{{Short description|Software development tool for security}}
A '''Java KeyStore''' ('''JKS''') is a [[content repository|repository]] of security certificates,{{spaced ndash}} either [[authorization certificate]]s or [[public key certificate]]s{{spaced ndash}} plus corresponding [[Private key|private keys]], - used for instance in [[Transport Layer Security|SSLTLS encryption]].
In [[IBM WebSphere Application Server]] and [[Oracle WebLogic Server]], a file with extension ''jks'' serves as a keystore.
The [[Java Development Kit]] maintains a [[Certificatecertificate Authorityauthority|CA]] keystore file named ''cacerts'' in folder ''jre/lib/security/cacerts''. JDKs provide a tool named ''keytool''<ref>[httphttps://javadocs.sunoracle.com/en/java/javase/617/docs/tooldocsspecs/solarisman/keytool.html The ''keytool'' Command - Keya key and Certificatecertificate management Managementutility Tool]</ref> to manipulate the keystore. ''keytool'' has no functionality to extract the private key out of the keystore, but this is possible with third-party tools like jksExportKey,<ref>[http://miteff.com/jksexportkey jksExportKey - A free tool for exporting private keys out of the keystore as standalone files]</ref> CERTivity,<ref>[http://www.edulib.com/products/keystores-manager/ CERTivity - A multi-platform visual tool for managing keystores]</ref> and Portecle<ref>[http://portecle.sourceforge.net Portecle - Portecle is an open-source GUI application for creating, managing and examining keystores.]</ref> and KeyStore Explorer.<ref>[http://keystore-explorer.org KeyStore Explorer - An open source GUI replacement for the Java command-line utilities keytool, jarsigner and jadtool.]</ref>
