Hacking training made simple

on the best Capture The Flag platform

What's a Capture The Flag?
A simple challenge
Ask your users to program too!
Classic multiple choice questions

Build your own hacking workshop


Design your own questions. Understand where your students excel and where they might need to improve.

Creating light competition drives users to out-do one another on the public scoreboard and also ask each other about their approaches.


Track user progress with easy graphs


Visualize your users with their skill graphs.


With easy to use visualizations, you can quickly infer the state of a team without getting into the nitty gritty.

Easily add content and manage users


The administration panel gives you the ability to manage teams on the fly.


Send messages, edit team information, create new pages, add new challenges, and lots of other features are available to admins.


You can also customize CTFd with themes and plugins for infinite customizability on a rock solid base.

Managed hosting from $50 / month

Access our library of hacking problems

CTFd is free, open source software.

Install from source code

Some of our users