CSS Selector Tester - Test Selectors Online

Free online CSS selector testing tool. Test CSS selectors against HTML markup and see matched elements.

HTML Input

CSS Selector

Try: p,.intro,li:nth-child(2)

Test results will appear here...

Common CSS Selectors Reference

Basic Selectors

element - Element by tag

.class - By class name

#id - By ID

[attr] - By attribute

Combinators

A B - Descendant

A > B - Child

A + B - Adjacent sibling

A ~ B - General sibling

Pseudo-classes

:first-child

:last-child

:nth-child(n)

:not(selector)

Attribute Selectors

[attr=value] - Exact

[attr*=value] - Contains

[attr^=value] - Starts with

[attr$=value] - Ends with

CSS Selector Tester Online

Test CSS selectors against HTML markup. See matched element count, content preview, and use quick selector examples.

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How to Use CSS Selector Tester

Enter your input or configuration in the CSS Selector Tester
Set up test parameters and options as needed
Click Test or Run to execute the test
Review the results and output details

Common Use Cases

Testing CSS selectors against sample HTML markup
Learning CSS selector syntax with instant feedback
Debugging CSS selectors that aren't matching elements
Validating complex CSS selectors before deployment

Frequently Asked Questions

Is CSS Selector Tester free to use?

Yes, CSS Selector Tester is completely free with no signup required. You can use it as many times as you need.

Is my data safe when using CSS Selector Tester?

Absolutely. All processing happens directly in your browser. Your data is never sent to any server or stored anywhere.

Do I need to install anything?

No installation is needed. CSS Selector Tester runs entirely in your browser and is ready to use immediately.

Can I save or share test results?

You can copy the results from the output area. All testing happens locally in your browser for maximum privacy.

Are there any rate limits?

No, since processing happens in your browser, there are no rate limits or usage restrictions.