W3c Standard Validator
W3C Validation Standards
We validate the code we write based on the definitions of the World Wide Web Consortium (W3C).
Validation is a process of checking your documents against a formal Standard, such as those published by the World Wide Web Consortium (W3C) for HTML and XML-derived Web document types. It’s provide a similar purpose to spell checking and proofreading for grammar and syntax, but is much more precise and reliable than any of those processes because it is dealing with precisely-specified machine languages, not with nebulously-defined human natural language.
If you would like to make your web pages usable by everyone, we feel it is important that you emphasize standards compliance. By complying with existing standards, rather than relying upon browser specific extensions and hacks, you can make sure that the web sites you design will be readable by all browsers.
There are many excellent sources on the Internet to validate web page code. Some are available for download and are platform specific, while others have web based interfaces, such as:
- W3C HTML Validation Service
- CSS Check, a Cascading Style Sheets Lint