Cybersecurity Tools
Free tools for security professionals and developers. All tools run in your browser without sending data to external servers.
Password Analyzer
Analyze password strength with entropy calculation, common pattern detection, and estimated crack time.
SecurityHash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes for any text.
SecurityJWT Decoder
Decode and inspect JWT tokens. View header, payload, and signature information.
SecurityBase64 / URL Encoder
Encode and decode text using Base64 and URL encoding.
DevelopmentJSON / YAML Formatter
Format, validate, and convert between JSON and YAML.
DevelopmentSubnet Calculator
Calculate network addresses, broadcast, host range, and wildcard mask from CIDR notation.
NetworkCron Builder
Build and decode cron expressions with visual schedule preview.
DevelopmentSSL Checker
Check SSL/TLS certificates for any domain. Certificate details, expiry, and chain info.
ServerHTTP Headers Checker
Analyze HTTP security headers for any website and get recommendations.
ServerDMARC / SPF Checker
Check DMARC and SPF DNS records for any domain for email security.
ServerDNS Lookup
Query DNS records for any domain: A, AAAA, MX, TXT, NS, CNAME, SOA.
Server