Tools
Cybersecurity Tools Tools
680 free tools · No signup, no limits, no cost.
Turn CIDR notation into the exact IP range it covers
Score a vulnerability with the official CVSS v3.1 base metrics
Email authentication audit · policy explainer · 9 common DKIM selectors
A / AAAA / MX / TXT / CNAME / NS / SOA via Cloudflare DoH (1.1.1.1)
CIDR + mask + broadcast + usable hosts + RFC 1918 detection
Expand, compress and subnet any IPv6 address
Memorable, strong passphrases — generated in your browser
zxcvbn-style entropy + crack-time at 4 attack profiles · browser-only
Vet AI agent skills before enterprise deployment — built by ThreatBook
Open-source, locally deployed Agentic SecOps platform — 7 specialist agents, 150+ tools, autonomous from day one
Free cyber threat intelligence portal — IP, domain & file verdicts with APT attribution and an AI co-pilot
Free, open-source honeypot platform — 40+ deception environments, one console, native ThreatBook intelligence