Technology fingerprinting

What software and versions sit behind a website?

Fingerprinting tools read response headers, HTML, cookies and scripts to name the CMS, framework, server and analytics in use. Versions matter because they map to known vulnerabilities.

Listed alphabetically. The order is not a ranking.

• WhatWebActive

  Ruby web fingerprinter with 1800+ plugins that identifies CMSs, frameworks, servers, analytics, JavaScript libraries and versions.

  7.0k stars · last push April 2, 2026 · v0.6.4 · GPL-2.0