Validating a html web page
The errors reported are the same in virtually all cases. Watson is a free service to analyze your web page on the Internet.
Just give the URL of your page and Watson will get a copy of it directly from the web server.
This checker performs various tests on a Web Page to determine its level of mobile-friendliness.
The tests are defined in the mobile OK Basic Tests 1.0 specification.
So make it sure that you go through this post and run all the necessary tests on your website before making it live.
This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, Math ML, etc.
Just like a minor negligence while constructing a building can cost life of millions of residents , the same way a small error left unnoticed can prove to be fatal for your website.
Access Color will find the relevant color combination within your HTML and CSS documents rather than requiring you to find each value to input yourself in order to test the contrast between each color combination.
Rather than providing a complex technical report, WAVE shows the original web page with embedded icons and indicators that reveal the accessibility of that page.
HERA is a tool to check the accessibility of Web pages according to the specification Web Content Accessibility Guidelines.
This is the W3C Feed Validation Service, a free service that checks the syntax of Atom or RSS feeds.
You can validate by URL or Validate by direct input.