How to Know if a Website Is on WordPress

1. Visit the website in your browser and then right-click on the page. Select 'View Source' so you can look at the code for the website. Note that although you can see source code for any website, you cannot see any PHP code. Since PHP code runs on servers, you can only view the results of PHP code. You can see any JavaScript code, but not HTML generated by the JavaScript.
2. Look for the following line of code:
WordPress uses this profile, but only if the programmer who created the theme -- templates used by WordPress -- included the proper PHP code in the '
' tag of the 'header.php' template file.

3. Scroll down and look for any code referencing 'widgets.' Since WordPress refers to its sidebar contents as 'widgets,' this is a good sign that the website is built upon WordPress. See if the tags labeled 'widget' are in a series contained within a tag labeled 'sidebar.' In this case, it is almost certain that the website uses WordPress.