I really hate to present a negative review. However, I really find it redundant to use a plugin like Validation Helper, which checks how valid your page’s code is after performing a conversion from XHTML to HTML.
One thing I like to point out is that despite it being a plugin with good intentions, it really is not necessary. Anyone can go to the W3 Validator and do a detailed check on their website. It is unnecessary to install and use this plugin as it is an unnecessary process that your site will have to go through.
The plugin only shows the number of errors. It does not go through and give a detailed report. For those who have been working on their site and articles, it becomes a little difficult to pick out what exactly is going on. It might be a missing piece of code, an extra space, or even a mistake in typing.
The W3 validator is a great tool. Even though it is off-site from your WordPress admin panel, it should be bookmarked and used. So, save yourself some unnecessary processes, disk space, and even some time. As a note, the other validators available in the WordPress plugin directory are not too much different from this one.
What do you think? Necessary/ Unnecessary? Needs more features?
Yes, Nile you are right. Installing too many and unnecessary plugins can affect your website speed as well as waste important time. For validation purpose, w3 validate is good.