SHA-1 Prefix Calculator
Computes the SHA-1 prefix locally; it does not query any breach database.
k-Anonymity SHA-1
No database is queried; only the 5-character prefix used in k-anonymity lookups is computed locally.
Related tools
- Password GeneratorCryptographically random passwords with rules for upper- and lowercase letters, digits and symbols.
- Strong Password GeneratorLong random passwords for master passwords and critical accounts; 20+ characters recommended, with adjustable length and character types.
- Passphrase GeneratorMemorable passphrases made of words picked at random, without repetition, from a Turkish or English word list.
- PIN GeneratorRandom numeric PINs with rules for repeated and sequential digits; digits can be excluded.
- Password Strength CheckerRates how guessable a password is with the zxcvbn pattern model; it does not claim an exact cracking time.
- Password Entropy CalculatorComputes the theoretical upper bound of the search space from the character pool size and length.
- Password Policy CheckerChecks a password against a local policy (length and character rules); not a certificate of compliance with any standard.
- Password Hash VerifierChecks whether text matches an MD5, SHA-1 or SHA-256 hash, or an encoded bcrypt, Argon2, scrypt or PBKDF2 hash.