Password Strength Checker

The analyzer itself does not submit the entered password. Get a local strength estimate, pattern checks, a modelled crack-time signal, and on-device suggestions.

🔑 Password 🔒 Local Analyzer 💻 Client-Side Only
🔒 Privacy boundary: The analyzer code does not transmit, store, or log the entered password. Your browser, device, extensions, keyboard software, and any shared screen remain outside that boundary. Avoid testing a live production credential.
🔑
Check Your Password
Start typing to analyse...
Strength Score
0/100
Time to Crack
-
💡
Stronger Password Suggestion
📝
Passphrase Alternative (easier to remember, harder to crack)

A long, randomly generated passphrase can be easier to remember while resisting guessing. The real strength depends on the word list, selection method, length, and whether it is unique.

🔒
Password Best Practices
Use a password manager (Bitwarden is free and open-source) to generate and store unique passwords for every account. Never reuse passwords — a breach at one site exposes all your accounts if you reuse. Enable 2FA on every account that offers it, especially email and banking.
Password safety brief

Check a password locally, then keep the result private

Create a redacted follow-up brief from the score band and weakness category. The brief never includes the password you entered.

  • What you get: a non-secret reminder of the account type, score band, weakness focus, and next action.
  • How it works: choose the result categories yourself after reviewing the local analysis.
  • What to protect: never paste the real password into the brief, a message, a screenshot, or a printed page.

Reviewed July 2026. This is a heuristic estimate, not a breach lookup, service-policy check, or security guarantee.

Password Strength Checker — enter your details above to see your result.
Review score

Password Strength Checker FAQ

Does the analyzer send or store the password?

The analyzer code runs in the browser and does not submit or save the entered password. Your device, browser, extensions, keyboard software, and shared screen are separate risks, so avoid testing a live production credential.

Does a strong score prove a password is safe?

No. This heuristic cannot check password reuse, every breached-password list, phishing exposure, malware, account recovery, or the rules of the service where the password will be used.

Can I export or print the result?

The raw password and generated suggestions intentionally have no copy, print, PDF, or save action. Only the separate redacted safety brief can be copied.

Privacy & verification

Password strength is a local estimate, not a breach check

The analyzer runs in your browser and avoids adding the raw password to the copyable brief. It cannot confirm whether a password has appeared in a breach or will be accepted by a specific service.

Local-only analyzer

Reviewed 2026. Do not paste production secrets into tools you do not control.

Methodology

  • Scores length, estimated entropy, character variety, repeated characters, common-password matches, and predictable sequences.
  • Shows a time-to-crack estimate using a fixed offline guess-rate assumption.
  • Generates draft passphrases locally and copies only the safety brief, not the entered password.

Before acting

  • Use a trusted password manager, unique passwords per site, and MFA for important accounts.
  • Use a trusted breach-monitoring service separately if you need compromise checks.
  • Treat the result as a local planning signal, not a security guarantee, audit, or breach-database lookup.
  • Reference: NIST SP 800-63B password-verifier guidance, checked 18 July 2026.