Website Technology Checker
Free website technology checker — fetch any site and detect its CMS, JavaScript frameworks, analytics, libraries and server hints from HTML signatures.
About the Website Technology Checker
Curious what powers a website? This free website technology checker fetches any public page server-side and scans its HTML, scripts and meta tags for the signatures of the technologies behind it — content management systems, JavaScript frameworks, analytics platforms, libraries, fonts and CDNs.
It detects platforms like WordPress, Shopify and Wix; frameworks like Next.js, React, Vue and Gatsby; analytics such as Google Analytics, GTM and Facebook Pixel; UI libraries like jQuery and Bootstrap; and hints about the CDN or server from the markup. Each detection is reported with the evidence that triggered it, so you can trust the result.
Use it for competitive research, lead qualification, technical due diligence, or simply to learn how a site you admire is built. Because it is signature-based, it identifies mainstream stacks reliably and honestly reports when a technology cannot be determined.
How to Use the Website Technology Checker
- 1Enter the website URL you want to analyse.
- 2Click Detect technologies to fetch and scan the page.
- 3Review the detected stack grouped by category, with evidence.
- 4Try an inner page too for signals the homepage may not expose.
Frequently Asked Questions
How does the technology checker identify a site's stack?
It fetches the page and matches its HTML, script sources, meta tags and inline data against a library of known fingerprints. A /wp-content/ path reveals WordPress, a __NEXT_DATA__ script reveals Next.js, a gtag.js include reveals Google Analytics, and so on — each technology leaves recognisable traces.
What technologies can it detect?
Common CMS platforms, JavaScript frameworks (React, Next.js, Vue, Angular, Gatsby), analytics and tag managers, UI and JavaScript libraries (jQuery, Bootstrap), font providers, and CDN or server hints. Coverage focuses on popular, detectable technologies that leave clear signatures in the page source.
Why can't it detect everything?
Server-side technologies (the programming language or database) usually leave no trace in the HTML, and some sites strip or obfuscate their fingerprints. Detection is best for front-end and client-side technologies with recognisable signatures; when there is no clear signal, the tool says so.
How is this different from a CMS detector?
A CMS detector answers one focused question — which content platform runs the site — while this technology checker casts a wider net across frameworks, analytics, libraries, fonts and infrastructure. Use the CMS detector for a quick platform answer and this tool for a full stack picture.
Is checking a competitor's technology allowed?
Yes. The tool only reads the public HTML that any visitor's browser already receives — it performs no intrusion or scanning of private systems. Analysing a public page's front-end technology is standard, legitimate competitive and technical research.