How characters are selected
The tool uses cryptographic random numbers and selects characters uniformly without modulo bias. A custom alphabet precisely limits the allowed characters.
When it is useful
Random strings work well for test data, temporary labels, fixtures, and demo identifiers. Use the specialized tools for standard UUIDs and user passwords.
Local generation
The alphabet and generated values remain in the browser and are never sent to third parties.
Frequently asked questions
How is a random string different from a password?
This tool focuses on custom alphabets and testing, while the password generator manages common character groups separately.
Can generated strings repeat?
Yes. Randomness does not guarantee uniqueness. More characters and a larger alphabet sharply reduce the probability.