page_title: Acid2
section_title: Compliant applications
hierarchical_section_title: Acid2 / Compliant applications
caption_attribution_description: English: The Acid2 test, rendered in Safari 2.0.3.
context_page_description: Acid2 is a webpage that test web browsers' functionality in displaying aspects of HTML markup, CSS 2.1 styling, PNG images, and data URIs. The test page was released on 13 April 2005 by the Web Standards Project. The Acid2 test page will be displayed correctly in any application that follows the World Wide Web Consortium and Internet Engineering Task Force specifications for these technologies. These specifications are known as web standards because they describe how technologies used on the web are expected to function.
  The Acid2 tests rendering flaws in web browsers and other applications that render HTML. Named after the acid test for gold, it was developed in the spirit of Acid1, a relatively narrow test of compliance with the Cascading Style Sheets 1.0 standard. As with Acid1, an application passes the test if the way it displays the test page matches a reference image.
  Acid2 was designed with Microsoft Internet Explorer particularly in mind. The creators of Acid2 were dismayed that Internet Explorer did not follow web standards. It was prone to display web pages differently from other browsers, causing web developers to spend time tweaking their web pages.
context_section_description: If rendered correctly, Acid2 will appear as a smiley face below the text "Hello World!" in the user's browser, with the nose turning blue when the mouse cursor hovers over it. At the time of the test's release, every browser failed it, but now a number of browsers pass it. See the list below.
caption: Acid2 as rendered by compliant applications
exif: {}