CSS Keyframes vs Transition
Understand when to use CSS @keyframes versus transition. Learn the strengths of each approach and choose the right tool for your animations.
Quick Comparison
| Feature | CSS Transition | CSS @keyframes |
|---|---|---|
| Trigger | State change (hover, click, class toggle) | Automatic or triggered |
| Keyframes | Only start and end states | Unlimited intermediate states (0% to 100%) |
| Looping | Not supported natively | Supported with animation-iteration-count |
| Direction | Forward only (A → B) | Forward, reverse, or alternate |
| Pause/Resume | Not directly supported | animation-play-state property |
When to Use CSS Transition?
Use CSS transitions for simple state changes triggered by user interaction:
- Hover effects (buttons, links, cards)
- Focus states (form inputs)
- Toggle animations (accordions, menus)
- Simple A-to-B property changes
- Smooth state transitions
/* Transition example */
.button {
background: blue;
transition: background 0.3s ease;
}
.button:hover {
background: darkblue;
}
When to Use CSS @keyframes?
Use CSS keyframe animations for complex, multi-state animations:
- Loading spinners and indicators
- Bouncing or pulsing effects
- Complex entrance/exit animations
- Continuous background animations
- Path-based motion
- Anything requiring more than 2 states
/* Keyframe animation example */
@keyframes bounce {
0%, 100% { transform: translateY(0); }
50% { transform: translateY(-20px); }
}
.bouncing-element {
animation: bounce 1s ease infinite;
}
CSS Transition to Animation Conversion
Sometimes you start with a transition but need to convert it to a keyframe animation. Common reasons include:
- Need to add intermediate states or delays
- Want to loop the animation automatically
- Need precise control over timing at specific percentages
- Want to animate on page load without user interaction
- Need to reverse or alternate the animation direction
Our CSS Animation Generator makes this conversion easy. Input your transition values, set the steps, and get clean @keyframes code instantly.
Performance Considerations
Both transitions and animations perform well when used correctly. Optimize by animating only these properties:
These properties don't trigger layout or paint operations, making them GPU-accelerated and smooth at 60fps.
Convert Your Transitions to Keyframes
Ready to convert your CSS transitions to @keyframes? Our free tool generates clean code with visual easing curve editor.
Try the CSS Animation Generator