What is a cubic-bezier in CSS?

A cubic-bezier function defines a cubic Bezier curve that models the speed of an animation over time. It takes four values: x1, y1, x2, y2, which represent the coordinates of the two control points that define the curve. The curve starts at (0,0) and ends at (1,1).

Why uses cubic-bezier instead of standard keywords?

Standard keywords like `ease`, `linear`, and `ease-in` are limited to specific pre-defined curves. `cubic-bezier` gives you infinite control over the acceleration and deceleration of your animations, allowing for custom effects like bouncing or elastic motion.

Can the Y values go outside the 0-1 range?

Yes! While the X values (time) must be between 0 and 1, the Y values (progression) can go below 0 or above 1. This creation of "overshoot" allows for bouncing or elastic effects where the animation goes past its target and comes back.

Is this supported in all browsers?

Yes, the `cubic-bezier()` function is a standard CSS feature supported by all modern browsers (Chrome, Firefox, Safari, Edge) and has been for many years.

Cubic Bezier Generator

Cubic Bezier Generator Overview

Visual cubic-bezier easing generator

The CSS Cubic Bezier Generator is an advanced visual tool designed to help developers and designers create custom timing functions for CSS transitions and animations. Standard easing functions like "ease", "linear", or "ease-in-out" often fall short when you need a specific motion feel. This tool allows you to manipulate control points on a bezier curve graph to generate the exact `cubic-bezier(x1, y1, x2, y2)` values needed for your project. With real-time preview and one-click copy functionality, it streamlines the process of fine-tuning animations for a polished, professional user experience. Whether you need a bouncy effect, a quick snap, or a slow startup, this generator provides the visual feedback required to perfect your motion design.

How to Use Cubic Bezier Generator

Drag the two handle points (pink and green) on the graph to shape the bezier curve.
Select from presets like "Ease", "Linear", or "Ease-In-Out" to get a starting point.
Use the "Live Preview" section to see how your curve affects an animation compared to a linear reference.
Adjust the "Duration" slider to test the timing at different speeds.
Click the "Copy" button to copy the generated `cubic-bezier(...)` code to your clipboard.
Paste the code into your CSS `transition-timing-function` or `animation-timing-function` property.

Frequently Asked Questions

What is a cubic-bezier in CSS?: A cubic-bezier function defines a cubic Bezier curve that models the speed of an animation over time. It takes four values: x1, y1, x2, y2, which represent the coordinates of the two control points that define the curve. The curve starts at (0,0) and ends at (1,1).
Why uses cubic-bezier instead of standard keywords?: Standard keywords like `ease`, `linear`, and `ease-in` are limited to specific pre-defined curves. `cubic-bezier` gives you infinite control over the acceleration and deceleration of your animations, allowing for custom effects like bouncing or elastic motion.
Can the Y values go outside the 0-1 range?: Yes! While the X values (time) must be between 0 and 1, the Y values (progression) can go below 0 or above 1. This creation of "overshoot" allows for bouncing or elastic effects where the animation goes past its target and comes back.
Is this supported in all browsers?: Yes, the `cubic-bezier()` function is a standard CSS feature supported by all modern browsers (Chrome, Firefox, Safari, Edge) and has been for many years.

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