What is a CSS transition?

A CSS transition smoothly animates a property change over a set duration. You define which property changes, how long it takes, and how the change accelerates or decelerates using a timing function. Transitions are perfect for hover effects, state changes, and subtle UI polish.

Which CSS properties can be transitioned?

You can transition any property that has interpolatable values — numeric or color values such as opacity, transform, color, background-color, border-radius, box-shadow, width, height, and more. Properties like display or visibility that jump between discrete states cannot be transitioned.

What do the timing functions mean?

Timing functions control the speed curve of the transition. `linear` moves at a constant rate. `ease` starts fast and slows down. `ease-in` starts slowly. `ease-out` ends slowly. `ease-in-out` is slow at both ends. `cubic-bezier()` lets you define a completely custom curve.

Do I need vendor prefixes for CSS transitions?

No. CSS transitions are fully supported in all modern browsers without any vendor prefixes (-webkit-, -moz-, etc.). The CSS generated by this tool is clean and standards-compliant.

Is this tool free and private?

Yes — completely free, no login required, and 100% client-side. Nothing is sent to any server. All processing happens right in your browser.

Free CSS Tool — No login required

Build CSS Transitions
Visually, Instantly

Pick a property, set duration and delay, choose your timing function, and watch the live preview. Copy production-ready CSS with one click.

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Live Preview

See your transition animate in real-time as you tweak every setting — no refresh needed.

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Copy-Ready CSS

Get clean, valid CSS transition code ready to paste into any stylesheet instantly.

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Full Control

Adjust property, duration, delay, and timing function including a custom cubic-bezier curve.

CSS Property

Duration400ms

50ms3000ms

Delay0ms

0ms2000ms

Timing Function

Generated CSS

.element {
  /* initial state */
}

.element:hover,
.element.active {
  transition: opacity 400ms ease 0ms;
}

Shorthand

transition: opacity 400ms ease 0ms;

Frequently Asked Questions

Everything you need to know about CSS Transition Generator.

Build CSS TransitionsVisually, Instantly

Live Preview

Copy-Ready CSS

Full Control

Frequently Asked Questions

Build CSS Transitions
Visually, Instantly