How does this CSS selector playground test selectors?

The tool renders your custom HTML inside an isolated DOM container and executes document.querySelectorAll(selector), dynamically applying visual highlight outlines to matching elements.

Can I test complex combinators like nth-child and sibling selectors?

Yes. All standard CSS selectors (descendant, child >, adjacent sibling +, general sibling ~, :nth-child(), :not(), and attribute selectors) are supported.

CSS Selector Playground & Matcher

Test and debug CSS selectors against your custom HTML. Highlights matching DOM elements in real-time, inspects element paths, and checks querySelectorAll offline.

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HTML MARKUP INPUT 0 lines

LIVE RENDERED PREVIEW (WITH HIGHLIGHTS) DOM Tree

Frequently Asked Questions

How do I write a selector for direct child elements only?

Use the child combinator > (e.g. ul.nav > li). This matches only <li> elements that are direct children of ul.nav, ignoring grandchildren inside nested sub-menus.

Is my HTML code safe?

Yes. The entire playground executes locally inside your web browser. No HTML markup or selector queries are sent over the network.