Fernflower vs Charlotte: 2026 Comparison
Fernflower is a free offensive security tool. Charlotte is a free offensive security tool. Compare features, ratings, integrations, and community reviews side by side to find the best offensive security fit for your security stack.
CST VerdictBased on our analysis of available product data, here is our conclusion:
Java security teams doing threat intelligence or incident response will get immediate value from Fernflower because it decompiles obfuscated bytecode faster than commercial alternatives and costs nothing. The 4,200 GitHub stars reflect adoption by real practitioners who need to reverse-engineer malware or audit third-party libraries without licensing overhead. Skip this if you need a GUI or automated vulnerability scanning; Fernflower is CLI-first and analytical, not a replacement for SAST tools.
Red teamers and penetration testers who need reliable shellcode execution without triggering EDR will find Charlotte indispensable; its C++ implementation and undetected status across major security stacks give you consistent command execution where batch scripts and PowerShell fail. The 979 GitHub stars reflect active maintenance and real-world validation from operators who depend on it. This is not for blue teams or organizations evaluating defensive tools; Charlotte is purpose-built for offense and makes no attempt to hide that.
