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What is any site built with?
Enter a domain to see its frameworks, analytics and eventing tools,
CMS, hosting and CDN — read straight from the site's published code.
stripe.com
nginx ·
3 technologies detected
Cached result
Confirmed — unambiguous signal
Likely — heuristic marker only
Analytics
1
Google Analytics 4
Audience MeasurementConversion Tracking
Security headers
5/6
✓
HSTS
Forces HTTPS on future visits
✓
Content Security Policy
Restricts what the page may load
✓
X-Frame-Options
Blocks clickjacking via framing
✓
X-Content-Type-Options
Stops MIME-type sniffing
✓
Referrer Policy
Controls referrer leakage
—
Permissions Policy
Limits browser feature access
AI readiness
Strong
Content structure
74
Schema, FAQ markup and answer-shaped passages
Schema depth
50
2 valuable types detected
AI crawler access
100
13/13 tracked crawlers allowed
Machine-readable index
100
llms.txt present
Not detected
3
—
No tag manager detectedEvery new tag needs a developer and a deploy.
—
No consent management detectedAnalytics and advertising cookies without consent are a GDPR exposure.
—
No error tracking detectedFront-end exceptions reach users before anyone on the team hears about them.
Subdomains
—
Certificate transparency lookup was unavailable — subdomains couldn't be checked.
i
This reads the site's published HTML only. It sees what the
server sends, not what runs afterwards in a browser.
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FAQ
Frequently asked questions
- How does the tech stack checker work?
- Can it detect everything a site uses?
- What do 'confirmed' and 'likely' mean?
- Is the tech stack checker free?
How does the tech stack checker work?
+
It fetches the page's published HTML and inspects four signals: script URLs, inline script contents, meta and DOM markers, and the HTTP response headers and cookies. Each signal is matched against a table of known technology fingerprints.
Can it detect everything a site uses?
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No, and it says so. The checker reads published HTML only, so tools loaded at runtime by a tag manager may not appear. When a tag manager is detected, the results flag that the list may be incomplete rather than implying it is exhaustive.
What do 'confirmed' and 'likely' mean?
+
Confirmed means an unambiguous signal was found, such as a Google Tag Manager container ID or a server header. Likely means only a heuristic marker matched, such as a DOM attribute that a framework usually leaves behind but which can occur by coincidence.
Is the tech stack checker free?
+
Yes. No account is required, and full results are shown without a signup wall.