While all three views can be useful when developing Web applications, you're likely to use Code view most often, because application development usually involves more work with code than with design.
Dreamweaver lets you do all your code work by hand or automate coding tasks with Dreamweaver's code tools.
It may be found at: https://validator.w3.org/ A CSS validator checks your Cascading Style Sheet in the same manner.
That is, it will check that it complies with the CSS standards set by the W3 Consortium.
However, there are compelling reasons why you should make every effort to learn HTML- and CSS-valid standards, and comply with them.
It's There's a W3C validator for mobile devices as well.
The W3 Consortium has its own online validator which you can use for free.by Christopher Heng, Whether you design your web page using a visual web editor like Expression Web, Dreamweaver or Blue Griffon, or you code HTML directly with a simple text editor, the generally recommended practice is to validate it after you finish designing it.This article discusses what validation means, points you to some of the free tools that you can use, and deals with its limitations and the problems that a new webmaster may face. Otherwise you'll be completely lost here since I assume you at least know what these terms mean.That also means that it will be accessible to more people, across more web browsers and operation systems.Having an accessible website is also regarded as good web design practice.