About Secure Password Generator
Create strong, unguessable passwords locally in your browser using the cryptographically secure window.crypto.getRandomValues PRNG. Customize length, uppercase, lowercase, numbers, symbols, and exclude ambiguous characters.
Key Capabilities & Features
- Hardware-backed CSPRNG via window.crypto.getRandomValues
- Configurable length from 4 to 128 characters
- Independent toggles for uppercase, lowercase, numbers, and symbols
- Avoid ambiguous characters (O, 0, l, 1, I) option
- Real-time Shannon entropy calculation (bits) and brute-force crack time estimations
- 1-Click instant copy with security auto-clear option
How to Use Secure Password Generator
Configure Parameters
Select your desired password length (16+ characters recommended) and character set options.
Generate & Inspect
Click refresh to generate a new password and inspect its entropy score and crack time estimate.
Copy Securely
Click copy to place the password on your clipboard for your credential manager.
Privacy & In-Browser Execution Guarantee
Generated strictly inside your browser memory using hardware-backed cryptographic randomness. Never logged, cached, or transmitted across any network.
Frequently Asked Questions
Are passwords generated by NEOKYRU sent to any server?
No. The password generator executes 100% locally in your browser using the W3C Web Cryptography API. Zero data leaves your device.
Why is window.crypto better than Math.random()?
Math.random() is pseudo-random and predictable. window.crypto.getRandomValues uses cryptographically secure entropy collected from your hardware and OS kernel, making outputs mathematically unpredictable.
What makes a password truly unbreakable?
Length is the single most important factor. A 16+ character password with mixed uppercase, lowercase, numbers, and symbols requires billions of years to crack with modern GPU rigs.