Discover what CMS, frameworks, servers, and libraries any website is running. Powered by WhatWeb fingerprinting.
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A technology stack detector fingerprints a website to reveal what it's built with — its CMS, web server, programming language, JavaScript frameworks, CDN, and analytics. Secably uses WhatWeb fingerprinting to identify the stack instantly, free, with no signup.
Every website leaves fingerprints. The server it runs on, the CMS behind it, the JavaScript libraries it ships, the CDN in front of it — each leaves traces in HTTP headers, cookies, HTML markup, and asset paths. A technology stack detector reads those traces and reconstructs what the site is built with, without any access to the server itself.
It's the fastest way to answer "what is this site running?" — whether you're sizing up a competitor's setup, onboarding a codebase you didn't write, or mapping the software an organization exposes to the internet.
Attackers fingerprint before they exploit. Knowing a site runs an outdated CMS, a JavaScript library with a known CVE, or a server version that's fallen out of support tells them exactly where to push. Popular platforms are the biggest target surface simply because they're everywhere — WordPress alone powers over 40% of all websites (W3Techs, 2025). Detecting your own stack first lets you patch the same weaknesses before someone else catalogs them.
Secably runs WhatWeb against the target and matches its response against a large library of known technology signatures.
Matches server headers, cookies, meta tags, and script paths against WhatWeb's signature library to name each technology.
Identifies the CMS, web server, language, JavaScript frameworks and libraries, CDN, and analytics — the whole stack, not just the CMS.
Surfaces version numbers wherever the site reveals them — the detail that decides whether a component is affected by a known CVE.
Type a domain or full URL like example.com. No configuration needed.
Secably fingerprints the response with WhatWeb and matches it against thousands of known signatures.
See every detected technology grouped by layer, with versions where exposed. Save and compare results with a free account.