CSS Is Where Selector Comparer
Compare :is and :where selectors and their specificity impact.
What the CSS Is Where Selector Comparer does
Compare :is and :where selectors and their specificity impact. A reset can group button and input selectors with :where so it stays easy to override 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 selector list can match the same elements while carrying very different specificity.
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 Is Where Selector Comparer do?
Compare :is and :where selectors and their specificity impact. A reset can group button and input selectors with :where so it stays easy to override.
What should I keep in mind?
The selector list can match the same elements while carrying very different specificity
Does it upload my input?
No. The CSS Is Where Selector Comparer 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.