Useful Password & Passphrase Tools starting points

Jump into a common task, then use the full directory below for more specialized tools.

Password Combination Calculator Password Length Calculator PIN Generator Password Entropy Calculator Passphrase Generator Password Character Set Calculator

16 browser-local tools

Password & Passphrase Tools

Generate and review passwords, passphrases and policy requirements locally with modern security guidance.

Choose the security job first

separates password creation, policy review, integrity hashes, keyed authenticity, KDF verification and encryption/signature primitives so similarly named security concepts are not presented as interchangeable.

Generate credentials

Create random passwords, passphrases, PINs, batches, pronounceable strings, or recovery-code material.

Password GeneratorChoose the format you actually need, generate locally, and avoid reusing the result across accounts; a password manager and MFA are stronger workflow companions than memorizing many passwords.Passphrase GeneratorUse unrelated random words and sufficient length; do not turn a memorable phrase based on personal facts into a supposedly random passphrase.PIN GeneratorCreate multiple local random PINs and remember that real PIN security also depends on rate limiting and device protections.Batch Password GeneratorChoose length and character sets, then create up to 200 independent passwords using browser cryptographic randomness.Pronounceable Password GeneratorChoose syllable count and optional capitalization, digits, or symbols to create pronounceable random strings with browser cryptographic randomness.Recovery Code GeneratorChoose count and code length, generate browser-local codes, then copy or print them; the tool does not enroll codes into any account or service.

Review strength & requirements

Inspect length/common patterns and compare an entered value with explicit application requirements.

Password Strength CheckerThe checker keeps input in the browser, flags common local patterns, and emphasizes length, uniqueness, password managers, blocklists, and MFA rather than mandatory symbol recipes.Password Requirements CheckerTest custom minimum/maximum length and optional lowercase, uppercase, digit, symbol, or whitespace rules without transmitting the password.Password List Analyzer & DeduplicatorCount entries, duplicates, unique values, and length statistics, then export a deduplicated list; use only lists you are authorized to handle.Password Length CalculatorChoose an alphabet size and target bits to calculate the minimum uniformly random password length; this model does not estimate human-chosen password strength.

Design a policy

Translate modern length/blocklist/autofill/rotation guidance into a practical checklist instead of copying obsolete complexity folklore.

Password Policy BuilderChoose a deployment context and generate a copy-ready browser-local password policy checklist with explicit NIST/OWASP-oriented boundaries.NIST Password Policy CheckerCheck length, composition, rotation, blocklist, password-manager, paste, Unicode, and full-verification settings against NIST Rev. 4 guidance; this is a policy aid, not certification.Password Regex GeneratorChoose length and character-class requirements, generate the regex, then test a sample string. The regex validates syntax; it does not measure password strength.Password Combination CalculatorCompute alphabet^length exactly with BigInt and show theoretical bits for uniformly random independent character selection.Password Character Set CalculatorCombine lowercase, uppercase, digits, symbols, and optional custom characters and inspect the resulting unique character pool.Password Entropy CalculatorUse a uniform independent-draw model for random passwords; do not interpret the result as measured entropy or crack time for human-chosen passwords.

All Password & Passphrase Tools

Password & Passphrase Tools