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WAR JAR
Not possible

Convert WAR to JAR

Can you convert WAR to JAR?
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Is it possible to convert WAR to JAR?
No - not a direct conversion.

WAR and JAR are both ZIP/JAR-family but serve different roles (web app vs library/standalone app). Renaming won't make a web app run standalone. Modern Spring Boot can BUILD an executable fat-JAR instead of a WAR - that's a build-config choice, not a file conversion.

No direct path
Also to JAR: JAVA · PACK · DEX

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Tested on macOS, Windows & Linux
Last verified Oct 2026

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Converting WAR to JAR

A .WAR file and a .JAR file hold different kinds of data, so there is no direct way to turn one into the other.

A full step-by-step guide for this conversion is on the way; the information above is drawn straight from our database.

About these formats

.WAR Web Application Archive (Java WAR)

A WAR (Web Application Archive) is the standard package format for a Java web application. You do not open it like a document; you deploy it to a servlet container such as Apache Tomcat by…

Open .WAR details →
.JAR Java Archive

A JAR file is a Java Archive - a ZIP bundle of compiled Java bytecode (.class files), resources, and a manifest. To run an executable JAR you need Java installed (OpenJDK/Temurin is free),…

Open .JAR details →