What's Actually Running Behind Any Website?
How tech stack detection works, and why it matters for developers, marketers and security researchers
Behind every website's visual design sits a stack of technical decisions — which CMS powers the content, which server handles requests, which language runs the backend, which database stores the data. None of this is visible to a typical visitor, but almost all of it leaves traces in the HTML source code and HTTP response headers, which is exactly what tools like Wappalyzer and WhatCMS.org are built to read.
What does this analyzer do? Enter any domain and it fetches the live HTML through a CORS proxy, then scans that HTML and the HTTP response headers against a database of regex fingerprints for over 50 technologies — CMS platforms, web servers, programming languages, databases, JavaScript frameworks and analytics tools. Alongside the tech stack, it pulls DNS records via Cloudflare's public DoH API, domain ownership via rdap.org WHOIS, and checks security headers like HSTS and CSP directly from the response.
Why does this matter? Developers use stack detection to understand competitor architecture before a rebuild, or to sanity-check a client's existing site before a migration. Marketers use CMS detection to qualify leads for platform-specific services (a WordPress agency wants to know who's running WordPress). Security researchers use version detection to identify outdated, vulnerable software — an exposed WordPress version number is often the first thing a vulnerability scanner checks. Procurement teams use it to verify vendor claims about a site's technology before signing a contract.
Who should use this tool? Web developers scoping a redesign or migration project. Digital marketers and SEO consultants qualifying prospects by platform. Security-conscious site owners checking their own exposed version numbers. Researchers and journalists investigating who operates a given domain. Anyone curious what technology stack their favourite website runs on.
Real-life example: Analyzing a typical small business website might reveal: WordPress 6.4.2 (CMS), Apache 2.4.58 (server), PHP 8.1 (language), MySQL (database, inferred), Elementor (page builder plugin), and Google Analytics (tracking) — plus three social media profiles found in the footer HTML and an SPF record confirming the domain sends email through Google Workspace. That's a complete technical profile assembled in under ten seconds, the kind of audit that would otherwise require manually viewing page source and running separate DNS lookup tools.
Important limitations: This analyzer reads static HTML fetched through a public CORS proxy — it cannot execute JavaScript, so frameworks or social widgets injected dynamically after page load may be missed. Site administrators who deliberately strip version-revealing meta tags (a recommended WordPress security practice) will show as "version unknown" rather than a false number. WHOIS data may be redacted by privacy protection services. Always treat results as a strong indicator, not a guaranteed exhaustive inventory — particularly for heavily JavaScript-rendered single-page applications.
Website & CMS Analyzer — CMS Version, Server, Language, Social Media & More
Fetches real HTML to detect CMS version, PHP version, Apache/Nginx, MySQL, social media profiles & 50+ technologies
How the Analyzer Detects CMS Version, Language & Social Media Profiles
The same detection methods used by WhatCMS.org and Wappalyzer
<meta name="generator"> tags which contain the exact CMS name and version (e.g. WordPress 6.8.5). WordPress is also confirmed by /wp-content/ paths and versioned script URLs. Joomla, Drupal, Ghost, and 25+ other platforms have unique HTML/path signatures.Server: Apache/2.4.62 (web server + version), X-Powered-By: PHP/8.2.0 (language). Database is inferred: WordPress → MySQL, Django → PostgreSQL/MySQL, Rails → PostgreSQL. This is exactly how WhatCMS.org detects PHP and MySQL for WordPress sites.<a href> links are scanned for known social domains: facebook.com/, linkedin.com/company/, twitter.com/, instagram.com/, youtube.com/, etc. The profile handle is extracted with regex. This gives you the exact profile name and direct URL — exactly what WhatCMS.org shows in its Social Media section.FAQ — How It Compares to WhatCMS.org
Common questions about CMS detection, version numbers, and social media profile finding
6 Mistakes People Make Reading Stack Analysis Results
How to avoid misinterpreting CMS, server and security findings from any tech-detection tool
About This Tool
How this analyzer was built and where its data comes from
KeeHelper is a free calculator and analysis platform built by Keeroot Solutions. This analyzer's detection engine uses the same regex-fingerprinting methodology as Wappalyzer (an open-source project whose technology signature format is publicly documented) — scanning HTML markup, script paths, and HTTP response headers against a curated database of 50+ known technology signatures.
DNS resolution uses Cloudflare's public DNS-over-HTTPS API (1.1.1.1), domain ownership data comes from rdap.org — the official RDAP successor to traditional WHOIS, standardised by IETF RFC 7480 — and security header checks read directly from the live HTTP response. No proprietary or paid data sources are used; every API this tool relies on is public and free.
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