Capture flags. Build proof. Level up.
The CTF Arena turns security theory into hands-on missions. Solve flags, sharpen your methodology, track your growth, and earn proof when you complete a series.
arena.j77cyber
$ nmap -sV target
PORT STATE SERVICE
80/tcp open http
Flag clue found: /backup
Current run
420 pts
3 flags captured
Practice real attack paths
Work through web flaws, weak crypto, recon trails, files, binaries, and forensics without touching a live target.
Build proof of progress
Register to keep solved flags, points, completed series, and certificates tied to your profile.
Start easy, level up fast
Move from beginner wins into harder investigations as your process and confidence improve.
Challenge Coverage
Every flag teaches a useful security habit.
Cryptography
Decode, compare, brute force, and spot implementation mistakes.
Web Exploitation
Exploit realistic application bugs and broken access controls.
Forensics
Inspect packets, files, traces, and hidden evidence.
Reverse Engineering
Pull apart logic, scripts, binaries, and suspicious behavior.
Your next flag is waiting
Register once. Keep every solve.
Guest mode is good for a look around. A profile is where the Arena becomes yours: points, progress, certificates, and a record of what you can actually do.