Local password generator

Generate local passwords from selected character classes using secure uniform sampling and explicit exclusion rules.

Your input

Outputs are cleared when the input changes.

Result

Enter your data or use the example, then run the tool.

Worked example

A 20-character password can require lowercase, uppercase, digits and symbols. Every output is checked against the chosen classes.

Excluding ambiguous characters removes O, 0, I, l, 1 and the vertical bar from the selected alphabet.

Method

Secure rejection sampling selects each character without modulo bias. If require-each fails, discard the entire string and retry.

Entropy is calculated for the uniform set satisfying the chosen restrictions. No user input or generated secret is sent to a server.

Limits

Length 16–128, count 1–100. Removing every character of a selected class is rejected. No insecure random fallback.

Not a password manager or breach check. Results clear on language changes and are not restored automatically.

Sources

MDN: cryptographic random sampling

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Your inputs stay on this device. Only optional, consented page visits are measured. Input values, files, filenames and processing logs are not sent to Analytics.

When switching languages, text, settings and selected files are temporarily kept on this device. Transfers are removed after restoring; interrupted transfers are cleaned up on a later visit. Inputs and files are never uploaded.