Random String Generator β secure tokens & keys
Generate cryptographically secure random strings and tokens with custom length and character sets, all in your browser.
π Runs entirely in your browser. Your input and output are never sent to a server or stored β fully private.
Crypto-secure tokens, generated in your browser. Click any to copy.
About this tool
Generate random strings, tokens and keys of any length using your browser's cryptographically secure random generator (crypto.getRandomValues). Choose which character sets to include β uppercase, lowercase, digits and symbols β and copy the result instantly. Every string is created on your device.
Frequently asked questions
What can I use a random string for?
Random strings are handy as API keys, access tokens, salts, temporary passwords, test data and unique identifiers. Pick a length and character set that match the system you are creating them for.
Are the strings cryptographically secure?
Yes. Each character is drawn with crypto.getRandomValues rather than Math.random, so the output is unpredictable enough to use for tokens, secrets and other security-sensitive values.
Is the string sent to a server?
No. Strings are generated locally in your browser and never transmitted or stored, so you can safely use them as secrets.