Hacker101: learn web security through CTF challenges

www.hacker101.com

Hacker101 offers free web security classes for programmers interested in bug bounties and seasoned security professionals. The site brings together video lessons, guides, and other resources.

Its Capture the Flag (CTF) levels are inspired by real-world scenarios and let learners put their skills into practice.

Two people wearing black caps marked with the number 11 lean over a keyboard.