What this tool helps with
Generate high-security random tokens for key drafts, user authentication, and sensitive data protection. Everything runs in your browser without upload or storage.
Recommended workflow
- 1Select Character Set - Choose from uppercase, lowercase, digits, and/or symbols
- 2Adjust Length - Use slider to set token length between 1-512 characters
- 3Click Generate - Create a secure random token in your browser
- 4Copy Token - Click copy button or hover over result area to copy to clipboard
Capability details
- Secure randomness - Uses your browser's secure random capability, not ordinary random numbers
- Customizable Charset - Mix uppercase, lowercase, digits, and symbols as needed
- Length Control - Support 1-512 characters with real-time entropy calculation
- One-click Copy - Instantly copy generated tokens with visual feedback
- 100% Client-side - Data never leaves your device, zero server dependency
- Entropy Display - Shows per-character entropy and total bit strength in real-time
Practical use cases
- API Key Generation - Generate secure API keys for service authentication
- CSRF Token Creation - Produce unpredictable anti-CSRF tokens for web forms
- Password Reset Tokens - Create one-time-use reset links with high entropy
- Session Identifiers - Generate unique session IDs for state management
- Encrypted Random Numbers - Produce seed values for cryptographic operations
Privacy, rights, and limits
Most processing is designed to run in the browser whenever possible, which makes the tool useful for quick personal or work files. For sensitive, production, or regulated material, test with a sample first and confirm the target platform's format, size, and quality requirements.
Common questions
How is this different from a regular random number generator?
It uses the browser's secure random capability instead of ordinary random numbers, making it more suitable for accounts, key drafts, and sensitive workflows.
Is my data sent to any server?
No. Generation happens entirely in your browser. No token is transmitted to or stored on a server.
What length should I use for an API key?
For most API key use cases, 32-64 characters with all character types enabled provides sufficient entropy (>190 bits). For high-security scenarios like encryption keys, use 128+ characters.