Learn OSINT
Open-source intelligence (OSINT) is the practice of gathering information from publicly available sources — and it is far more powerful, and far easier to run against an ordinary person, than most people assume. These guides explain what OSINT actually is, how the main techniques work, where the ethical and legal lines sit, and how to start learning it responsibly.
What is OSINT?
What counts as open-source intelligence, where the data actually comes from, and why it matters to an ordinary person.
How OSINT techniques work
A conceptual walkthrough of infrastructure recon, username & email pivoting, metadata extraction, and breach data.
The ethics and the line you don’t cross
Consent, the difference between research and harassment, dual-use tools, and why the law depends on where you are.
Getting started responsibly
Practical first steps: profile yourself first, use a separate research environment, keep notes, and know when to stop.
Once you have the basics, see how findable you already are with How findable are you?, or browse the tools directory to see the software these techniques are built on.