CTFtime — CTF calendar

Cybersecurity · Applications open · Organiser: CTFtime

CTFtime lists cybersecurity CTF competitions worldwide by date, format (Jeopardy, Attack-Defense) and weight. Teams appear in a global ranking with their results. Some finals are open only to pre-qualified teams.

Who can take part?

Most online CTFs are open to everyone; academic and on-site finals set their own rules.

How to prepare

Register the club team on CTFtime. Split roles across web, cryptography, reverse engineering and forensics.

Official page · All competitions

Last checked: 2026-10-25