Security-focused tools for developers and analysts — generate hashes, compute HMACs, check password strength, encrypt text with classical ciphers, and validate card numbers, IBANs, and ISBNs. All processing is client-side.
Generate HMAC signatures using SHA-256, SHA-512, and other algorithms.
Check password strength against security criteria and estimate crack time.
Validate credit card numbers using the Luhn algorithm.
Validate and parse International Bank Account Numbers (IBANs).
Validate ISBN-10 and ISBN-13 numbers and convert between them.
Encode text to hexadecimal or decode hex back to text.
Encrypt and decrypt text using the Caesar (ROT-N) substitution cipher.
Encrypt and decrypt text using the Vigenère polyalphabetic cipher.