The open
index of the
web's stack.
See what any site is built with — frameworks, CMS, analytics, servers, languages. Every detection backed by the evidence that produced it, computed entirely in your browser.
Proof, not vibes.
Every detection shows the exact signal that produced it — a header, a meta tag, a JavaScript global. Verify any claim yourself; debug false positives; trust what you ship in a report.
Your browser. Full stop.
Detection runs against the page you already loaded. No URL is sent anywhere, no account exists, no analytics ride along. The extension makes zero network requests — the fonts are bundled.
An open registry.
Every fingerprint is a readable YAML file, tested against real captured sites in CI. Wrong or missing? One pull request fixes it for everyone.
Collect
On each page the extension reads local signals: HTML, script URLs, headers, cookies, meta tags, JS globals.
Match
Signals run against the open fingerprint registry. Each match carries a confidence grade and its evidence.
Report
The stack appears in the popup, grouped and versioned. Copy it as text or export the full evidence as JSON.