JOHLEM

security tools & cheatsheets

Free resources for security professionals.

66 tools and 110 cheatsheets.

what's new

2026-02-22 Added SIEM Query Template Library (30 templates for QRadar AQL, Splunk SPL, Microsoft Sentinel KQL)
2026-02-21 Added share & copy link buttons to all tools
2026-02-21 Added Engagement Scoper tool
2026-02-21 Added Compliance Reference Database (NIST, DORA, GDPR, NIS2, CRA)
2026-02-21 Added SecOps Response Generator with 100+ templates
2026-02-21 Added IP Geolocation & Privacy Checker tool
2026-02-21 Added ASCII Banner Generator tool
2026-02-21 Added WHOIS Lookup tool
2026-02-21 Added Email Security Checker (SPF/DKIM/DMARC)
2026-02-21 Added Encoding Detector tool
2026-02-21 Added Hash Identifier tool

100% free — no registration, no ads, no tracking.

Designed for practical daily work. CLI-friendly outputs when possible.

Got a suggestion? Get in touch — I'm always looking to improve.

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