Website Technology Checker

How the Website Technology Checker Works

This tool analyzes publicly visible code and server responses to help identify what a website is built with. It works as a CMS, website platform, and tech stack checker, but it cannot inspect private backend code. 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 follows safe public redirects, then reads the final response headers and scans up to 2 MB of returned HTML. It does not render the page or run JavaScript.
3. Match public evidence, it checks specific asset URLs, meta generator tags, source attributes and inline markers, cookie names, and relevant header values. It inspects referenced URLs but does not download linked files.
4. Review qualified results, matches are grouped by category with confidence and visible evidence. Any version shown came from a technology-specific public string and still needs verification.
5. Export a working inventory, copy or download CSV or JSON with evidence, version provenance, uncertainty and verification steps. Confirm the findings with the site owner before migration or maintenance decisions.

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 review preparation, exposed version and server clues can help scope a proper authenticated audit. A public technology scan does not determine whether a site is patched or vulnerable.
• Migration planning, use the exposed CMS, analytics, form, chat, and payment clues to start an inventory, then confirm it with the site's owners and account records before estimating a migration.
• 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 inspect publicly exposed PHP version clues, use the PHP Version Checker.

Technologies We Detect

This tool identifies technologies across a wide range of categories:

• CMS, website builders & E-commerce, WordPress, Shopify, Wix, Squarespace, Webflow, Drupal, Joomla, Ghost, Magento, WooCommerce, BigCommerce, Duda, Framer, 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 & edge clues, Vercel, Netlify, Cloudflare, Amazon CloudFront, Amazon S3, Fastly.
• Server & backend clues, Nginx, Apache, LiteSpeed, PHP, ASP.NET, Express, Java Servlet, and Ruby on Rails. These can describe an edge proxy or session convention rather than the complete origin architecture.
• SEO & Page Builders, Yoast SEO, Rank Math, Elementor.
• Fonts, Payments & Security, Google Fonts, Adobe Fonts, Stripe, PayPal, reCAPTCHA, hCaptcha, Turnstile.
• Declared page language, the HTML lang value is shown separately from backend programming-language clues, with a warning if it conflicts with the Content-Language header.

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.