Java is a general-purpose language that runs a large part of enterprise web back ends on servers such as Tomcat, Jetty, WildFly and Spring Boot. AIWebsiteDetector reports Java from Server banners such as Apache-Coyote or Jetty, Servlet/JSP X-Powered-By headers, the `JSESSIONID` session cookie, relative `.jsp` links, and from a detected Spring Boot application. Servers that hide their banner and use a different session name cannot be identified from outside, so a missing result does not mean the site is not Java.
Paste any URL to instantly detect whether it was built with Java. Our engine checks 2 technical signals.
Java is used across many industries. These are the most common website types built on this platform:
Businesses of all sizes
Fast, reliable site building with professional results
Designers and developers
Powerful tools with minimal setup
Startups
Quick launch with scalable infrastructure
Content creators
Beautiful presentation for your work
Every Java website leaves distinctive technical fingerprints. Here's what to look for:
Explore how Java compares to similar backend framework tools: