Question 1

What is a CSS selector tester?

Accepted Answer

A CSS selector tester lets you paste HTML markup and test CSS selectors against it in real-time. You can see which elements match, view specificity scores, and debug complex selectors before using them in production code.

Question 2

How does CSS specificity work?

Accepted Answer

CSS specificity is a scoring system with three components: IDs (a), classes/attributes/pseudo-classes (b), and type selectors/pseudo-elements (c). A selector like #main .title has specificity 1,1,0. Higher specificity wins when multiple rules conflict.

Question 3

Can I test multiple CSS selectors at once?

Accepted Answer

Yes, NexTool's CSS Selector Tester supports testing multiple selectors simultaneously. Click 'Add Selector' to add more rows. Each selector shows its own match count and specificity, and all matches are highlighted in the preview.

Question 4

Is this CSS selector tester free?

Accepted Answer

Yes, it is completely free with no signup required. The tool runs entirely in your browser for maximum privacy. No data is sent to any server.

Free CSS Selector Tester

Need something more powerful?

NexTool on GitHub