Password Strength Checker
For security Real Use in use password do not enter not thing recommended. similar pattern as sample check.
Overall score
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Entropy: -
Length: -
Online attack (slow)
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Offline attack (fast)
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Improvement tips
Popular Developer Tools
How to Use
- Enter a password (or an example).
- Check score/entropy and estimated crack times.
- Follow the tips to improve it.
- Optionally generate a new password and test again.
How to Read Results
- Score/entropy are estimates. Dictionary words, sequences, and repetition are heavily penalized.
- “Online” assumes rate-limited login attempts; “offline” assumes fast guessing against leaked hashes.
- Real safety depends on reuse, 2FA, and whether the password is already leaked.
- Prefer 12+ characters (16+ recommended) or a long passphrase.
FAQ
Is my data uploaded to a server?
No. Whenever possible, processing happens locally in your browser and we do not store your inputs or results on our servers. (Network requests may still occur for page loads and ads.)
What should I check if the output looks wrong?
Check input encoding (UTF‑8), line breaks (CRLF/LF), whitespace/quotes, and options (case, URL encoding mode, etc.). For sensitive values, follow your security policy before pasting.
What does “entropy” mean here?
It is an estimate of how hard a password is to guess. Longer passwords (12+ chars) and mixed character sets usually increase it. Real safety also depends on patterns, dictionary words, and reuse.