Secure Random Password Generator - Custom
Protect your online profiles. Generate custom passwords with selective character types or create a memorable passphrase (xkcd style) with high local entropy.
Direct Answer / Definition
A password generator is a cryptographic utility that produces random sequences of characters or word combinations to prevent unauthorized account access.
Cryptographic Key Generator
Generate secure random passwords or memorable passphrases locally.
📋 Password copied to clipboard!
Entropy and Crack-Time Estimates
| Length | Character Sets | Entropy (bits) | Time to Crack (Brute Force) |
|---|---|---|---|
| 8 chars | Alphanumeric | ~47 bits | Few minutes to hours |
| 12 chars | Alphanumeric + Symbols | ~78 bits | Hundreds of years |
| 16 chars | Alphanumeric + Symbols | ~104 bits | Trillions of years |
| 4 words | Memorable Passphrase | ~51 bits | Decades to centuries |
Reference Specification: The National Institute of Standards and Technology (NIST) Special Publication 800-63B recommends length and entropy thresholds as the primary metrics for password complexity.
How to Use the Secure Random Password Generator - Custom
Choose either 'Random Password' or 'Memorable Passphrase' mode.
Adjust the length slider and select character check boxes.
Copy the generated password instantly to your clipboard.
⚡ Compliance & Security Guarantee
This execution gateway is fully sandboxed and compliant with standard information security guidelines, ensuring total regulatory transmission safety.
Frequently Asked Questions
Is it safe to generate passwords on this website?
Yes, absolutely. The generator runs completely offline inside your browser's execution thread using the cryptographically secure Web Crypto API (`window.crypto`). No data is sent to the internet.
What is a memorable passphrase?
Inspired by the famous xkcd comic, it chains random words together (e.g., 'correct-horse-battery-staple'). It is extremely hard for computers to guess but very easy for humans to remember.