Random String Generator
Generate cryptographically secure random strings for passwords, API keys, tokens, and other security purposes.
Generation Options
Random String Generator
Generate cryptographically secure random strings.
🎲 About Random Strings
Generate cryptographically secure random strings using the browser's crypto API. Perfect for passwords, API keys, and tokens.
- API keys and access tokens
- Password generation
- Session identifiers
- Nonces and salt values
- Temporary file names
Security Features
Cryptographically Secure
Uses crypto.getRandomValues() for true randomness
Not predictable with pseudo-random algorithms
Suitable for security-sensitive applications
Customizable Character Sets
Letters Only: A-Z, a-z (52 characters)
Alphanumeric: Letters + 0-9 (62 characters)
With Symbols: Letters + numbers + special chars (94 characters)
Common Use Cases
API Development
Password Generation
Session Management
File and Resource Naming
Security Recommendations
Length Guidelines
| Use Case | Minimum Length | Recommended |
|---|---|---|
| Passwords | 12 characters | 16+ characters |
| API Keys | 32 characters | 64+ characters |
| Session Tokens | 32 characters | 40+ characters |
| CSRF Tokens | 24 characters | 32+ characters |
| Temporary Files | 8 characters | 12+ characters |
Character Set Recommendations
High Security: Include symbols for maximum entropy
URLs/Filenames: Letters + numbers only (avoid special chars)
User Passwords: Balance security with usability
API Keys: Letters + numbers (easier to handle)
Storage Security
Browser Compatibility
This tool uses crypto.getRandomValues() which is supported in:
All modern browsers (Chrome 11+, Firefox 21+, Safari 3.1+)
Node.js environments
Mobile browsers
Web Workers
Fallback: If crypto.getRandomValues() is unavailable, the tool uses Math.random() with a security warning.
