What is the HTML validator?

This FAQ will help you to use the HTML validator

Hypertext Markup Language, or HTML, is the language of the internet. HTML, along with CSS, controls what your website is, and how it looks. These days, with growing computer literacy, its more and more common for people to write their own websites. If you’ve chosen to do this, the HTML validator will check your content to make sure there are no errors, ensuring that your site displays exactly how you want it to.

Please note: this tool is not available on any Web Hosting plans purchased after July 2020 or Premium Hosting plans purchased after August 2020.

Step 1 of 4

Login to your 123 Reg control panel.

Step 2 of 4

Scroll down to the web hosting section.

Select the relevant domain name from the drop down box and click on the Manage button.


Step 3 of 4

Click on the HTML Validator option in the Website Help & Diagnostics section.

Step 4 of 4

This will take you to the W3C Markup Validation Service page, here you can check you HTML code by one of three ways:

  • Validate by URI
  • Validate by File Upload
  • Validate by direct input