Security Tools
Password checkers, header generators, and security configuration tools.
Password Strength Checker
Check password strength with entropy calculation and estimated crack time.
Robots.txt Generator
Build a robots.txt file with allow/disallow rules for search engine crawlers.
CORS Header Generator
Generate the correct Access-Control headers for your API with a visual builder.
CSP Header Builder
Build a Content-Security-Policy header by toggling sources for each directive.
.htaccess Generator
Generate .htaccess rules for redirects, caching, security headers, and more.
AES Text Encryptor
Encrypt and decrypt text using AES-256-GCM directly in your browser with SubtleCrypto.
File Hash Calculator
Calculate MD5, SHA-1, SHA-256, and SHA-512 hashes of any file β processed locally.
TOTP Code Generator
Generate time-based one-time passwords (TOTP) compatible with Google Authenticator.
Random Key Generator
Generate cryptographically secure API keys, secrets, and tokens with custom length and charset.
Regex ReDoS Detector
Analyze regular expressions for catastrophic backtracking (ReDoS) vulnerabilities.
SSL Certificate Decoder
Parse and decode PEM-format SSL/TLS certificates.
JWT Claims Validator
Validate JWT token claims including expiry and issuer.
HMAC Generator
Generate HMAC signatures from message and secret key using SHA-256/384/512.
RSA Key Pair Generator
Generate RSA-2048 or RSA-4096 key pairs in PEM format.
Secure Passphrase Generator
Generate memorable Diceware-style passphrases with entropy estimation.
OpenSSL Commands Reference
Common OpenSSL commands for certificates, keys, and encryption.
Base32 Encoder / Decoder
Encode and decode text using Base32 encoding.
PBKDF2 Hash Generator
Generate and verify PBKDF2-SHA256 password hashes in your browser.
Text Entropy Calculator
Calculate Shannon entropy and bits-per-character of any text.
Hash Identifier
Identify the type of a hash string β MD5, SHA-1, SHA-256, bcrypt, and more.
Password Policy Tester
Test passwords against configurable policy rules: length, complexity, forbidden words.
Certificate Expiry Calculator
Calculate days until SSL/TLS certificate expiry and track multiple certificates.
2FA Backup Code Generator
Generate cryptographically secure two-factor authentication backup codes.
CORS Policy Tester
Test and debug CORS configurations with simulated browser scenarios.
Firewall Rule Generator
Generate firewall rules for iptables, UFW, macOS pf, and Windows Defender Firewall.
Password Expiry Calculator
Calculate password expiry dates based on your security policy and get alerts for expiring passwords.
SSL/TLS Reference
SSL/TLS versions and cipher suites reference with security status.
CVE CVSS Calculator
Calculate CVSS v3.1 Base Score for vulnerability severity assessment.
PGP Key Generator
Generate RSA or ECC OpenPGP key pairs for email encryption and digital signatures.
DNS Security Reference
Comprehensive DNSSEC and DNS security best practices reference including record types, attacks, and DoH vs DoT comparison.
OTP Generator
TOTP/HOTP one-time password generator.
SSL Certificate Decoder
Decode SSL/TLS PEM certificates.
Password Policy Generator
Generate password policy rules and validation regex for your application.