Password Strength Checker
Estimate how long a password would resist guessing.
Input
This tool runs entirely in your browser. The data you paste or load is never uploaded.
Result
Enter your input, then run the tool.
About this tool
Rates a password by length, character variety and entropy, flags common passwords, repeats and keyboard sequences, and estimates the time an offline attacker would need. The check runs entirely in your browser and nothing is stored.
How to use it
- Type or paste the password to test.
- Read the score, the estimated cracking time and the warnings.
- Follow the suggestions, or generate a new one with the password generator.
Frequently asked questions
Is it safe to type my real password here?
The check runs locally and nothing is sent or saved, but the safest habit is to test a password of the same pattern rather than the real one.
How is the cracking time estimated?
From the entropy of the character set and length, assuming ten billion guesses per second against a fast hash. Detected patterns lower the score.
Keep going
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