> Markdown version of [Spring Boot](https://vaadin.com/docs/v24/hilla/guides/production/spring-boot). Section index: [llms.txt](https://vaadin.com/docs/v24/hilla/llms.txt)

# Deploying Spring Boot-Based Applications

[Spring Boot](https://spring.io/projects/spring-boot) applications are slightly different from tradition Java web applications (or Jakarta EE applications) in that they by default create a `JAR` file with an embedded server in it, rather than a traditional `WAR` file that’s deployed to a standalone Servlet container or fully featured Java EE server.

Alternatively, Spring Boot applications can be packaged as `WAR` files, too. See the [Spring Boot documentation](https://docs.spring.io/spring-boot/how-to/deployment/traditional-deployment.html#howto.traditional-deployment.war) for instructions on how to do this.

The main differences between `JAR` and `WAR` packaging are as follows:

`JAR` packaging:

- no need for a server binary install; a Java Runtime is all that’s needed

- bigger package size

`WAR` packaging:

- a separate Java Servlet container is needed

- free choice of servers, including Jetty, Tomcat, WildFly, GlassFish, and others

- smaller package size

You can read more about Spring applications and how to deploy them on the [official Spring website](https://spring.io/).