Validation

Validate Semantic Versioning 2.0.0 version numbers (x.y.z-alpha.1 format)

Cryptography

Generate Scrypt hash from password

Cryptography

Validate password against Scrypt derived key

Security

Generate cryptographically secure one-time numeric codes (SMS / email verification, raffle codes, event pins) with configurable length (3-10 digits), bulk output, optional ambiguous-digit exclusion, and an optional expiry countdown. Uses crypto.randomInt, not Math.random.

Security

Estimate real password strength with Shannon entropy, zxcvbn pattern matching (l33t, dictionary, sequences, repeats) and brute-force crack-time across attack scenarios (offline fast/slow hash, online). The password is evaluated locally and never sent anywhere.

Validation

Validate OpenAPI 3.0/3.1 and Swagger 2.0 documents structurally: required fields, path/operation completeness, response codes, $ref resolution, operationId uniqueness, and component integrity

Security

Scan one or more regex patterns for catastrophic backtracking risk, simulate evil inputs, and suggest safer rewrites

Validation

Validate passport numbers from different countries (China, USA, Japan, etc.)

Security

Generate secure random passwords

Cryptography

Generate PBKDF2 key derivation hash

Cryptography

Validate password against PBKDF2 derived key

Security

Validate password strength and check against common security requirements