.

QWhat happens between keyframe steps?

The browser interpolates (transitions) between the values of adjacent keyframes automatically.

QDo I need both 0% and 100%?

If omitted, the browser uses the element's existing styles for the missing start or end state.

QCan I reuse keyframes for multiple elements?

Yes, define the @keyframes once and reference the animation name on any number of elements.

About CSS Keyframe Generator

CSS Keyframe Generator is a free online tool from FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration required. No ads. Just fast, reliable tools.