Knowledge Base

Answers and Guides

How to Create or Join a CTF Team on CTFtime

CTFtime lets you create a new team from the "Create new team" link in its main navigation, and it lets you browse existing teams …

What Are CTF Writeups on CTFtime and How Can They Help You Learn?

CTF writeups on CTFtime are public, post-event solution notes written by players or teams, and they are most useful when you trea…

How to Find Upcoming CTF Events on CTFtime

Open ctftime.org and use the Upcoming events section on the homepage to see what's next, or go to the Calendar page for a month-b…

How CTFtime Calculates Team Ratings

CTFtime does not publish a public formula for its team ratings, so the exact math is not something you can reproduce from the sit…

What is CTFtime.org?

CTFtime.org is a community-run hub for Capture The Flag (CTF) competitions. It aggregates upcoming, running, and past CTF events,…