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Generate random strings with custom length and character sets for test data, tokens, and IDs.
Generate placeholder text, random strings, and compare plain text quickly.
When you need unpredictable, collision-resistant strings for sessions, tokens, secrets, or test seeds, the Random String Generator gives you configurable output — length, character set, quantity — generated entirely in-browser with no transmission.
For cryptographic use (tokens, salts, secrets), ensure your environment uses crypto.getRandomValues() under the hood rather than Math.random(). Purely statistical randomness is not sufficient for security-sensitive applications.
Need structured identifiers instead? Try the UUID Generator for RFC 4122-compliant IDs.
Browser-based generators using crypto.getRandomValues() produce cryptographically secure randomness. Math.random()-based ones do not.
Alphanumeric (a-z, A-Z, 0-9) avoids URL encoding issues. Add special characters only for systems that support them.
32 characters provides 192 bits of entropy for most alphanumeric sets — sufficient for session tokens and API keys.
Check out our technical guides to learn more about how browser-side processing works.
Read Glossary