Question 1

How do I test a CSS selector online?

Accepted Answer

Paste your HTML into the input area or fetch it from a URL, then type your CSS selector in the selector field. Matched elements are highlighted instantly with a count of total matches.

Question 2

Can I test selectors against a live website?

Accepted Answer

Yes. Enter any URL and click Fetch to load the page's HTML. Then type your CSS selector to test it against the real page structure. The HTML is fetched server-side to avoid CORS restrictions.

Question 3

What CSS selectors are supported?

Accepted Answer

All standard CSS selectors are supported including element, class, ID, attribute, pseudo-class, and combinators (descendant, child, sibling). The tool uses the browser's native querySelectorAll engine.

Question 4

Is my HTML data sent to a server?

Accepted Answer

No. Selector matching happens entirely in your browser using the DOM API. Only the URL fetch feature makes a server request — pasted HTML never leaves your device.

Question 5

Can I export the matched elements?

Accepted Answer

Yes. Click the Export button to copy all matched elements' outer HTML to your clipboard, ready to paste into your code or documentation.

CSS Selector Tester

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