# jarsigner > Sign and verify Java archive (JAR) files. > More information: . - Sign a JAR file: `jarsigner {{path/to/file.jar}} {{keystore_alias}}` - Sign a JAR file with a specific algorithm: `jarsigner -sigalg {{algorithm}} {{path/to/file.jar}} {{keystore_alias}}` - Verify the signature of a JAR file: `jarsigner -verify {{path/to/file.jar}}`