Random String
Generate random strings with custom length and character sets.
Random String Generator:
- Generate cryptographically suitable random strings
- Customize character types included
- Configurable length (up to 1000 characters)
- Generate multiple strings at once
- Perfect for passwords, tokens, IDs, keys
About Random String
Random String Generator creates cryptographically random strings of any length using a customizable character set — lowercase letters, uppercase letters, digits, symbols, or any combination. Use it to generate API keys, temporary passwords, session tokens, nonces, or test data. The generator uses the Web Crypto API for cryptographic-quality randomness.
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Frequently Asked Questions
Is Random String free?
Yes, completely free. No signup, no account, no usage limits. Use it as much as you need.
Is my data secure?
All processing happens directly in your browser using JavaScript. Your data is never sent to any server, stored, or shared. It stays entirely on your device.
Is the generated string cryptographically secure?
Yes. The tool uses window.crypto.getRandomValues(), which produces cryptographically secure random bytes suitable for tokens and secrets.
Can I exclude characters that look similar, like O and 0 or l and 1?
Yes. There is an option to exclude visually ambiguous characters, which is useful when generating strings that a human will need to read or type.