A hand-picked, category-wise collection of the best free cyber security learning — whether you are starting from zero, building skills for a job, or just want to keep yourself and your business safe online. Everything is explained in simple language.
Pick a category, or search for a topic like sqli, phishing, career or linux. New resources are added regularly.
This library is a great place to explore. When you want a clear path — step by step, with hands-on practice and a certificate you can show an employer — our Academy takes you the rest of the way. The founding batch is enrolling now.
We link to the resources we genuinely rate — some are ours, many are trusted names like OWASP, PortSwigger and MDN. Links marked to open in a new tab lead to other websites. If a link ever breaks, tell us and we will fix it.