Creating smooth, natural animations can make a website feel faster, more responsive, and more professional. Our Cubic Bezier Editor helps you design custom CSS easing curves visually, preview animation behavior in real time, and generate ready-to-use CSS code instantly. Whether you’re building button hover effects, navigation menus, modal windows, or advanced UI interactions, this tool gives you complete control over animation timing.
A Cubic Bezier Editor is a visual tool used to create custom CSS easing functions. Instead of relying on standard timing functions such as ease, ease-in, or linear, you can design your own animation curve using draggable control points.
In CSS, easing functions determine how an animation progresses over time. A custom cubic Bezier curve allows you to control acceleration, deceleration, and motion flow more precisely, helping you create smoother and more engaging user experiences.
Developers and designers often use custom easing curves to make interfaces feel more natural and responsive.
Creating a custom animation curve is simple.
Step 1: Adjust the Control Points
Use the editor’s draggable handles to modify the curve. Moving the handles changes how the animation accelerates and slows down.
Step 2: Preview the Animation
Watch the live preview update instantly. This helps you understand how the curve affects motion before applying it to your project.
Step 3: Review the Generated CSS
As you adjust the curve, the tool automatically generates the corresponding cubic-bezier() value.
Step 4: Copy and Use the Code
Copy the generated CSS and paste it into your stylesheet.
Example:
.button {
transition: all 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
}
Your animation will immediately follow the custom timing curve you created.
Every cubic Bezier curve consists of four points.
Start Point
The curve always begins at:
(0,0)
This represents the start of the animation.
End Point
The curve always ends at:
(1,1)
This represents the completion of the animation.
First Control Point
The first control point influences how quickly the animation begins.
Second Control Point
The second control point controls how the animation approaches its end state.
Together, these points determine the overall motion behavior.
For example:
cubic-bezier(0.42, 0, 1, 1)
creates a gradual start and a faster finish, commonly known as an Ease In effect.
Behind the visual editor is a mathematical formula used to calculate the curve.
B(t)=(1−t)3P0+3(1−t)2tP1+3(1−t)t2P2+t3P3B(t)=(1-t)^3P_0+3(1-t)^2tP_1+3(1-t)t^2P_2+t^3P_3B(t)=(1−t)3P0+3(1−t)2tP1+3(1−t)t2P2+t3P3
Where:
Most users never need to calculate this manually. The Cubic Bezier Editor handles the math automatically and allows you to focus on creating the desired animation behavior visually.
The following presets are built into CSS and are frequently used in web design.
Preset | Cubic Bezier Value | Best Use Case |
Linear | cubic-bezier(0,0,1,1) | Constant speed animations |
Ease | cubic-bezier(0.25,0.1,0.25,1) | General UI transitions |
Ease In | cubic-bezier(0.42,0,1,1) | Elements entering the screen |
Ease Out | cubic-bezier(0,0,0.58,1) | Elements exiting the screen |
Ease In Out | cubic-bezier(0.42,0,0.58,1) | Smooth start and finish |
These presets provide excellent starting points when designing custom motion curves.
Different interactions benefit from different easing styles.
Button Hover Effects
Fast, subtle transitions improve responsiveness.
Recommended:
cubic-bezier(0.25,0.1,0.25,1)
Modal Animations
Modals should feel smooth and controlled.
Recommended:
cubic-bezier(0.16,1,0.3,1)
Navigation Menus
Navigation elements should move naturally without feeling sluggish.
Recommended:
cubic-bezier(0.4,0,0.2,1)
Mobile Interactions
Touch-based interfaces benefit from quick acceleration and gentle deceleration.
Recommended:
cubic-bezier(0.22,1,0.36,1)
Micro-Interactions
Small UI details such as toggles and notifications feel more polished when using carefully tuned easing curves.
Button Hover Animation
.button {
transition: transform 0.25s cubic-bezier(0.25,0.1,0.25,1);
}
.button:hover {
transform: scale(1.05);
}
This creates a smooth hover effect that feels responsive without being distracting.
Modal Window Animation
.modal {
animation: openModal 0.4s cubic-bezier(0.16,1,0.3,1);
}
The modal enters naturally and avoids abrupt motion.
Sidebar Navigation Animation
.sidebar {
transition: transform 0.35s cubic-bezier(0.4,0,0.2,1);
}
This timing curve is commonly used in modern navigation systems.
Accordion Expansion Animation
.accordion {
transition: height 0.3s cubic-bezier(0.4,0,0.2,1);
}
The content expands smoothly without appearing slow.
Loading Animation
.loader {
animation: pulse 1s infinite cubic-bezier(0.68,-0.6,0.32,1.6);
}
This creates a dynamic bounce-like effect that attracts attention.
Not every project requires a custom easing curve.
Feature | Cubic Bezier | Ease | Linear |
Customization | High | Low | Low |
Flexibility | Excellent | Limited | Limited |
Ease of Use | Moderate | Easy | Easy |
Motion Quality | Excellent | Good | Basic |
Best For | Custom UI animations | General transitions | Constant-speed effects |
If you need complete control over animation behavior, cubic Bezier curves are the best option.
Using Extreme Control Points
Extreme values can make animations feel unnatural and difficult to follow.
Excessive Bounce Effects
Bounce animations should be used sparingly. Overusing them can make interfaces feel unprofessional.
Slow UI Animations
Long animation durations often create a sluggish user experience.
Ignoring Accessibility
Some users prefer reduced motion. Always consider accessibility settings when designing animations.
Match Motion to User Expectations
Animations should reinforce user actions, not surprise users.
Maintain Consistency
Use similar easing curves throughout your interface to create a cohesive experience.
Improve Perceived Performance
Well-designed motion can make interactions feel faster, even when loading times remain unchanged.
Test on Multiple Devices
Animations may feel different on desktops, tablets, and mobile devices. Always test your designs across screen sizes.
Start with Presets
Built-in easing functions provide excellent foundations for creating custom curves.
Cubic Bezier functions can be used with several CSS properties.
transition-timing-function
.box {
transition-timing-function: cubic-bezier(0.4,0,0.2,1);
}
animation-timing-function
.box {
animation-timing-function: cubic-bezier(0.25,0.1,0.25,1);
}
CSS Transition Example
.card {
transition: transform 0.3s cubic-bezier(0.4,0,0.2,1);
}
CSS Animation Example
.spinner {
animation: spin 1s infinite cubic-bezier(0.25,0.1,0.25,1);
}
These properties give developers precise control over motion design and interaction timing.
To create even more advanced UI elements, you may also find these tools useful:
These tools work together to help you build modern, responsive interfaces faster.
Custom easing curves can dramatically improve the feel of a user interface. Instead of relying solely on default CSS timing functions, a Cubic Bezier Editor allows you to create motion that matches your design goals and user expectations. By experimenting with different control points, testing real-world interactions, and using proven motion design principles, you can build smoother, more engaging animations that make your websites and applications feel more polished and professional.
A Cubic Bezier Editor is a visual tool that helps users create custom CSS easing functions and animation timing curves.
The cubic-bezier() function controls how an animation accelerates and decelerates over its duration.
You can use it with transition-timing-function and animation-timing-function properties.
The four parameters represent two control points that define the shape of the animation curve.
Ease is a predefined timing function, while cubic Bezier allows complete customization of animation behavior.
Yes. Negative values can create overshoot and bounce-like effects.
There is no universal best curve. The ideal choice depends on the type of interaction and desired user experience.
Yes. Modern browsers fully support CSS cubic Bezier timing functions.