Password Generator
Generate strong random passwords or memorable passphrases using cryptographically secure randomness in your browser.
Local processingPassword Strength Checker
About this tool
Enter a password to review its length, character variety, repeated patterns, common sequences, estimated entropy, and a rough estimate of how difficult it may be to guess. The password is not uploaded or checked against an online database.
Features
- Strength rating
- Length and character-variety checks
- Warnings for common sequences and repeated patterns
- Estimated entropy
- Suggestions for improving the password
How to use
- Enter password: Type or paste the candidate password in the secure field.
- Read analysis: Review entropy, length, character variety, and warnings.
- Apply suggestions: Lengthen or diversify based on feedback—not mandatory rules.
Examples
- Check a password before using it for a new account
- Compare a passphrase with a shorter password
- Explain why length and unpredictability matter
- Review a password before saving it in a password manager
Limitations
- Time-to-guess estimates are approximate and cannot predict a targeted attack
- The tool does not check whether the password appears in a known data breach
- The results are generated directly in your browser and are not sent to a server.
FAQ
- Is my password stored?
- No. Analysis runs in your browser and clears when you leave the page.
- Why does a long passphrase score well?
- Entropy grows with length and unique symbols; passphrases with many random words can exceed short complex passwords.
- Does it detect keyboard walks?
- Common sequences like qwerty or 123456 reduce the score through common-pattern detection.