Practical, no-fluff guides on OSINT, reconnaissance and cybersecurity — how to investigate a domain, read DNS records, enumerate subdomains, check breached passwords and more.
Worried your password is in a data breach? Learn how to check safely using k-anonymity — your password never leaves your device — with a free Pwned Password checker.
Read article →WHOIS is being replaced by RDAP. This free guide explains the difference, why it matters for domain research and OSINT, and how to look up either one online for free.
Read article →A practical, free guide to subdomain enumeration in 2026 — Certificate Transparency logs, DNS, and passive sources — plus a free online subdomain finder you can use right now.
Read article →A beginner-friendly guide to DNS records — what A, AAAA, MX, TXT, NS, CNAME and SOA mean, how to read them, and how to check any domain's DNS for free.
Read article →Learn how to trace a domain to its IP address, hosting provider, ASN and network owner using free public data — a practical OSINT pivoting guide.
Read article →Understand JSON Web Tokens (JWT): structure, header, payload, signature, and how to decode one safely in your browser — plus why you should never trust an unverified token.
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