Features
Markup
Validate your HTML against the official HTML specification. Websites following the specification are awarded by Google and other search engines with higher rankings and ensures you, that your website renders in all modern browsers.
Styles
CSS (Cascading Style Sheet) code validators check that the web page style sheet coding is in compliance with CSS standards set by the W3C. Following the standard helps you supporting multiple browsers.
Accessibility
Testing for web accessibility (how usable a website is by individuals with disabilities) is an often neglected part of web design and development. Feel good about yourself and help people with disabilities browsing your site.
Performance
Validate your site against the acclaimed ruleset from Google. Good performance improves both search rankings, visits and convertions on your site.
Broken Links
Check HTML documents for broken links. Broken links looks unprofessionally and could be a potential reason for your customers to leave your site. With HippoValidator you are warned everytime a link is broken.
Spell Checker
Spell check your website and avoid those stupid typos. HippoValidator even provides you with suggestions for the words not parsing spell check.
Syndication
Validate RSS and/or Atom feeds referenced on your site. Making sure your feeds validate, ensures you that they can be parsed by most feed readers.