Website Technology Detector

Detect React, Laravel, WordPress, Shopify & Bootstrap on any site.

Find out what any website is built with. Enter a URL and we fetch it through our server to detect popular technologies — React, Laravel, WordPress, Shopify and Bootstrap (plus extras like Next.js, jQuery and Tailwind) — from its HTML, scripts, response headers and cookies, showing the exact evidence behind every match. Free, no sign-up, no API key.

How to use Website Technology Detector

  1. Enter the website

    Type any website URL into the free online website technology detector, or click Load example to fingerprint a sample site's tech stack instantly.

  2. Enable deep scan

    Keep Deep scan on so the tool reads the page's JavaScript and CSS bundles, accurately detecting client-rendered React, Vite, Angular and Vue single-page apps.

  3. Run the detection

    Click Detect and the page plus its assets are fetched server-side through our SSRF-screened proxy, sidestepping CORS with no API key required.

  4. Read the quick check

    See an instant yes or no for React, Laravel, WordPress, Shopify and Bootstrap in the Quick check panel before diving into the full results.

  5. Explore the stack

    Browse detected frameworks, UI libraries, CMS platforms, server, CDN and analytics grouped by category, each with the evidence behind every match.

  6. Verify the evidence

    Review version numbers and confidence levels on each technology card, then cross-check tags or DNS with the linked Meta Tag Viewer and WHOIS tools.

Frequently asked questions

How do I check what technology a website is built with?

Paste the site's URL into this website technology detector and click Detect. It fetches the page and its JavaScript and CSS bundles server-side, then fingerprints the full stack — frameworks, UI libraries, CMS, server, CDN and analytics — showing the evidence behind every match.

How can I tell if a website is built with React, Next.js, Vue or Angular?

This tech-stack detector scans the page's JS bundles, so it identifies React, Next.js, Vue, Nuxt, Angular, Svelte, Astro, Gatsby, Remix and more even on single-page apps. The 'Quick check' panel gives an instant yes/no for React, Laravel, WordPress, Shopify and Bootstrap.

Does this website technology checker work on single-page apps (SPAs)?

Yes. Many tech detectors miss client-rendered SPAs because their static HTML is an empty shell. This tool reads the linked JavaScript and CSS bundles too, so React/Vite, Angular and Vue apps are detected correctly. Leave 'Deep scan' enabled for the best SPA results.

How do I find out which CMS or platform a website uses?

Enter the URL and the detector reports CMS and platform fingerprints such as WordPress, Shopify, Wix, Squarespace, Webflow, Drupal, Joomla, Ghost and Framer — pulled from the HTML, headers, cookies and bundle contents.

Can this tool detect a website's server, hosting and analytics?

It does. Alongside frameworks and CSS libraries, this technology detector reads response headers and tags to surface server and backend tech (Laravel, PHP, ASP.NET, Rails), CDN and hosting (Cloudflare, Vercel, Netlify) and analytics like Google Analytics and Google Tag Manager.

Is this website tech detector free and do I need an API key?

It is completely free with no sign-up and no API key. The page is fetched through our own SSRF-screened server so CORS never blocks it, nothing you enter is stored, and no third-party detection API is used.

Why does the tech detector say 'not found' for a technology I know is there?

Detection is signature-based on the HTML, JS/CSS bundles, headers and cookies, so a technology can be present without leaving a public fingerprint. A 'not found' result isn't a guarantee — minified or obfuscated bundles and fetch-blocking sites can hide an otherwise-present stack.

How can I tell what platform a website is built on?

Enter the URL and the detector reports the CMS or platform — WordPress, Shopify, Wix, Squarespace, Webflow, Ghost and more — from fingerprints in the HTML, headers and cookies, with the evidence behind each match so you can trust the result.

Is the website technology detector accurate?

A positive match with visible evidence is reliable. A 'not found', however, isn't proof the tech is absent — minified bundles, server-side rendering or fetch-blocking can hide an otherwise-present technology, so treat negatives as 'no public fingerprint' rather than definitive.

Related tools — Site diagnostics