CSS Details Marker Generator
Targets summary and summary::marker, then adds spacing and color rules around the native disclosure control.
What the CSS Details Marker does
Targets summary and summary::marker, then adds spacing and color rules around the native disclosure control. 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: The generated CSS includes a marker mode that can hide the native marker so you can use your own symbol or layout.
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 Details Marker do?
Targets summary and summary::marker, then adds spacing and color rules around the native disclosure control.
What should I keep in mind?
The generated CSS includes a marker mode that can hide the native marker so you can use your own symbol or layout
Does it upload my input?
No. The CSS Details Marker 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.