How it Works?

Join community of hackers and get ready to be a CTF Master!

Solve challenges in various categories and get your place in the leaderboard!

Submit challenges that you'd like to see on WTHack and contribute to the world of hackers!

Hi there! We removed all ads from our website and added Monero mining implementation in order to cover our expenses. Here we use a very very small computing power of yours (just around 1 minute) in the browser and pay our yearly expenses. (Hosting, domain etc.) You can contact us anytime at contact@onlinectf.com or you can also fill a form on http://onlinectf.com/contact/. Happy Hacking!