Acid2 Browser Test

Acid2 is a test page, written to help browser vendors ensure proper support for web standards in their products. Please take the Acid2 test!

If you’d like more in-depth information about the Acid2 test, we’ve provided a detailed technical guide that explains how the test works.

Note: Some 827 people (rough estimate, contents may have settled during shipping) have written to point out that the CSS used in the test is invalid. This is deliberate, as a means of exposing the ability of user agents to handle invalid CSS properly.

Note: When taking the test, you should use the default settings of the browser you are testing. Changing the zoom level, minimum font size, applying a fit-to-width algorithm, or making other changes may alter the rendition of the Acid2 page without this constituting a failure in compliance. (Added 21 July 2006)