Strong Password Generator
Generate strong random passwords or passphrases with your browser’s secure random generator, with an entropy strength meter.
- Free
- No sign-up
- Runs in your browser
- Web & Developer
About the Strong Password Generator
Choose length and character sets or switch to passphrase mode. Passwords are created on your device and never sent anywhere.
How it works
Uses crypto.getRandomValues with rejection sampling (no modulo bias). Entropy = length × log2(pool size).
Frequently asked questions
How long should a password be?
At least 14–16 random characters, or a 5–6 word passphrase, and a different one for every site.