No password upload
There is no strength-check API. All checks are small JavaScript functions in this page.
Local diagnostic · 08
Inspect the pattern without exposing the password.
Measure length, character variety, and obvious predictable patterns. Analysis happens as you type and the value never leaves this browser tab.
No breach lookupNo network requestNo storage
Password strength checker● Local analysis
Type a password to analyze
Length0
Character varietyLimited
Pattern reviewWaiting for input
This is an educational estimate, not a guarantee. The password is not compared against online breach databases.
No fake crack time
Attack speed depends on the system and hashing method, so we show practical signals rather than a dramatic timer.
Not a breach check
A strong-looking password can still be unsafe if it has been reused or exposed elsewhere.
A strength meter sees structure, not your full risk.
This checker estimates the search space implied by length and character variety, then reduces the result when it finds common patterns. Real password cracking is more sophisticated and depends on how the service stores passwords.
Most important checks: Is the password unique? Was it randomly generated? Is it long enough? Is multi-factor authentication or a passkey available?
Length changes the search space quickly
Every additional independently selected character multiplies the possible combinations. A long random password is more dependable than a short password decorated to satisfy a policy.
Reuse defeats apparent strength
A 30-character password leaked from one website can be tried directly at another. No local strength score can detect reuse.
Do not test real passwords on unknown websites
A checker that sends input to a server could log it. This page works without a request, but generating new credentials inside your password manager remains safest.