Chartixo
Everyday Tools

Password Generator

Generate strong, random, and cryptographically secure passwords with entropy and strength indicators.

Generated Secure Password
2qM{20I1#,lL(CV[
Strength: Very Strong (103 bits entropy)16 characters
Password Length16
Runs 100% locally in your browser. Zero data transmission.

How It Works & Underlying Concept

Strong passwords protect digital accounts from brute-force and dictionary attacks. Using a long, randomly generated password with high entropy ensures attackers cannot guess credentials using automated password-cracking software.

Mathematical Formula / RuleShannon Entropy (bits) = Length × log2(Character Pool Size). 80+ bits is considered very strong.
Quick Instructions
1Adjust the password length slider to your desired length (16+ recommended).
2Toggle which character types you want to include.
3Check 'Avoid ambiguous characters' if you need to read or type the password manually.
4Click 'Generate Password' and copy it to your clipboard.

Key Capabilities

  • Cryptographically secure randomness via window.crypto.getRandomValues
  • Customizable length from 6 to 64 characters
  • Toggles for uppercase, lowercase, numbers, and special symbols
  • Option to avoid ambiguous characters (like 0, O, 1, l, I)
  • Real-time Shannon entropy calculation and strength rating
Real-World Example

Securing a Banking or Cloud Account

A user needs a new password for their master password manager account.

Step 1:Set length to 20 characters.
Step 2:Enable uppercase, lowercase, numbers, and symbols.
Step 3:The generator calculates 130 bits of entropy with a 'Very Strong' rating.
Result: Generates an uncrackable password like 'j7#F9!mK@2vX$4pL&8qW'.
Technical Notes & Limits
  • Generated passwords are not stored anywhere; be sure to copy and save your password before closing the window.

Frequently Asked Questions

How long should a secure password be?▾
Cybersecurity guidelines recommend a minimum of 14 to 16 characters for critical accounts. Length provides more mathematical security against brute-force attacks than complexity alone.
Is this password generator secure?▾
Yes. It uses your browser's native cryptographic pseudo-random number generator (CSPRNG). No passwords are ever sent across the network or logged.

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