License4J Library and GUI Tools

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License4J is a total solution for software product licensing. It provides Java libraries and GUI tools for generation and validation of license files and license keys.

License4J provides software licensing solutions for applications developed with Java. It is designed to be easy to use and integrate in your application. Unlike other licensing libraries it has many licensing features defined and performs validation on required features when license file is used; also can be used to generate and validate license keys.

License4J comes with License Manager GUI application to generate and store software license files and cryptographically secure serial numbers.

License4J Auto License Generation and Activation Server is a web application which handles license generation, auto activation, manual activation, deactivation, online key validation and blacklist check requests.

license4j Web Site




Other License


  • License File Generation & Validation
  • Serial Number (product key) Generation & Validation
  • Floating License Support
  • Free Floating License Server Included

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Additional Project Details

Intended Audience


User Interface

Java SWT

Programming Language



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