No. Files are opened entirely in your browser using local JavaScript and WebAssembly. Nothing is sent to a server.

Does it work on mobile?

Yes. The viewer is mobile-first and works on phones, tablets, and desktops.

Archives.jar · .war · .ear · .apk

JAR / WAR viewer

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JAR / WAR · .jar · .war · .ear · .apk

Java archives (ZIP with manifests).

Choose a fileor paste · ⌘V

About JAR / WAR

Java archives (ZIP with manifests).

JAR/WAR/EAR are zipped Java packages with a MANIFEST.MF. We extract the manifest, list classes, and let you inspect any embedded file.

FAQ

What is a JAR / WAR file?: JAR/WAR/EAR are zipped Java packages with a MANIFEST.MF. We extract the manifest, list classes, and let you inspect any embedded file.
Is my file uploaded?: No. Files are opened entirely in your browser using local JavaScript and WebAssembly. Nothing is sent to a server.
Does it work on mobile?: Yes. The viewer is mobile-first and works on phones, tablets, and desktops.

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