libformatstr.py vs Liffy: Side-by-Side Comparison (2026)
Features, pricing, ratings, and pros & cons — compared head-to-head.
libformatstr.py is a free penetration testing tool. Liffy is a free penetration testing tool. Compare features, ratings, integrations, and community reviews side by side to find the best penetration testing fit for your security stack.
CST VerdictBased on our analysis of available product data, here is our conclusion:
Penetration testers who regularly target legacy C applications will move faster with libformatstr.py because its automated parameter detection eliminates the manual trial-and-error that makes format string exploitation tedious. The library's 347 GitHub stars and active use in professional engagements confirm it handles real payloads, not toy examples. Skip this if your work centers on modern memory-safe languages or you need something with a GUI; libformatstr.py is Python-first and assumes comfort reading code.
Penetration testers running manual assessments against legacy applications will find Liffy invaluable for LFI exploitation; it handles filter bypass and log poisoning chains that require tedious manual crafting. The 884 GitHub stars and active maintenance reflect adoption among red teams who need a focused, scriptable tool rather than bloated frameworks. Skip this if you're looking for a GUI-driven scanner or need coverage beyond file inclusion vulnerabilities; Liffy is deliberately narrow and expects operator skill.
