The easiest Capture The Flag framework out there

Capture The Flags trained generations of the best hackers

CTFd makes it easy to run a CTF of your very own

We can help build your CTF for you too

Contact us to learn how


Clean and simple user interface

No clutter makes the default theme of CTFd a beauty without being opinionated. It works well for most events and if you want something a little more you, there’s custom theme support built right in!

CTFd was built for education at one of
the largest Capture The Flags ever

Register to deploy your own CTFd instance immediately


Control everything from the browser

All you need to use to run your very own Capture The Flag is a web browser. Just use the built in administration panel and never risk accidentally tampering with user data again.

CTFd is used by those big and small

vector csaw bugcrowd
  FireEye hackucf

Beautiful examples of CTFd in action