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.
Detection stays local.
Detection runs in your browser against the page you already loaded. No account required. Reports are optional, and automatic domain reporting stays off unless you enable it.
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.
