DEMO

asdf-fox

Password-strength checks built on zxcvbn-ts, with extra checks for predictable patterns and common current words and names.

Try a password

Password

Other words to check (optional; username, site, or project words) Also check Pwned Passwords

Examples:

Results will appear here.

What this adds beyond plain zxcvbn + Pwned Passwords

Plain zxcvbn + Pwned Passwords

Baseline zxcvbn score and feedback.
Exact breach checks for the full password.

asdf-fox adds

Extra checks for long arithmetic runs, truncated repeats, and simple interleaving patterns.
Additional local word and name coverage for current terms that plain zxcvbn may not know.
Recovery of a bounded generic span when a local zxcvbn parse finds a lower-cost known-word parse.
Exact local checks for frequent directional word pairs, with a bounded pair discount and visible evidence.
Small case and leetspeak adjustments for recognized words instead of treating them like random symbols.
Warnings for a few easy breached variants, not just exact full-password matches.