Password Generator
Random · Passphrase · PIN
Generate secure random passwords, memorable passphrases, and PINs with entropy calculation, strength meter, and bulk generation. 100% client-side.
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📦 Bulk Generate
Why Use Our Generator
Cryptographically secure, zero tracking, three modes.
Crypto-Secure
Uses Web Crypto API (crypto.getRandomValues) — the gold standard for randomness.
Passphrase Mode
Generate memorable word-based passwords (Diceware-style) that are equally secure.
Entropy Calculator
See the exact bits of entropy and estimated crack time for every password.
Bulk Generate
Create up to 20 passwords at once. Copy individually or all at once.
100% Private
Everything runs in your browser. Nothing is ever sent to our servers.
Works Everywhere
Responsive design. Use on desktop, tablet, or mobile — even offline.
Complete Guide: How to Use the Password Generator
Generate cryptographically secure passwords using the Web Crypto API built into your browser. Choose from random character passwords, memorable passphrases (Diceware-style), or numeric PINs. Every password includes an entropy calculation and estimated crack time. Nothing is stored or transmitted — 100% client-side generation.
Step-by-Step Instructions
- 1
Choose a password type
Select 'Random' for traditional passwords with mixed characters, 'Passphrase' for memorable word combinations, or 'PIN' for numeric codes.
- 2
Configure your settings
Adjust length, toggle character types (uppercase, lowercase, numbers, symbols), or set the number of words for passphrases. The entropy updates in real-time.
- 3
Generate your password
Click Generate to create a new password. The entropy (in bits) and estimated crack time are shown — aim for 80+ bits for important accounts.
- 4
Copy or bulk generate
Copy your password to clipboard, or use Bulk Generate to create up to 20 passwords at once for batch account creation.
Common Use Cases
- ✓Creating strong unique passwords for each of your online accounts
- ✓Generating secure API keys and tokens for development projects
- ✓Creating Wi-Fi passwords that are secure but shareable
- ✓Generating memorable passphrases for master passwords (password managers)
- ✓Bulk generation for creating multiple test accounts in QA/testing
- ✓Creating secure PINs for devices, locks, and two-factor authentication
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Frequently Asked Questions
How does the password generator work?
Our generator uses the Web Crypto API (crypto.getRandomValues) — a cryptographically secure random number generator built into your browser. This is far more secure than Math.random(). It supports three modes: Random characters, Passphrases (Diceware-style word combinations), and PINs.
What makes a strong password?
A strong password has high entropy — at least 80 bits is considered good. This means it's long (16+ characters), uses diverse character types (uppercase, lowercase, numbers, symbols), and is truly random. Our tool shows the exact entropy in bits and estimated crack time.
What is a passphrase and is it secure?
A passphrase is a password made of random words (e.g., 'Brave-Lunar-Castle-River-439'). A 5-word passphrase typically has 60+ bits of entropy — comparable to a 10-character random password. They're easier to remember while still being very secure.
Is it safe to generate passwords online?
Yes! Our password generator runs entirely in your browser using the Web Crypto API. No passwords are sent to any server or stored anywhere. Everything happens locally on your device — you can even use it offline.
What is entropy and why does it matter?
Entropy is a measure of password randomness, expressed in bits. Higher entropy = harder to crack. A password with 40 bits of entropy has 2⁴⁰ (about 1 trillion) possible combinations. We recommend 80+ bits for important accounts and 100+ bits for critical security.
Can I generate multiple passwords at once?
Yes! Use the Bulk Generate feature to create up to 20 passwords at once. Each one is independently generated with full cryptographic randomness. You can copy them all or individually.