Crypto
Password Strength Analyzer
Explore how length, character classes, and obvious patterns affect this local score without treating it as a security certification.
About this tool
When to use it
Explore how length, character classes, and obvious patterns affect this local score without treating it as a security certification.
How to use it
Use a made-up sample, inspect the score and individual checks as you type, and compare a short predictable string with a longer one. The show/hide control changes visibility only. Avoid using a score as the sole account-password policy.
Guide updated . Examples checked against this implementation.
Worked examples
An obvious password pattern
Input
passwordExpected output
Very weakThe small built-in common-password check recognizes this string. The tool does not query a breach database or know whether a password has been reused.
Errors and unsupported input
A predictable phrase gets a high scoreTreat the result as a checklist, not a guess-resistance estimate. The heuristic cannot model every dictionary phrase, reuse pattern, or attacker strategy.
Continue this workflow
- Token Generator: Generate random test tokens instead of inventing predictable identifiers.
Questions
Frequently asked questions
Does Very strong mean the password is safe to reuse?
No. The tool has no knowledge of accounts, leaks, or reuse. Its label describes only these local heuristic checks.