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Free CMS & Tech Checker

Find out which CMS any website runs on, plus its full technology stack: frameworks, analytics, hosting, server and more. Paste a URL to reveal everything.

Why check a site's CMS & stack?

Knowing the CMS and full stack tells you how a website is built and maintained. For a web design agency, an outdated WordPress install or a templated Wix site is a clear signal the business is a strong prospect for a redesign. The framework, analytics and hosting reveal how technical (and how invested) they are.

LeadWebia detects the CMS and tech automatically on every lead it finds, so agencies can filter prospects by stack at scale.

Frequently asked

What does this CMS & tech checker detect?expand_more

It detects the CMS a site runs on (WordPress, Wix, Shopify, Squarespace, Joomla, Drupal and more) plus the wider stack: JavaScript frameworks, e-commerce platforms, analytics, hosting/CDN, web server and security technologies, with versions where available.

How does it work?expand_more

We fetch the public homepage and fingerprint its HTML, scripts, headers and signatures, the same technique tools like Wappalyzer and BuiltWith use. No login or access to the site is required.

Why does the CMS say "unknown"?expand_more

Some sites are custom-built, hide their stack, or block automated requests. "Unknown" means no common off-the-shelf CMS was detected, but the technology list below may still reveal the framework and stack.

Is it free?expand_more

Yes, completely free with no signup. It is one of several free website tools from LeadWebia.

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LeadWebia runs these checks across thousands of local businesses and hands you a qualified lead list. Start with 100 free leads.