Random String Generator
Professional Random String Generator
Random String Generator
Professional Random String Generator
Features
- Cryptographically secure random strings using crypto.getRandomValues — suitable for API keys, password seeds, salts, tokens
- Configurable length (1–512), character classes (lowercase, uppercase, digits, symbols), exclusions
- Bulk generation: 1–100 strings per click
- Common presets: API key, password, hex token, base64-friendly
- Optional prefix and suffix wrappers
How to use
- Enter your input data in the provided field.
- Configure any options as needed.
- View the results instantly and copy or download the output.
Tips & Best Practices
- crypto.getRandomValues is a CSPRNG (cryptographically secure) — suitable for secrets, salts, and tokens. Math.random is NOT.
- For passwords, prefer length over symbol-soup: 16 chars of [A-Za-z0-9] is stronger than 8 chars including symbols.
- For API keys, base64-friendly mode keeps the characters URL-safe and easy to copy.
- Tokens generated here are unique per call but not stored — copy yours immediately or regenerate.
- For server-side secret generation, prefer your platform's crypto library (openssl rand, secrets.token_hex, etc.) over a browser tool.
FAQ
Is this tool free to use?
Yes, completely free with no registration, no limits, and no hidden costs.
Is my data private?
All processing happens in your browser. No data is ever sent to any server or third party.
Does it work offline?
Once loaded, the tool works entirely offline. All processing is done client-side with JavaScript.
Which browsers are supported?
Works in Chrome, Firefox, Safari, Edge, and all modern browsers on desktop and mobile.
Can I use the results commercially?
Yes, all output is yours to use freely in any personal or commercial project without restrictions.