CSS Selector Tester
Test a CSS selector against HTML and see how many elements match plus their markup, instantly and privately in your browser.
Runs entirely in your browser — nothing you enter is uploaded or stored.
CSS Selector Tester
Test a CSS selector against HTML and see how many elements match plus their markup, instantly and privately in your browser.
Paste your html on the left and the result is produced instantly — entirely in your browser. Your data never leaves the page, which you can confirm from the Network panel or our privacy policy.
Frequently asked questions
How do I use the CSS Selector Tester?
Paste or type your html on the left, set the options, and the matches appears on the right — copy or download it. Everything runs in your browser.
Is my data uploaded anywhere?
No. This tool runs entirely in your browser — your input is never sent to a server. You can verify it in the Network tab or in our Content-Security-Policy.
Is the CSS Selector Tester free?
Yes — completely free, no sign-up and no limits. Everything happens client-side.