Free Password Strength Checker
Test any password's strength · entropy, estimated crack time, and detection of common patterns and dictionary words.
Frequently asked
Is it safe to type my real password here?
Yes. The analysis runs entirely in your browser using JavaScript · your password is never transmitted, logged, or stored. Even so, for a password you actively use, changing it after testing anywhere is good hygiene.
How is crack time estimated?
From the password's entropy (character set size and length) against a fast offline attacker doing about 10 billion guesses per second, with penalties for common patterns, repeated characters, and dictionary words.
Related tools
- Email Header Analyzer · Paste raw email headers and get the story: did SPF, DKIM and DMARC pass, what path did the message take, and does anything look spoofed.
- Punycode Converter · Convert Unicode domains to xn-- punycode and back · and check whether a domain mixes scripts the way phishing lookalikes do.
- robots.txt Tester · Paste your robots.txt and test any URL against it · per user-agent, including AI crawlers · using the same longest-match rules Google applies.