Zelix KlassMaster
Zelix KlassMaster: Deep Java obfuscation controls for teams protecting JVM applications. Ranked #17 of 34 in Code Obfuscation Software by our editors (7.6/10); pricing: 30-day trial; best for deep Java obfuscation for professional teams.
At a glance
- Editor score7.6 / 10
- Pricing30-day trial
- Best forDeep Java obfuscation for professional teams
- Free planNo
- Paid from$265 one-time
- Facts checked21 Sep 2026
Where it wins
- Control-flow, string, constant and reference obfuscation
- Supports Java bytecode from JVM 1.1 through 26, including modules
- Integrates with Ant, Maven and Gradle
Where it doesn't
- No free plan; licensing is paid and one-time
- Desktop software with CLI-based build integration
- Pricing is not shown for every listed license tier
Our verdict on Zelix KlassMaster
Zelix KlassMaster is a desktop Java bytecode obfuscator for developers and organizations that need to make compiled applications harder to decompile and analyze. It targets Java bytecode for JVM versions 1.1 through 26, including Java modules, and runs on Windows, macOS and Linux. Its audience is teams protecting distributed Java applications, libraries and JAR-based deployments that need more than basic name renaming.
Pricing uses one-time licenses rather than a recurring subscription. The Small Developer license costs $265 and is for organizations with no more than two people; software is emailed electronically. The 1 Standard license costs $532, while 2 Standard licenses cost $931. The catalog also lists 3 Standard licenses, 4 Standard licenses, 5 Standard licenses and a Site license for use on any number of machines at one physical location. A 30-day evaluation license is available, and there is no free plan. For build workflows, ZKM Script automation and integrations with Apache Ant, Apache Maven and Gradle connect the obfuscator to established Java tooling.
The product’s main strength is the breadth of its Java-specific controls. Alongside package, class, field and method name obfuscation, it includes control-flow obfuscation, string literal encryption, integer and long constant encryption, reference obfuscation, method parameter changing, exception obfuscation and class trimming. AutoReflection handling addresses Java Reflection API calls, while Smart Save processes JARs and resources. Stack trace translation and line-number scrambling support post-obfuscation diagnostics. Teams seeking deep JVM protection and configurable build integration should consider it; teams wanting a free tier, a recurring cloud service or protection beyond Java bytecode should look elsewhere.
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Zelix KlassMaster pricing
All 7 Zelix KlassMaster plans and prices →
Zelix KlassMaster fact sheet
| Free plan | No |
|---|---|
| Paid from | $265 one-time |
| Supported targets | Java bytecode for JVM versions 1.1 through 26, including Java modules |
| Anti-tamper controls | Not verified |
| Control-flow obfuscation | Yes |
| String encryption | Yes |
| Deployment model | Desktop |
| Build integration | Cli |
| Free trial | 30 days |
| Money-back guarantee | 14 days |
| Deployment | Desktop |
| Platforms | Windows, macOS, Linux |
| Support | Docs, Email |
| Built for | Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 3 integrations: Apache Ant, Apache Maven, Gradle |
| Pricing | 30-day trial (source) |
| Website | zelix.com |
| Facts checked | 21 Sep 2026 |
Zelix KlassMaster integrations
Zelix KlassMaster lists 3 integrations on its own site.
- Apache Ant
- Apache Maven
- Gradle
Alternatives to Zelix KlassMaster
- ByteHide ShieldBroad application protection across .NET, web, Android, and iOS with a free plan.9.4
- JscramblerA focused JavaScript protection suite for teams securing browser and Node.js applications.9.2
- DotfuscatorA broad .NET protection toolkit with a free personal-use entry point and quote-based paid plans.9.0
See all Zelix KlassMaster alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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