We have already seen standalone HTML validator application to check for errors in HTML files. If love browsing and do it all in Firefox then you can use HTML Validator Firefox plugin. It shows number of errors and warning as an icon at the bottom right part of the Firefox window. You can
Validate & check HTML file errors with free Validator
HTML files can contain lot of tags in order to generate properly formatted text. Due to syntax complexity one can commit lot of mistakes while writing an HTML file resulting in error laden HTML webpage. You can easily check for syntax and other errors in HTML files and validate them