Open access
No account is needed for public tools.
Cybersecurity intelligence
See the signal.
See the signal.
Understand the risk.
Inspect your public attack surface.
Understand the signals that shape your security.
Intelligence, on demand.
49 utilities 9 categories
Cryptography
Password, hash & HMAC
Cybersecurity
CVSS & defense guides
DNS
Records, DNSSEC & propagation
SPF, DKIM & DMARC
IP Address
Inspect, locate & classify
Network
Ports, CIDR & diagnostics
SSL / TLS
Certificates & configuration
Website
Headers, CSP & trackers
QR Codes
Generate & share
01
Visibility
Reveal the public signals exposed by systems and services.
02
Verification
Inspect configurations and understand what needs attention.
03
Action
Turn findings into clear, focused remediation steps.
Operating principlesUseful by design.
Useful by design.
Private by default.
Cybersecurity knowledge should be practical and accessible. 3kill provides focused tools that answer a question, clarify exposure, and stay out of your way.
Local first
Browser processing is used whenever practical.
Clear evidence
Results favor useful context over unnecessary complexity.
Defensive use
Every utility is built for responsible security work.
Field notes
Questions, answered.
Why are the cybersecurity tools free?
Security fundamentals should be accessible. These utilities help people inspect and strengthen infrastructure without adding another account or subscription.
Will more tools be added?
Yes. We continue to add practical cybersecurity and infrastructure tools, with guidance explaining how to use them safely.
Do you provide consulting?
Yes. Email support@3kill.com with a brief description of what you need.