What this tool detects
This lookup fetches a page and fingerprints the technologies behind it from its response headers and the markup it returns. It groups what it finds into categories like framework, CMS, web server, CDN, analytics, and payments. It is a fast way to see how a site is built, whether you are researching competitors, vetting a vendor, or just curious what powers a page.
Frequently asked questions
How does the detection work?
It reads clues from the server's response headers and the page's HTML, such as framework markers, script sources, and known header signatures. It reports high-confidence matches rather than guessing.
Why did it miss something I know is there?
Detection relies on visible markers. Technologies that run only on the server, sit behind a proxy, or strip their fingerprints will not always show up. A clean result does not prove a stack is absent.
Can it detect the CMS?
Often yes. Common systems like WordPress, Shopify, Drupal, Wix, and Squarespace leave clear markers in their markup, and the tool reports them under the CMS or website builder category.