Random String Generator
Generate cryptographically random strings. All in your browser.
Try it with this example
Set length 32 and generate. Use it for API keys, tokens, or test data.
What is this tool?
The Random String Generator creates cryptographically random alphanumeric strings. Set the length and character set (uppercase, lowercase, numbers, symbols), and generate. Use the output for API keys, tokens, test IDs, or temporary passwords. Each string is unique and unpredictable. Uses the browser's secure randomness (crypto.getRandomValues). All generation runs client-side. No server, no storage. Your strings are generated and displayed locally—copy and use them elsewhere.
Configure length (e.g. 16, 32, 64) and which character sets to include. Alphanumeric only, or add symbols for stronger entropy. Avoid ambiguous characters (0/O, 1/l) if the string will be read by humans. For machine-only use, full character sets maximize randomness. Generate multiple strings with repeated clicks. Each is independent—no duplicates guaranteed, but with sufficient length and randomness, collisions are astronomically rare.
Use it when creating API keys for development. When generating session tokens or nonces. When seeding test databases with unique IDs. When you need a random slug or identifier. The Password Generator offers similar entropy with different defaults (optimized for human-use passwords); this tool is for machine-readable strings. Both use secure randomness.
Generated strings are shown in the browser. Copy and store them securely. The tool doesn't save or transmit them. For production secrets, use proper secret management; for dev keys and test data, this generator is quick and secure. Bookmark it for ad-hoc string generation.
Essential for tokens, keys, and test data.