See what a website is built with, from the CMS and hosting to analytics, page builders and chat widgets.
Free, no sign-up. We fetch the public page you enter from our server to run the checks. Results are kept for a few minutes and not shared.
Knowing how a website is built is useful when you plan your own. If a competitor's fast, good-looking site runs on WordPress with a particular page builder, or on Shopify, that tells you what is realistic for your budget and which skills your developer needs.
The detector looks for fingerprints in the page code and server headers: file paths such as /wp-content/, generator tags, cookies and script addresses. It only reads the public home page, so tools used behind a login or loaded later by scripts may not appear, and a site can hide its technology on purpose.
Check any page for the on-page SEO issues that stop it ranking on Google, with a score and fixes.
Use free tool WebsiteTest how fast a website loads, with Google PageSpeed scores, page weight and what slows it down.
Use free tool WebsiteCheck HTTPS, security headers, cookies and leaked software versions, with an A to F grade.
Use free tool WebsiteFind broken links and images on any page, plus redirects that slow visitors down.
Use free tool WebsiteSee how a website looks on phones and tablets and check it is truly mobile-friendly.
Use free tool WebsiteCheck an SSL certificate: expiry date, issuer, domains covered, chain and TLS version.
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