Zvon.org contains references for many XML‐related standards, including XHTML, MathML, XSLT, CSS, and SVG. The references contain functional examples, which could also be used as compliance tests.
An outstanding HTML and CSS test suite, with a database of results in different browsers. Includes torture tests for fine points like collapsing empty paragraphs, underline color different from text color, and setting styles on
Pete’s suite tests support for advanced HTML, XHTML, and XML markup, PNG images, integrated MathML and SVG, and useful Unicode typesetting, technical, and mathematical characters.
This downloadable automated performance test suite includes HTML 4.0, HTML 3.2, XML with CSS, and XML with XSL compliance tests, as well as tests for audio, video, and 3D file types.
Stress tests designed to push Mozilla’s endurance. Loads lists of pages for as long as the browser continues to run.
Includes a suite of test pages covering the full range of Unicode 3.2 characters, and a information about Unicode support in fonts, Web browsers, and other software.
Table of browser support for various character entities.
Test suite for the various features of HTML 4.0’s
<object> element, using many different content types.
Test for character entities.
Brief tests demonstrating iCab support of several HTML 4.0 features.
Since HTML is an application of SGML, HTML Web browsers technically should support SGML features like tag minimization (
officially dead site tests this and other features of SGML syntax.
A simple page I made to test XHTML Basic served with various content types.
Demonstrations and tests of various WML features.
Official test suites by the CSS working group. The CSS level 1 test suite is comprehensive. There are also tests for Mobile Profile 1.0 and CSS level 3 selectors.
Prototype of an official CSS level 2 test suite for the W3C.
Detailed tests covering much of CSS level 2.
The Web site for his book, CSS 2: Feuilles de styles HTML, contains a CSS level 2 test suite, in French.
tough but fair composite test of the CSS‐1 box model as applied to HTML 4.0.
Downloadable set of 800 ECMAScript tests of DOM level 1 support, including the Fundamental, Extended and HTML features.
Documentation of elements and attributes from HTML 2.0 through XHTML 1.1 (and proprietary ones too), with tables listing what versions of Internet Explorer, Mosaic, Netscape, and Opera support them.
Yucca’s articles about Web authoring are recommended reading. The articles elsewhere on the Web that he recommends are also worthwhile.
Review of browsers that choose between quirky and more standards‐compliant modes based on the
<!DOCTYPE> declaration of a Web page, listing many other resources on the subject.
Extensive list of documents related to the use of the underused
<link> element. In English and German.
Mark’s weblog Dive Into Mark posted an essay about
<object>, which linked to my object test page with the annotation,
This shows just how incredibly broken IE/Win’s OBJECT handling is. Over the next few days, other Web development blogs mentioned the story and also linked to my page. The cumulative effect was a surprising surge of hits to the object test page in particular and my test suite in general.