Website Tools

Website Technology Checker

Detect the CMS, JavaScript framework, analytics tools, and server technology a website uses.

Enter a domain below to detect its CMS, JavaScript framework, analytics tools, and server technology.

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JustChecker monitors your website's uptime, SSL, and performance continuously, whatever technology you're running.

What Is the Website Technology Checker?

It loads a page and looks for well-known fingerprints to detect the CMS, JavaScript framework, analytics and CDN a site uses - including WordPress, Shopify, Wix, React, Next.js, Vue, Google Analytics, Google Tag Manager, Meta Pixel and Cloudflare.

When to Use It

To see how a competitor's or client's site is built.
Before quoting for a website project or migration.
To confirm that analytics is installed.

How to Use It

Enter the domain.
Review the detected technologies by category.

Understanding the Result

Each detection is based on clear evidence in the HTML or headers, such as a wp-content path for WordPress or a cf-ray header for Cloudflare.

Limitations

It recognises a fixed list of about 22 popular technologies. Server-side languages and custom setups often leave no visible trace, so "not detected" does not mean "not used".

Frequently Asked Questions

It looks for well-known signatures in a page's HTML, response headers, and script references - like WordPress's /wp-content/ paths, Shopify's CDN, or Google Analytics tracking code. It is a lightweight scan, not an exhaustive fingerprint database.

No - it checks against a curated list of common CMS platforms, JavaScript frameworks, analytics tools, and CDNs. Some custom-built or less common technologies may not be detected.

This tool automates what you'd otherwise have to look for manually by viewing a page's source code and headers, and organizes the findings into clear categories.