crackmes.one
Download community crackmes and reverse engineer them
crackmes.one is a library of small programs, called crackmes, made to be reverse engineered. You download one, open it in a disassembler or debugger, and figure out the password, key or hidden logic. Some crackmes are auto-validated, so you can submit a flag and earn points.
Free · No login · Desktop · Intermediate
About crackmes.one
It trains reverse engineering on real binaries. Each crackme has a difficulty level, and the FAQ suggests newcomers start with difficulty 1. Members upload the crackmes and write the solutions, so there are thousands of both.
Downloads are free and come as password-protected archives. You need an account to upload crackmes, submit writeups or submit flags. Solvers of auto-validated crackmes can rate their quality, and the community chats on Discord.
On Breakpoint since 23 Oct 2026.