CSS Focus Within Preview
Preview :focus-within styles for form groups, search boxes, and composite controls.
What the CSS Focus Within does
Preview :focus-within styles for form groups, search boxes, and composite controls. A search wrapper can highlight its border while the input or clear button has focus Adjust the controls and the preview updates immediately, so you can dial in exactly what you want and copy the result straight into your project — no build step and no account.
One thing to keep in mind: Focus-within follows actual focused descendants, so hidden controls can trigger styles too.
Private and in your browser
Everything runs locally in your browser. Your input is never uploaded, so the tool stays fast and works offline, and the copy and download buttons always use the current result shown in the output panel.
Frequently Asked Questions
What does the CSS Focus Within do?
Preview :focus-within styles for form groups, search boxes, and composite controls. A search wrapper can highlight its border while the input or clear button has focus.
What should I keep in mind?
Focus-within follows actual focused descendants, so hidden controls can trigger styles too
Does it upload my input?
No. The CSS Focus Within runs entirely in your browser — your input is never uploaded, and it keeps working offline once the page has loaded.
Practical utilities for front-end design and implementation work.