Password Generator
Generate cryptographically strong random passwords with configurable length and character classes.
Click Generate…
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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