JS-Confuser vs Tigress

JS-Confuser obfuscates JavaScript to make source code harder to understand, copy, reuse, or modify while preserving its functionality. Its browser playground accepts pasted code, lets users choose settings, and produces a downloadable result. The playground runs in the browser, including offline, and says it does not send code or actions to a remote server. Users can start with Low, Medium, or High presets or create custom configurations. Options include renaming variables, concealing strings, flattening control flow, inserting dead code, setting domain or date locks, and tamper protection. The API offers JSConfuser.obfuscate for source code and JSConfuser.obfuscateAST for Babel ASTs; output targets include Browser and Node.js. The editor includes Prettier and a JSON representation of JSConfuser.ts settings. JS-Confuser is described by its maker as free and open source. Obfuscation can increase file size and performance overhead or break a program, and it cannot prevent determined reverse engineers from recovering code or sensitive information. Tamper protection requires eval and non-strict mode.

Tigress is a C obfuscator that changes source code to make static and dynamic reverse engineering harder. Users choose sequences of command-line transformations and options; one input program can produce multiple distinct outputs. Its transformation families cover control flow, data, functions, integrity, and anti-analysis. Tigress supports C99 and targets Linux, Darwin, Android, and Windows, as well as Intel, ARM, and WebAssembly, with 32- and 64-bit output. It supports GCC, Clang, Emscripten, and cl, and cross-compilation can be configured through compiler and environment options. Input must be a single C file, so multi-file programs need to be merged first. The maker offers it free to nonprofit organizations at free. Commercial use in a for-profit organization requires a license from the University of Arizona; pricing is on request, and users may try it for any length of time before deployment. The source is not generally open source. The maker notes that generated code may be slow, particularly for huge programs, and advises assessing security needs before using software-protection techniques.