This is a HTML, CSS, and PHP validator.
Search engines expect that there will be no broken links, broken redirects, bad grammar, or misspelled words. When you have such problems, the search engines may consider the site to be of low quality and consequently, your rankings will be downgraded. This tool will ensure that you do not get penalized because of bad HTML. Besides a consistent document object model, the validator will also ensure your code can continue into future without problems. Future versions of the standards always maintain backward compatibility with older version of the it. When including dynamic pages on your website, you will be able to ensure the HTML and CSS produced are standards compatible. When checking with the validator, you are provided meaningful error messages that help fix the problems. With a simple and intuitive interface, this is a very good product.