WordPress leaves traces in a page's HTML and response headers, and the detector above reads both for them. Paste a URL and it names WordPress when it finds them. It checks the other platforms it knows at the same time, including Shopify, Wix, Webflow and Squarespace. You also see the Server, X-Powered-By and Generator values the site sends.
What a WordPress result tells you
A WordPress match means the page carries WordPress traces in its HTML or headers. WordPress core prints a generator tag in the page head through the wp_head hook. When a site still has that tag, the Generator row names WordPress.
The detector names the platform and stops there. It doesn't list the theme or plugins a WordPress site uses, and it only reads the page you enter.
Why a WordPress site can come back unmatched
Site owners can hide the signs. WordPress lets plugins filter the generator output or remove it, so plenty of WordPress sites send no Generator value at all.
WordPress also lets owners move the wp-content folder, which holds themes, plugins and uploads. When it's moved, the usual file paths can be missing from the HTML, and a WordPress site can look like it runs no known platform.
WordPress details come from the WordPress developer documentation, read in October 2026.
This cMS detector is free with no signup. SearchBlueprint, who make it, sell SEO planning for websites: which searches each page should answer.