Website Technology Checker

What this tool checks

A website technology checker reads a page's HTML source and HTTP response headers and matches them against known fingerprints to name the CMS, e-commerce platform, JavaScript framework, analytics tags, and CDN behind a site. It matters because the stack determines whether your main content is server-rendered or injected by JavaScript — client-only content is often missed, delayed, or dropped by search crawlers, and effectively invisible to AI answer engines that don't execute JavaScript, so it may go unindexed and uncited. Auditing your own stack (or a competitor's) tells you why pages render as they do and where hosting or rendering bottlenecks hide.

What it looks at

CMS fingerprint

Signals like the meta generator tag or /wp-content/ paths reveal the content platform (WordPress, Ghost, Drupal), which governs URL structure, templating, and the plugin surface.

JavaScript framework

React, Vue, Next.js and Angular markers show whether the page renders on the client; content assembled only in the browser risks being unseen by crawlers and AI engines that don't execute JS.

E-commerce platform

Signatures from Shopify, WooCommerce or Magento identify the storefront engine, which shapes product schema, checkout, and catalog URL patterns.

Analytics & tag managers

Detecting Google Analytics, GTM or tracking pixels shows how the site measures traffic and what third-party scripts load on every page.

CDN & hosting

Response headers such as Server, CF-Ray or X-Powered-By expose the delivery network and host, which drive TTFB, caching behaviour, and page speed.

HTTP response headers

Beyond the HTML body, the raw headers are a second detection surface — server software, powered-by strings, and cookie names each act as a fingerprint no rendered page shows.

How to use it

1. Paste the site URL — your own or a competitor's — and run the check.
2. Review the detected stack (CMS, framework, e-commerce, analytics, CDN) and note any JavaScript-framework flag that signals client-rendered content.
3. Act on it: confirm your critical content is server-rendered so AI and search crawlers can read it, or benchmark the competitor's platform and delivery choices against yours.

Frequently asked questions