Tech Stack Check
Reads the headers, cookies, and markup of one page. Does not crawl or test for vulnerabilities.
Tech Stack Check visits the page you enter, the way a browser does, and reads what any visitor receives: response headers, cookie names, and the page's markup. Software leaves fingerprints there, like a Server header naming nginx or a generator tag naming WordPress. When a page names its CMS but not the version, the check may fetch one or two public files that CMS publishes, such as WordPress's RSS feed.
It doesn't log in, guess passwords, scan ports, or test for vulnerabilities. Everything it reads is public, and nothing the site sends back is kept.
A site can hide or fake these signals, so a result is what the site discloses, not a guarantee. Confirmed means the site named the product; Inferred and Possible mean it was deduced from indirect signs. Support lines come from each project's published end-of-life dates.