Secure Password Generator
Generate highly secure random passwords with customizable lengths and character sets. Estimate password entropy.
Create secure keys using cryptographically strong browser-native seeds
How to use this tool
Offline Randomness Security
All passwords are generated completely locally in your browser using the secure Web Crypto API. No data is sent over the internet, keeping your private credentials safe.
How to Build a Strong Password
Customize character sets and lengths to generate high-entropy security credentials.
Adjust Length
Select the password length (12 to 16 characters is recommended for most websites; 32+ for database passwords).
Select Requirements
Toggle character sets: uppercase, lowercase, numbers, and symbols. Combining sets dramatically increases difficulty for hackers.
Check Entropy
Review the password strength rating and copy your secure credentials.
Frequently Asked Questions
Understanding entropy and security keys.
What is password entropy?
Password entropy measures a password’s strength in bits based on length and character options. A password with 80+ bits of entropy is extremely difficult for brute-force systems to crack.
Does this tool save or store my passwords?
No. Once you close this window or refresh the page, the generated passwords vanish from browser memory. We have zero servers and keep no logs of any kind.
Privacy & Safety Policy
All tools run completely in your browser via client-side JavaScript. We do not upload your files, interest parameters, or JSON payloads to any server. Your data remains yours.