Password Generator
Generate cryptographically strong random passwords with configurable length and character classes.
Click Generate…
Results are estimates for general information only and are not professional financial, medical, tax, or legal advice. Read the full disclaimer.
How it works
Entropy (bits) = length · log2(alphabet size). 128+ bits is very strong.
16-character password with all classes → ~104 bits of entropy.
Frequently asked questions
- How long should a password be?
- 16+ characters with mixed classes is a good baseline.
- Are these truly random?
- Uses the Web Crypto API in-browser — no server sees them.
- Should I reuse passwords?
- Never — use a password manager to keep them unique.
- Symbols vs longer length?
- Length usually beats symbols for total entropy.
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