π Bezier Curve Editor
β‘ Live Preview
π» CSS Code
transition-timing-function: cubic-bezier(0.25, 0.1, 0.25, 1);
This CSS Cubic-Bezier easing generator is a visual animation curve editing tool that helps front-end developers quickly debug and generate perfect CSS animation easing effects. Here is a detailed usage guide:
In the curve editor on the left, you will see two draggable control points (cyan dots). Dragging these points adjusts the Cubic-Bezier curve shape in real time. The x-axis represents time progress, and the y-axis represents property value progress. As you drag the control points, the numeric input boxes and sliders below update synchronously for precise adjustment.
The tool includes multiple commonly used easing function presets, including CSS standard presets (linear, ease, ease-in, ease-out, ease-in-out) and classic animation presets (such as spring bounce effect). Click a preset button to quickly apply the corresponding curve parameters, saving you from manual adjustment.
Click the "Play Animation" button to see the block in the preview area on the right move according to the current curve. Enable "Loop" mode to make the animation play repeatedly, so you can observe the effect until you find the most satisfying easing curve.
After adjusting the curve, the tool automatically generates the corresponding CSS code (transition-timing-function format). Click "Copy CSS" to copy the code to the clipboard and paste it directly into your project. Click "Toggle Format" to switch between different CSS syntax styles.
When control point x-values go outside the 0-1 range, you can create bounce-back effects. y-values outside 0-1 create overshoot effects. These are useful in specific scenarios but require caution. Always test compatibility on your target browsers before using in production.
• Web Animation Optimization: Add natural transition animations to interactive elements like button hovers, menu expands, and modal appearances to enhance user experience.
• CSS Animation Debugging: When developing complex CSS animations, quickly find the right easing curve through a visual interface, reducing time spent on trial-and-error CSS modifications.
• Design Collaboration: Designers can parameterize animation effects and communicate precise Cubic-Bezier values to developers, ensuring accurate design implementation.
• Learning & Teaching: Help beginners intuitively understand how easing functions work by dragging control points and observing the relationship between curve changes and animation effects.
• Animation Library Integration: When configuring custom easing functions for GSAP, Framer Motion, and other animation libraries, preview effects with this tool first, then convert to the corresponding library API parameters.
The Cubic-Bezier curve is one of the fundamental curves in computer graphics, defined by four control points P0, P1, P2, and P3. P0 is fixed at (0,0) and P3 at (1,1); P1 and P2 are the two points you drag in the editor. The curve equation is: B(t) = (1-t)^3*P0 + 3(1-t)^2*t*P1 + 3(1-t)*t^2*P2 + t^3*P3, where t ∈ [0,1].
In CSS, easing functions can be applied to two properties: transition-timing-function for transition effects (when element state changes), and animation-timing-function for keyframe animations (sequences defined by @keyframes). The Cubic-Bezier values generated by this tool work for both scenarios.
In CSS animations, prefer transform and opacity properties because browsers can GPU-accelerate them. Avoid animating width, height, top, and left, which trigger reflows. Also, complex Cubic-Bezier curves may increase computational overhead and cause frame drops on low-end devices.
A Cubic-Bezier easing function is a mathematical curve used to define the rate of change of a CSS animation property over time. It is defined by four control points (x1, y1, x2, y2). By adjusting these points, you can create animation effects ranging from linear to complex rhythms.
In a Cubic-Bezier curve, the x-axis represents time progress (0 to 1), and the y-axis represents the progress of the property value change (0 to 1). By adjusting the control points, you can control acceleration or deceleration at different points in the animation.
CSS includes linear, ease (default), ease-in (accelerate), ease-out (decelerate), and ease-in-out (accelerate then decelerate) easing functions. These can all be represented as Cubic-Bezier values: linear is cubic-bezier(0,0,1,1), ease is cubic-bezier(0.25,0.1,0.25,1), ease-in is cubic-bezier(0.42,0,1,1), ease-out is cubic-bezier(0,0,0.58,1), and ease-in-out is cubic-bezier(0.42,0,0.58,1).
Yes. When x1 or x2 goes outside the 0-1 range, it can create bounce-back or overshoot effects. However, be aware that values outside this range may cause the animation to move backwards at certain points, so use them with caution.
Yes. This tool is responsive and works on mobile browsers. You can drag control points by touch, but due to screen size limitations, we recommend using a tablet or desktop browser for the best experience.
Cubic-Bezier easing functions are well supported in modern browsers (Chrome 4+, Firefox 4+, Safari 3.1+, Edge 12+). On older browsers, you may need to add a -webkit- prefix.
Most modern animation libraries support Cubic-Bezier easing functions. In GSAP, you can use ease: "cubic-bezier(0.25, 0.1, 0.25, 1)" or ease: CustomEase.create("custom", "0.25, 0.1, 0.25, 1").
Cubic-Bezier only defines the time-value relationship. The natural feel of an animation also depends on duration, element size, and movement distance. We recommend adjusting these parameters in your actual project in combination with the easing curve.