Open access
No account is needed for public tools.
3kill / cybersecurity intelligence
See the signal.
See the signal.
Understand the risk.
Independent intelligence for your public attack surface. Inspect the systems, protocols, and exposure points that shape your security posture.
49 focused utilitiesNo account requiredPrivacy by default
01
Visibility
Reveal the public signals exposed by systems and services.
02
Verification
Test configurations against practical defensive standards.
03
Action
Turn findings into clear, focused remediation steps.
Intelligence domains
Explore the attack surface.
Focused tools for understanding the technical signals that matter—organized by the systems defenders work with every day.
012 utilities→027 utilities→039 utilities→04Email
8 utilities→055 utilities→065 utilities→072 utilities→089 utilities→092 utilities→
View all 49 security tools →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
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.