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W3C Validation Explained: How to Fix W3C Validation Error?

Compliance with W3C standards is essential if you want to protect your website from potential errors and insufficient traffic.

In this post, we are going to find out in detail why it is important to validate your site on W3C standards and how to go about it; however, before we do that, first things first! Let’s first understand what is W3C?

What is W3C Validation?

As you know W3C stands for World Wide Web Consortium

This global organization is an established body that shoulders the responsibility of creating and maintaining global web standards. The specifications rolled out by W3C serve as a direction for web designers and developers across the world. So, in other words, their word is no less than a gospel for web designers and developers in the world. 

Speaking of W3C validation, markup validation is an integral part of checking the quality of web pages. 

Below are listed a few benefits of W3C validation. 

Reasons for W3C Validation and CSS Analysis 

1. Following Best Web Design Practices 

W3C validation is advantageous as it encourages the best web development and coding practices to achieve error-free code. It helps beginners in particular as they are more prone to making W3C validation CSS errors. 

2. Better User-Experience 

Websites designed keeping W3C-compliant coding in mind facilitate a better browsing experience for the users. It not only improves the usability of the website but functionality too. 

By using W3C validators, you can rectify formatting errors and reduce the website’s size for enhanced efficiency and browsing experience. Here, you can read about 4 Common WordPress Theme And Plugin Errors, How to Fix Them

3. Compatibility With All Browsers

Website browser-friendliness is one of the key aspects of website design and development and that was one of the major reasons why W3C came into existence in the first place. 

Non-W3C-validated websites do not work on all web browsers with equal efficiency. In stark contrast, W3C-validated websites demonstrate excellent browser compatibility and work seamlessly on all of them. 

So, whether you use Firefox, Chrome, Safari, or Microsoft Edge; a validated website will work superlatively on all of them due to correct coding. 

4. Leads To Hassle-Free Coding And Maintenance

W3C validation leads to a hassle-free coding experience as you already have a set of standards to refer to. Besides, maintenance becomes easy as you can edit the code whenever necessary. Here acceptable validation criteria are W3C HTML validation, W3C XHTML validation, and W3C CSS validation. 

5. Multi-Device Accessibility 

Smartphone users have already outnumbered desktop users and the number of mobile users is increasing exponentially as you read this. So, how is it connected to W3C validators or validation? 

The fact stated above clearly implies that website owners cannot ignore mobile-friendliness while designing and developing websites. Being ignorant here would simply result in a bad user experience and poor rankings. Multi-device accessibility is the need of the hour and if you do not want to be left far behind in the competition, you got to keep W3C validation in mind. 

6. Used As Debugging Tool 

W3C validators are immensely helpful as they ease your burden of finding out coding errors. They tell you exactly where the problem lies and saves you from unnecessary problems such as display issues. 

So, now that you understand the importance of validation on W3, let’s take a look at a few ways of validating the code and also W3C validators. You might like to read about Debugging and Fixing 503 Service Unavailable Error in WordPress Made Simple

W3C Validators and Tips for Validating The Code 

There are two W3C validation tools. 

  • CSS validator
  • HTML validator

– CSS Validator Explained 

W3C validation of CSS is aimed at checking the validity of your website’s CSS of web documents in terms of HTML and XHTML to name a few. 

The good news is that there are plenty of extensions and WordPress Plugins you can use to check the CSS validation of your website. You can search for them and pick the best one to test the CSS validity of your website. 

If you want to use sliders, and carousels on your website you must ensure that they are created with perfect coding. An easy way out is to use a plugin. For instance, this Bundle Plugins Pack is a comprehensive set of plugins that makes your life easy. It encapsulates all sorts of plugins ranging from news widgets to slider and image carousels to name a few. They are perfectly coded keeping in mind the W3C aspect. 

  • HTML Validator

Check the validity of your website in terms of SMIL, MathML, HTML, and XHTML for HTML validation. Again, there are tons of tools to test your website on these parameters. 


Following W3C-compliant standards is the need of the hour and if you want more website traffic and better search engine rankings, you cannot ignore it. For more info related to W3 validator HTML or CSS feel free to connect with us.

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