Mobile app protection
Threat Protection
Prevent mobile app exploitation.
Code Hardening
Protect APK and SDK code.
Runtime Application Self-Protection (RASP)
Defend apps at runtime.
Products
DexGuard
Protect & optimize Android apps and SDKs.
iXGuard
Protect iOS apps and SDKs.
ProGuard
Optimize Java and Android apps.
Quicklinks
Download DexGuard fact sheet
Download iXGuard fact sheet
ProGuard Manual
Resources
Guardsquare Blog
Learn about mobile application security best practices, industry news, and much more.
Engineering Blog
Learn about technical topics related to mobile app security, straight from our engineers.
Resource Center
Find in-depth information on topics related to mobile app security, Android, iOS, and beyond.
Company
About us
Learn about Guardsquare’s vision, history, and management team.
Careers
View our current job openings in Europe and the U.S.
Customers
Learn more about our customer base and view testimonials.
Partners
Learn about our global network of distributors, integrations, and technology partners.
Request pricing

ProGuard

The open source optimizer for Java bytecode

ProGuard is the most popular optimizer for Java bytecode. It makes your Java and Android applications up to 90% smaller and up to 20% faster. ProGuard also provides minimal protection against reverse engineering by obfuscating the names of classes, fields and methods.

ProGuard can be used free of charge to process your applications, commercial or not. The ProGuard code itself is copyrighted and is distributed under the terms of the GNU General Public License (GPL), version 2. The user manual is copyrighted as well and may only be redistributed in its original form along with the unmodified code.

Download ProGuard

ProGuard manual

ProGuard obfuscates Java applications and pre-verifies the processed code for Java Micro Edition and for Java 6 and higher.

ProGuard optimizes and obfuscates Java applications for cell phones, Blu-ray players, set-top boxes and other constrained devices.

ProGuard reduces the download and startup time of Android applications and improves their performance on mobile devices.

Highlights

ProGuard is a command-line tool with an optional graphical user interface.
ProGuard is easy to configure. A few intuitive command line options or a simple configuration file is all it takes. All available options are detailed in the user manual.
ProGuard is fast. It processes small Android applications and entire runtime libraries in seconds.
ProGuard is the default tool in development environments like Oracle’s Wireless Toolkit, NetBeans, EclipseME, Intel’s TXE SDK and Google’s Android SDK.

Testimonials

"ProGuard is the ultimate Java obfuscator!"

P.S., IBM

"ProGuard is pure quality - powerful and trouble-free."

M.B., Statestep

"ProGuard rules. Much easier to use than the commercial alternatives."

B.G., Quiotix Corp

"ProGuard is a seriously sweet tool."

D.E., Google

"It is the simplest and most robust obfuscator we have ever used."

I.I., Hewlett-Packard

Get started with ProGuard

Download ProGuard

Download and contribute to ProGuard. You can submit bug reports, add feature requests and join the open discussions forum on our SourceForge page.

Download on SourceForge

ProGuard manual

All the information you need to set up ProGuard is detailed in the ProGuard manual. The manual is included in the ProGuard download and can also be consulted online.

ProGuard manual