Zelix KlassMaster

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On the record

Android

The FAQ says Zelix KlassMaster supports Android by obfuscating Java class files before they are converted into an APK.zelix.com · read 9 Oct 2026

Automation

ZKM Script can automate obfuscation and integrate it into a build cycle, and the product also has a GUI and build tool interface.zelix.com · read 9 Oct 2026

Build integrations

The vendor provides a basic Gradle plugin and documents calling Zelix KlassMaster through a generic Java API; newer Gradle versions may cause failures due to bytecode instrumentation.zelix.com · read 9 Oct 2026

Evaluation limit

The evaluation license is for one computer and 30 days, and the evaluation version flow-obfuscates only one or two methods in each class.zelix.com · read 9 Oct 2026

Java compatibility

The product can process bytecode compiled for Java 1.1 through Java 27, including modules.zelix.com · read 9 Oct 2026

License terms

A standard commercial license is perpetual, non-exclusive, and non-transferable for use on one computer.zelix.com · read 9 Oct 2026

Obfuscation features

Features include flow, exception, name, reference, method parameter, string, integer, and long obfuscation or encryption.zelix.com · read 9 Oct 2026

Privacy and security

The privacy policy says Zelix uses reasonable measures to protect personal information but cannot guarantee absolute security; it also says it does not sell or rent personal information.zelix.com · read 9 Oct 2026

Purpose

Zelix KlassMaster obfuscates Java code to make reverse engineered source code less useful and protect it from decompilation and reverse engineering.zelix.com · read 9 Oct 2026

Reflection and packaging

AutoReflection handles complicated Java Reflection API calls, and Smart Save simplifies handling JAR, resource, and Enterprise Java Beans deployment descriptor files.zelix.com · read 9 Oct 2026

Runtime platforms

The vendor says the Java-based product should run on platforms with a Java 8 or later virtual machine and lists tested Windows, Linux, and macOS environments.zelix.com · read 9 Oct 2026

Size reduction

Name obfuscation reduces package, class, field, and method name sizes, while Trim removes unused classes, fields, and methods.zelix.com · read 9 Oct 2026

Support

Technical support directs users first to the FAQ and online documentation, then to email support with product version, JVM, operating system, and error details where applicable.zelix.com · read 9 Oct 2026

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