The easiest CTF 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 opinonated. 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


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 risk tampering with user data again.

CTFd is used by those big and small

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