Running Validation & Accessibility Tests

What the Testing Does

W3C Validator

• checks the syntax and "vocabulary" of your HTML against the standard
• catches code problems that may make some assistive technology stumble.
• Before a page can be tested, it must be on the web server. Contribute users can test a page before publishing it by testing a Preview version. Then use the Accessibility Toolbar (see below), or copy its web address (URL) into the form on the W3C Validator page (http://validator.w3.org/), and click the Check button.

Save Time: Use the Web Accessibility Toolbar

The Web Accessibility Toolbar (for Internet Explorer) and the Web Developer Toolbar (for Firefox) contain links to the W3C validator.

• Select Validate > W3C HTML Validator > Validate HTML or Validate HTML [new window] to test the validity of your page's code.

Viewing the Results

• Viewing the W3C Validator Results Page