Generators & Security Scratchpads
Cryptographically secure passphrases, UUID v4 bulk builders, customizable QR codes, and meta social tags.
Secure Password & Passphrase Generator
Cryptographic entropy, character pool customization, and memorable passphrases
Security Settings
crypto.getRandomValues144 bits
> 100 Trillion Years
Mathematical Formula & Engineering Rules
Entropy (bits) = L × log2(N), where L = length and N = character pool size (e.g. 94 characters for full ASCII printable).
Worked Engineering Example
A 20-character password using letters, numbers, and symbols delivers ~131 bits of entropy, requiring billions of years to brute-force.
Frequently Asked Questions
Q1:
Explore Sibling Calculators
QR Code Generator
Custom URL and text QR code generator with SVG/PNG download
UUID Generator
Bulk generation of RFC 4122-compliant unique identifiers
Meta Tag Generator
HTML <head> tags and Open Graph / Twitter card snippets with real-time preview
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