Password Strength Tester

Type or paste a password and see how an attacker would crack it: the entropy in bits, the character classes used, the estimated time to crack under four attacker speeds, and the specific weak patterns (common words, keyboard runs, sequences, repeats, years, dates) that bring the score down. Everything runs in your browser — nothing is uploaded, nothing is stored.

The password stays on this page. Nothing is uploaded, stored, or written to the clipboard.

Hits will be highlighted here as you type.

Strength

— — bits of entropy

Start typing to see the analysis.

Composition

Length 0
Lowercase 0 a–z
Uppercase 0 A–Z
Digits 0 0–9
Symbols 0 !@#$%…
Other (Unicode) 0 emoji, accents…

Estimated time to crack

Online, throttled
10 guesses / sec
—
Online, unthrottled
100 guesses / sec
—
Offline, slow hash
10k guesses / sec (bcrypt)
—
Offline, fast hash
10 billion guesses / sec (MD5)
—

Weak patterns detected

Nothing to report yet.