Spring
Spring is a comprehensive framework for building enterprise-level Java applications, providing tools and infrastructure for application development, including dependency injection, transaction management, and integration with various technologies.
What detecting Spring tells you about a site
Spring (Spring Boot) is the de facto Java application framework, detected from JVM server signals. Look for a JSESSIONID cookie, a Server header naming an embedded Tomcat/Jetty/Netty, Spring Security's response headers, and — when exposed — Actuator endpoints like /actuator/health. Spotting it points to an enterprise or platform team: banking, insurance, large e-commerce and B2B SaaS where the JVM's stability, the Spring ecosystem and a deep hiring pool outweigh front-end fashion. The browser side is usually a separate SPA talking to a Spring REST API.
Spring in a real-world stack
When you find Spring, it rarely travels alone. Embedded Tomcat or Netty (WebFlux) as the runtime, a relational database with JPA/Hibernate, and a decoupled React/Angular front end.
About
Spring is a comprehensive framework for building enterprise-level Java applications, providing tools and infrastructure for application development, including dependency injection, transaction management, and integration with various technologies.
Categories: Web frameworks
Quick facts
How we detect Spring
Sourcemap Explorer carries 1 fingerprint signal for Spring, spread across 1 channel — response header. The exact patterns are listed below, and you can replay each one in Chrome DevTools to confirm a match by hand.
Each signal alone is rarely conclusive — Sourcemap Explorer cross-references all of them and weights by confidence. You can reproduce any of these checks yourself in Chrome DevTools.
Server-side fingerprint: the response header reveals the technology behind the page. Visible in DevTools → Network → response headers.
X-Application-Context:
Implies
When Springis detected, Sourcemap Explorer also marks the following technologies as present (Wappalyzer's implies graph).
FAQ
How do I check if a website is using Spring?
Open the page in Chrome, click the Sourcemap Explorer toolbar icon, and read the Stack tab. Spring's specific fingerprints here are response header, and the popup flags Spring whenever any combination of them is found. The same checks can be reproduced manually in DevTools — see the "How we detect" section above.
What Spring version can Sourcemap Explorer detect?
Spring ships as a hosted web frameworks rather than a bundled npm package, so version-specific detection isn't always possible. Where the platform leaks a version in response headers (`X-Powered-By`, `Server`, generator meta tags) we surface it; otherwise we report presence only.
Is Spring open source?
Yes, Spring is open source. The license details are listed on the official site (https://spring.io), and the codebase typically lives on a public source-control host.
Where can I read more about Spring?
Official site: https://spring.io. For Sourcemap Explorer's detection guide, see the deep-dive link below or the related guides in the cross-link section.
Detected by Sourcemap Explorer
Open the popup on any page running Springand you'll see the exact version pulled from the bundled package.json when sourcemaps are exposed.