CSS HTML Validator

I started with the free version in the late 1990s and upgraded to the Pro version later on when I taught Web design regularly. I continue to recommend it to my students when I find out they are doing any kind of webpage development.

I use it to batch validate student websites. I share the generated reports with their grading rubric so they not only know what they did wrong, but how to fix it.

Based on more than two decades using CSS HTML Validator under Windows and, more recently, under Linux, I recommend it highly, not only to anyone learning web development, but also to experienced developers who pride themselves on clean, standard-compliant code, or whose code is subject to the accessibility requirements of WCAG and Section 508, or who need advanced capabilities for website monitoring. A test run of CSS HTML Validator is possible by taking advantage of the free trial offer.

It's helped me write robust HTML and CSS, and it's helped me learn the reason why certain things should be structured in the way that allows validation.

I am very impressed with CSS HTML Validator software. It is a powerful editing tool for HTML, XML, CSS and other forms of web documents. The validator saves a lot of time reviewing code for syntax, nesting errors, and other coding mistakes. You can choose the level of error reporting from critical errors only, or add warnings, link checking, and even suggestions on good style practices and appropriate coding for web crawlers. When validating documents, errors are highlighted in different colors, indicating the severity of the mistake. And the validator allows you to choose to validate with the HTML 5 standard or select earlier, transitional versions.

The Validator makes writing code quicker and easier than using a plain text editor. You can choose to have your tags auto-closed, and lines auto-indented to help avoid nesting errors. Spelling and syntax suggestions are available on-the-fly. The editing screen can be split horizontally or vertically between two documents allowing for quick and simple cut-and-paste, or side-by-side comparison of two documents, and the edit screen will hold multiple files open with quick-access tabs allowing you to switch rapidly between documents.

Although the Validator is not a WYSIWYG editor, it quickly allows you to check the web display of your document using either an internal browser, or your choice of popular browsers through an external link. The Validator constantly follows your cursor, so help from their on-line syntax database is on