Random String Generator
Generate cryptographically random strings with custom length and character sets. Free, no signup, works in your browser.
Generated using crypto.getRandomValues() in your browser. No data is sent to any server.
About Random String Generator
This tool generates cryptographically secure random strings using the Web Crypto API (crypto.getRandomValues). Choose from lowercase, uppercase, digits, hexadecimal, or special characters. Configure the string length (1–256), generate multiple strings at once, and add custom prefixes or suffixes. Use it for API keys, test data, session tokens, nonce values, or any scenario requiring random text.
Frequently Asked Questions
Are these strings truly random?
Yes. The generator uses crypto.getRandomValues(), which is a cryptographically secure pseudo-random number generator (CSPRNG) built into your browser. It's suitable for security-sensitive applications.
What is the difference between this and a password generator?
Both use secure randomness, but this tool focuses on developer use cases — generating test data, API tokens, hex strings, and strings with custom prefixes/suffixes. It can generate multiple strings at once and supports hex-only output.
Can I generate UUID-like strings?
For standard UUIDs, use our UUID Generator. This tool is better for custom-format random strings where you control the length, character set, and prefix (e.g., 'sk_live_' + 32 hex characters).