Free Cybersecurity & OSINT Directory
Enterprise-grade security diagnostics, domain WHOIS lookups, global DNS resolution, network port audits, and anti-spoofing checks. 100% free with no registration required.
Featured Flagship Tools
Email Security Suite
SPF, DKIM, DMARC & BIMI deliverability audit
CSP Visual Evaluator & Builder
CSP header builder & XSS filter validator
JWT Security Auditor
Decode & test weak HMAC secrets & algorithm flaws
Google Dork Builder & OSINT Studio
Construct OSINT search queries & dorks
IOC Defang & STIX Studio
Sanitize URLs/IPs & export to STIX 2.1
Sigma & YARA Studio
Convert Sigma rules to Splunk/Elastic & validate YARA
Linux Hardening Generator
CIS Benchmark Bash script generator
TLS Hardening Studio
Mozilla SSL config rule generator
MITRE ATT&CK Explorer
TTP matrix explorer & detection mapper
Browser Security Studio
HTTP response header auditor & grader
Popular Security Tools
Email Security Suite
Unified anti-spoofing audit pipeline. Validate SPF 10-lookup limits, DKIM records, DMARC enforcement policies, BIMI branding, and MX mail server TLS configurations in a single browser-side check.
CSP Visual Evaluator & Builder
Design, test, and validate Content Security Policy headers to mitigate Cross-Site Scripting (XSS) and clickjacking attacks.
JWT Security Auditor
Audit JSON Web Token structures, check signature algorithms, detect algorithm confusion risks, and test HMAC secret strength privately.
Google Dork Query Builder & OSINT Studio
Construct targeted search operator dorks for security audits, shadow IT discovery, and passive asset reconnaissance.
IOC Defang & STIX Studio
Sanitize malicious indicators of compromise (URLs, IPs, emails) for safe sharing in SOC reports and incident documentation.
Sigma & YARA Studio
Translate open-source Sigma detection rules into Splunk, Elastic, and Sentinel queries automatically.
Email Security Suite
Unified anti-spoofing audit pipeline. Validate SPF 10-lookup limits, DKIM records, DMARC enforcement policies, BIMI branding, and MX mail server TLS configurations in a single browser-side check.
CSP Visual Evaluator & Builder
Design, test, and validate Content Security Policy headers to mitigate Cross-Site Scripting (XSS) and clickjacking attacks.
JWT Security Auditor
Audit JSON Web Token structures, check signature algorithms, detect algorithm confusion risks, and test HMAC secret strength privately.
Google Dork Query Builder & OSINT Studio
Construct targeted search operator dorks for security audits, shadow IT discovery, and passive asset reconnaissance.
IOC Defang & STIX Studio
Sanitize malicious indicators of compromise (URLs, IPs, emails) for safe sharing in SOC reports and incident documentation.
Sigma & YARA Studio
Translate open-source Sigma detection rules into Splunk, Elastic, and Sentinel queries automatically.
Linux Hardening Generator
Construct automated Bash hardening scripts for Ubuntu, Debian, and RHEL server baselines.
TLS Hardening Studio
Construct Mozilla-compliant TLS 1.2 and 1.3 web server encryption configurations.
MITRE ATT&CK Explorer
Browse enterprise adversary tactics, techniques, and procedures (TTPs) mapped directly to defensive detection rules.
Browser Security Studio
Inspect HTTP response headers for Content-Security-Policy, HSTS, X-Frame-Options, and X-Content-Type-Options.
WHOIS Lookup
Query official domain registration records, registrar details, creation dates, expiration deadlines, and nameservers.
Port Scanner
Audit network interfaces to detect open TCP ports, running services, and potential entry points.
SSL Certificate Checker
Inspect HTTPS certificate validity, expiration dates, issuing Certificate Authority (CA), SAN domains, and TLS ciphers.
DNS Lookup
Query A, AAAA, MX, TXT, CNAME, NS, SOA, and CAA records across global authoritative DNS servers.
HTTP Security Headers
Inspect HTTP response headers for Content-Security-Policy, HSTS, X-Frame-Options, and X-Content-Type-Options.
Subdomain Finder
Perform passive subdomain enumeration using Certificate Transparency logs and public asset intelligence.
Technology Detector
Analyze web application headers, HTML DOM footprints, and JavaScript variables to uncover the underlying tech stack.
IP & ASN Intelligence
Query IP addresses for Autonomous System Numbers (ASN), BGP network range, ISP owner, country location, and threat reputation.
Vulnerability Scanner
Run automated passive diagnostics to uncover missing security headers, outdated SSL protocols, and exposed administrative paths.
Featured Toolkits & Collections
OSINT & Reconnaissance Suite
Complete open-source intelligence pipeline for mapping digital footprints, registrar records, and public attack surfaces.
Blue Team Defense & Hardening Suite
Defensive auditing kit to harden infrastructure, enforce DMARC policies, and eliminate security regressions.
SOC Analyst Triage Suite
Security Operations Center suite for quick alert triage, port exposure checks, and threat reputation analysis.
Why Use ReconShield Cybersecurity Utilities?
ReconShield utility tools operate passively to perform non-intrusive security audits across public DNS records, registrar disclosures, SSL/TLS handshake chains, and HTTP header configurations.
100% Free & Client-First
No subscriptions, usage paywalls, or mandatory sign-ups. Access full diagnostic telemetry instantly.
Passive & Non-Intrusive
All scans are executed passively using open OSINT data sources and public endpoints, creating zero server load on targets.