Free PKI tool

Free JKS Generator — build a Java KeyStore online

Turn a certificate, its private key, and an optional chain into a Java KeyStore (.jks) file for Tomcat, WildFly, and other Java application servers — no keytool command line required.

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How it works

Three steps, nothing leaves your browser

Paste certificate, key & chain

Your leaf certificate, matching private key, and any intermediate certificates.

Set an alias & password

The alias name and keystore password your Java server config expects.

Download the .jks

Built locally in your browser — verify it with keytool -list -v -keystore before deploying.

Questions

Common questions

What is a JKS file used for?

A Java KeyStore holds a certificate and private key for Java application servers like Tomcat and WildFly to use for TLS.

Is the JKS format officially documented?

No — it's Java's own proprietary, reverse-engineered format. This tool matches that reverse-engineered spec closely, but always verify with keytool -list -v -keystore yourfile.jks before relying on it in production.

Is my private key uploaded to build the JKS?

No — the keystore is built entirely client-side in your browser; nothing is transmitted.