Random String Generator
Build a random string of any length, choosing which of uppercase, lowercase, numbers, and symbols to include.
—How it works
Drag the slider to set the length, flip on the character sets you want — uppercase, lowercase, digits, symbols — and the string rebuilds instantly. Need a fresh one with the same settings? Hit generate.
It's the go-to for the little strings that keep code moving: API keys, test fixtures, session tokens, random file names, or a quick unique identifier. Keep symbols off for something you'll paste into a URL, or turn everything on for maximum entropy.
Every character is drawn from your browser's secure random generator, so the output isn't a predictable pattern. Unlike the password tool, this one is deliberately plain — it uses the full character sets without excluding look-alikes, which is what you usually want for machine-read strings.
Frequently asked questions
How long can the string be?
Anywhere from a single character up to 128. Slide to whatever length your key, token, or identifier calls for.
How is this different from the password generator?
The password tool skips look-alike characters like O and 0 for easier typing. This one uses the complete character sets, which suits API keys and machine-read tokens.
Can I make it letters only?
Yes. Turn off numbers and symbols and leave the letter sets on for a purely alphabetic string, or mix and match however you like.