Validate HTML & CSS With Firefox
Making sure your pages validate is a snap with the Firefox Web Developer Toolbar Extension.
Many web development applications bundle in ways to check your page markup. Both Dreamweaver 8 and TopStyle Pro (tools I use daily) have this functionality built-in, or you can also use nifty online tools, like those at W3C:
If your web development tools don’t have built-in validators, or you’d like a second opinion, the Web Developer Toolbar offers an easy way to validate HTML and CSS (among many other things) from any page on the web.
To validate HTML or CSS
- Use Firefox to browse to the page you’d like to validate
- Click the Tools button in the Web Developer Toolbar
- Select the appropriate item (Validate HTML or Validate CSS).
The Toolbar will connect to the right validator at the W3C site and output your results automatically in a new tab.