Browser CSS Selector Test

This browser selector test will check how well your browser supports the CSS selectors from level 1 up to the upcoming level 4.

After you started the test-suit, it will automatically check which selectors are supported by your browser, not necessarily if your browser implemented it correctly according to the specification. Please note that the specification isn't finalized yet, so the CSS4 selectors support is increasing at the moment, the browser fabricators are constantly working on implementing new or changed parts of the specification.