String Generator
Generate random strings with custom length and character sets.
Test data, placeholder secrets and throwaway tokens are needed constantly during development. The String Generator creates several random strings at once from the character sets you choose, with presets for common shapes. It runs locally, so nothing you generate is sent to a web service.
Flexible length and count
Generate strings from 1 to 128 characters long, and up to 50 of them in a single run.
Character set toggles
Combine lowercase, uppercase, numbers and symbols, or add your own custom characters to the pool.
Quick presets
One click sets up Password (Strong), Password (Simple), API Key, PIN or Token with a matching length and character mix.
Copy one or all
Copy any single string, or copy the whole batch as one line per string.
How do I generate a random string of a given length?
Set the length slider, pick the character sets you want and click Generate. You can create up to 50 strings at a time and copy them individually or all at once.
Is this suitable for production secrets?
It is intended for test data and development use. The strings are generated with the standard JavaScript random function, which is not a cryptographically secure source, so use a dedicated secrets manager or CSPRNG for production credentials.
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