Password Pattern Checklist
Spot basic weak password patterns locally, without sending a password anywhere.
Runs in your browser. Nothing you enter is sent to our servers.
Result
Enter your details and select Run tool.
How to use this tool
Type a candidate password to flag short length, repeated characters, common sequences and a handful of obvious password patterns. This is only a limited local checklist, NOT a professional password-strength estimator and NOT a breach lookup. Prefer unique random passwords from a password manager; never reuse credentials.
Questions and answers
Does this check whether my password appeared in a data breach?
No. No online lookup or network request is made.
If no warning appears, is the password safe?
Not necessarily. The tool only identifies a small number of obvious patterns. It cannot guarantee resistance to guessing or exposure.