Free Website Framework Detector & CMS Checker Chrome Extension

Instantly check any website's CMS platform, frameworks, hosting/CDN, server stack, analytics tags, and SEO/meta signals—the free CMS checker & framework detector Chrome extension for developers, marketers, and SEOs.

Created:  •  Last updated:

Chrome Web Store Install from Chrome Web Store Explore SEO Checklist View on GitHub Ask a Question
Website Framework Detector & CMS checker Chrome extension UI showing detection panel

Key Features

CMS Detection & Checker

Checks and identifies common CMS platforms like WordPress, Shopify, Wix, Magento, Drupal, Joomla, and more.

Frameworks & Libraries

Detects React, Vue, Angular, Next.js, jQuery, Bootstrap, Tailwind, and popular UI kits.

Hosting & CDN

Surface providers like Cloudflare, Netlify, Vercel, AWS, Google Cloud, and common CDNs.

Server & Backend

Signals server stack hints (Apache, Nginx, IIS), languages (PHP, Node.js, ASP.NET), and headers.

Analytics & Tags

Finds GA4, Google Tag Manager, Facebook Pixel, Hotjar, and other tracking snippets.

SEO & Meta

Checks canonical, robots, structured data presence, meta tags, and social cards.

Overview

Website Framework Detector is a lightweight Chrome extension that works as both a CMS checker and a framework detector, helping you understand what any site is built with. In a single click, it scans the active tab and summarizes the platform and technology stack it finds — including CMS detection (WordPress, Shopify, Wix, Magento, Drupal), popular frontend libraries and frameworks (React, Vue, Angular, Next.js, jQuery, Bootstrap, Tailwind), hosting/CDN providers (Cloudflare, Netlify, Vercel, AWS, Google Cloud), server and backend hints (Apache, Nginx, IIS; PHP, Node.js, ASP.NET), analytics tags (GA4, Google Tag Manager, Facebook Pixel, Hotjar), and essential SEO/meta signals. Whether you search for a "website CMS checker" or a "framework detector," this extension answers the same question — what does this site run on? If you also care about on‑page optimization details, pair this tool with the SEO Checklist extension to audit titles, meta descriptions, headings, links, images, structured data, and quick performance/accessibility hints.

Watch It in Action

Screenshots

CMS checker and framework detector results screenshot
Website tech stack breakdown from the CMS checker Chrome extension

See more screenshots and full details on the Chrome Web Store and GitHub.

Requested Permissions

Exact permissions will be finalized per the manifest (see GitHub repo).

How to Install

From Chrome Web Store

  1. Open the Chrome Web Store listing.
  2. Click “Add to Chrome”.
  3. Confirm the installation prompt.
Chrome Web Store Open Web Store

Manual (Developer Mode)

  1. Download the latest release from GitHub.
  2. Go to chrome://extensions and enable Developer mode.
  3. Click “Load unpacked” and select the extension folder.

Privacy & Data

This extension runs locally in your browser. No personal data is collected or transmitted. Detection happens on-device. Optional GitHub usage is client-side only.

Website Framework Detector FAQs

It detects the framework and platform of the active tab—CMS, frameworks/libraries, hosting/CDN, server stack, analytics tags, and SEO/meta—using page markup, headers, and script patterns.

Yes. Website Framework Detector doubles as a website CMS checker: point it at any site and it instantly reports the CMS or builder platform—WordPress, Shopify, Wix, Webflow, Squarespace, Joomla, Drupal, Magento, and more—alongside the full front-end tech stack, a confidence score, and the matched signals behind the result.

Yes. It's free to install and use. Source code will be available on GitHub.

Use the Chrome Web Store listing and click “Add to Chrome”. Alternatively, load it unpacked in Developer Mode using the GitHub release.

No. All detection runs locally in your browser. No personal data is collected or sent anywhere.

Questions or Feature Requests?

Reach out via WhatsApp or open an issue on GitHub. I’d love your feedback.

Contact on WhatsApp Open GitHub Issue