Web Tools
Password Generator
Generate cryptographically secure passwords with configurable length, character sets, and strength analysis. Uses crypto.getRandomValues() for true randomness. Runs entirely in your browser — your data never leaves your machine.
password secret generator security crypto random developer-tools
Published May 28, 2026
All interactive tools run entirely in your browser. Your data never leaves your device.
How It Works
Configure the character sets (uppercase, lowercase, digits, symbols) and desired length, then generate passwords instantly. Each password is created using crypto.getRandomValues() for cryptographically secure randomness. The strength meter shows entropy in bits — higher entropy means a harder-to-crack password.
Features
- Cryptographic randomness: uses
crypto.getRandomValues(), notMath.random() - Configurable: choose length (4-128) and which character sets to include
- Strength meter: real-time entropy calculation with visual indicator
- Bulk generation: generate 5 passwords at once for quick selection
- Copy: one-click copy for each generated password
- Private: runs entirely in the browser — no passwords are ever transmitted
Strength Guide
| Entropy | Rating | Typical Use |
|---|---|---|
| < 40 bits | Weak | Avoid — easily brute-forced |
| 40-59 bits | Fair | Low-security accounts |
| 60-79 bits | Strong | General-purpose accounts |
| 80+ bits | Very Strong | Sensitive systems, API keys |
Use Cases
- Generating secure passwords for developer accounts and services
- Creating API keys and secret tokens for applications
- Generating random strings for test data and fixtures
- Quick passphrase creation for team-shared credentials