🎬 CSS Keyframe Builder
Design CSS keyframe animations in seconds — set transform and opacity at each stop, preview the live animation, and copy the ready-to-paste @keyframes code. No install, no signup, runs entirely in your browser.
About
The CSS Keyframe Builder lets you craft @keyframes animations without writing a single line of code by hand. You define transform properties — translate (X and Y), scale, and rotate — plus opacity at three key stops: 0%, 50%, and 100%. Animation duration, a timing function (ease, linear, ease-in, ease-out, ease-in-out, or a custom cubic-bezier), and repeat count (finite or infinite) are all configurable in the panel. A live animated preview updates instantly so you can tune values until the motion feels right. When ready, click Copy and the complete @keyframes block — including the animation shorthand — is placed on your clipboard and ready to paste into your stylesheet. Everything runs in the browser with no files uploaded and no data sent anywhere.
How to use
- Set the transform values — translate X/Y, scale, and rotate — and opacity for the 0% stop (the start of the animation).
- Adjust the 50% stop values to define the midpoint of the motion, or leave them at default to create a simple two-state transition.
- Set the 100% stop values for the end state, then configure duration (in seconds), timing function, and repeat count.
- Watch the live preview update in real time and fine-tune any value until the animation looks exactly right.
- Click Copy CSS to copy the full @keyframes block and animation property to your clipboard, then paste it directly into your stylesheet.
FAQ
- Which transform properties can I animate?
- You can animate translateX, translateY, scale, and rotate, plus opacity. Each property is set independently at the 0%, 50%, and 100% keyframe stops.
- What timing functions are available?
- The builder includes ease, linear, ease-in, ease-out, and ease-in-out presets, plus a custom cubic-bezier option so you can craft a unique acceleration curve.
- Can I make the animation loop forever?
- Yes. Set the repeat count to Infinite and the generated CSS will use animation-iteration-count: infinite, making the animation loop continuously.
- Do I need to know CSS to use this tool?
- No. The builder is fully visual — just move sliders and pick values from dropdowns. The CSS is generated for you automatically and is ready to copy into any project.
- Is the generated CSS compatible with all modern browsers?
- Yes. The output uses standard @keyframes and the animation shorthand property, which are supported in all modern browsers including Chrome, Firefox, Safari, and Edge without any vendor prefixes.