Free Website Technology Stack Checker
Fingerprint the technology behind any website — web server, CMS, frameworks and JavaScript libraries — and surface the software versions a site discloses in its headers and markup.
By scanning, you confirm you own or have permission to test this domain. Not a substitute for manual penetration testing.
What this technology checker checks
How it works
Read-only· one HTTPS request- 1We fetch your homepage once and fingerprint it from response headers, HTML markup, cookies and bundled JavaScript.
- 2We identify the web server, CMS/generator, frameworks and libraries, surface any version numbers they disclose, and detect the CDN/WAF in front.
- 3We also compute a Shodan-compatible favicon hash (mmh3) so you can see what an attacker can correlate about your asset.
What it doesn’t do: It reports what is disclosed; it does not exploit anything or confirm a version is vulnerable.
Why it matters
Attackers fingerprint your stack first, then look up public exploits for the exact versions you run. Knowing what you expose — and which versions are disclosed — lets you reduce that footprint before it's weaponised.
Frequently asked questions
Is the technology checker free?
Yes — technology fingerprinting runs as part of the free ONEROXE recon scan, with no sign-up.
Can attackers see my tech stack too?
Yes. Server headers, response patterns and bundled libraries reveal your stack to anyone — which is exactly why you should know what you expose and keep it patched.
Does it flag known-vulnerable libraries?
This quick check fingerprints technologies and any versions they disclose. For end-of-life and known-CVE correlation against a vulnerability database, run the full recon scan at /scanner.
Some of our JavaScript frameworks are not showing — why?
Technology detection reads HTTP headers and the initial HTML response. Frameworks that bootstrap after JavaScript runs (React, Vue, Angular) may not appear here. For a complete picture, check your own package.json or use a browser extension like Wappalyzer.