Random String Generator
Generate random strings with customizable length and character sets
About the Random String Generator
This random string generator produces strings of whatever length you set, drawn from a character set you choose. Use it for test fixtures, cache-busting suffixes, temporary identifiers and placeholder API keys.
A random string generator covers the cases where you need arbitrary characters rather than a specific format. Unlike a UUID it has no fixed structure, so you control the length and the alphabet exactly.
That control is what makes it useful in practice. Some systems reject symbols, some require a fixed length, and some break on ambiguous characters — excluding l, 1, I, O and 0 is worth doing for any string a person will read aloud or retype from a screen.
Reasonable uses include test data, unique filename suffixes, cache-busting query values and non-production tokens. For a password use the password generator, and for a real cryptographic secret generate it server-side with a proper library rather than in a browser tab.
How to use the Random String Generator
- Set the length. Choose how many characters each string should have.
- Choose the character set. Include letters, digits and symbols as your target system allows.
- Set how many. Generate one string or a batch.
- Copy the output. Take the strings for your fixtures, suffixes or tokens.
Random String Generator features
- Any length from a few characters upward
- Configurable letter, digit and symbol sets
- Optional exclusion of ambiguous characters
- Single or bulk generation
- Uses the browser cryptographic random source
- Runs entirely in your browser
Frequently asked questions
How is this different from a UUID generator?
A UUID has a fixed 36-character structure. Here you choose the length and alphabet freely.
Why exclude ambiguous characters?
Because l, 1, I, O and 0 are easily confused. Excluding them matters for any string a person reads from a screen or types by hand.
Can I use these as production secrets?
For placeholders and test data, yes. Real cryptographic secrets should be generated server-side with a proper library.
Is the randomness cryptographically sound?
It uses the browser's cryptographic random source rather than a simple pseudo-random function.
Are generated strings stored?
No. They are produced in your browser and never transmitted or logged.