NIST Password Policy Checker

Check 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 role

Minimum length

Maximum supported

Composition rule

Periodic forced rotation

Blocklist at creation/change

Password manager/autofill

Paste

Spaces

Unicode

Full password verified

—Based on NIST SP 800-63B Revision 4 password-verifier guidance. This tool is not a compliance certification.

Sensitive values stay in this browser page. Theoretical entropy/search-space math assumes uniform random generation and is not a crack-time promise for human-chosen passwords. Use a reputable password manager for real account storage.

How to use this NIST Password Policy Checker

Review a password policy configuration against current NIST SP 800-63B guidance. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.