Website Technology Checker Tool Online

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Find out what any website is built with. Detect CMS platforms, JavaScript frameworks, analytics, hosting, CDN, fonts, and dozens of other technologies — all in one scan.

Enter a website to detect its technology stack:

How the Website Technology Checker Works

This tool analyzes a website's publicly visible code and server responses to identify its technology stack. Here's the process:

  1. Enter a URL — type or paste any website address. The tool adds https:// if no protocol is specified.
  2. Fetch and analyze — the checker loads the page's HTML source code and reads all HTTP response headers, including server, caching, and security headers.
  3. Pattern matching — it scans for known technology signatures: specific file paths, meta generator tags, JavaScript globals, DOM attributes, cookie names, and header values unique to each technology.
  4. Categorized results — detected technologies are grouped by category (CMS, Framework, Analytics, Hosting, etc.) with version numbers when available.

Why Knowing a Website's Tech Stack Matters

Understanding what technologies a website uses gives you actionable intelligence for several scenarios:

  • Competitor research — see what CMS, frameworks, and analytics your competitors use. If a high-ranking competitor uses a specific setup, understanding their stack helps you evaluate your own technical decisions.
  • Sales and prospecting — agencies and SaaS companies use technology detection to find potential clients. If you offer WordPress services, knowing which sites run WordPress (and which plugins they use) helps you target the right prospects.
  • Security audits — outdated CMS versions, exposed server headers, and known-vulnerable plugins are all visible through technology detection. Regular checks help identify security risks before they're exploited.
  • Migration planning — before moving a client to a new platform, you need to know exactly what they're running now — CMS, plugins, analytics, forms, chat widgets, and payment processors all need to be accounted for.
  • Learning and inspiration — curious what stack a beautifully designed site uses? Technology detection lets you learn from sites you admire.

Combine this with the WordPress Theme & Plugin Detector for deeper WordPress analysis, or the SSL Certificate Checker to complete your site security profile. Check the site's font stack to see whether fonts are self-hosted or loaded from external CDNs — relevant for GDPR and performance. To assess the server's PHP version, use the PHP Version Checker.

Technologies We Detect

This tool identifies technologies across a wide range of categories:

  • CMS & E-commerce — WordPress, Shopify, Wix, Squarespace, Webflow, Drupal, Joomla, Ghost, Magento, WooCommerce, PrestaShop, and more.
  • JavaScript Frameworks — React, Next.js, Vue.js, Nuxt.js, Angular, Svelte, Astro, Gatsby, Remix, Ember.js, jQuery.
  • UI Frameworks — Bootstrap, Tailwind CSS, Foundation, Material UI.
  • Analytics & Marketing — Google Analytics, Tag Manager, Facebook Pixel, Hotjar, Plausible, Matomo, Microsoft Clarity, HubSpot, Intercom, Mailchimp, Brevo.
  • Hosting & CDN — Vercel, Netlify, Cloudflare, AWS CloudFront, Fastly.
  • Web Servers — Nginx, Apache, LiteSpeed.
  • SEO & Page Builders — Yoast SEO, Rank Math, Elementor.
  • Fonts, Payments & Security — Google Fonts, Adobe Fonts, Stripe, PayPal, reCAPTCHA, hCaptcha, Turnstile.

For a broader SEO audit beyond technology detection, check the Meta Tag Checker and Schema Markup Validator to ensure the site's on-page SEO and structured data are properly configured.

Technology Checker: FAQ

What does this website technology checker detect?
This tool detects CMS platforms (WordPress, Shopify, Wix, Squarespace, etc.), JavaScript frameworks (React, Next.js, Vue.js, Angular, Astro, etc.), UI frameworks (Bootstrap, Tailwind CSS), analytics tools (Google Analytics, Tag Manager, Hotjar, Plausible), web servers (Nginx, Apache, LiteSpeed), CDNs and hosting (Cloudflare, Vercel, Netlify, AWS), programming languages (PHP, ASP.NET), marketing tools (HubSpot, Intercom, Mailchimp, Brevo), SEO plugins (Yoast, Rank Math), fonts, payment processors, and security tools.
How does the technology detection work?
The tool fetches the HTML source code and HTTP response headers of a website. It then scans for known signatures — specific file paths, JavaScript variables, meta tags, cookie names, header values, and HTML patterns that are unique to each technology. For example, WordPress leaves traces like /wp-content/ in URLs, while Next.js includes a __NEXT_DATA__ script tag.
Can this tool detect the version of a technology?
In many cases, yes. When a technology exposes its version in meta tags (like WordPress in the generator tag), in file paths (like jQuery version numbers), or in HTTP headers (like PHP version in X-Powered-By), the tool extracts and displays it. Not all technologies expose their version publicly.
Why would I want to know what technology a website uses?
There are several practical reasons: competitor research (what stack are your competitors using?), sales prospecting (targeting businesses using a specific CMS or plugin), security audits (identifying outdated software), migration planning (understanding what you are moving from), and learning (discovering what successful sites are built with).
Is this similar to Wappalyzer or BuiltWith?
Yes, it serves a similar purpose. Wappalyzer is a browser extension and BuiltWith is a comprehensive profiling service. Our tool is a free, instant online checker — no installation required. It covers the most common technologies across CMS, frameworks, analytics, hosting, and more.
Can websites hide what technology they use?
To some degree, yes. Websites can remove generator meta tags, strip server headers, and minimize HTML patterns. However, most technologies leave multiple traces that are difficult to fully remove — framework-specific DOM attributes, bundled file paths, and script patterns. Our tool checks many signals per technology to maximize detection accuracy.
Does this tool work on any website?
It works on any publicly accessible website. If a site blocks automated requests (through WAF rules or bot protection), the tool may not be able to fetch the page. Sites behind authentication or paywalls cannot be analyzed because the tool only sees publicly available HTML.
How is this different from your WordPress Theme Detector?
The WordPress Theme & Plugin Detector is specialized — it reads the WordPress theme style.css header and scans for specific plugin signatures. This Website Technology Checker is broader — it detects the overall tech stack across any website, not just WordPress. If you already know a site is WordPress, the WP detector gives deeper theme/plugin detail.
Is this technology checker free?
Yes. Completely free, no signup, no limits, and no ads. Built for developers, agencies, and SEO professionals who need quick tech stack intelligence.
Does this tool store the websites I check?
No. The tool only analyzes the page in real-time and returns results. We do not store URLs, HTML content, or detection results.

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