Password Strength Lab

Real-time analysis of password strength — entropy, estimated crack times, pattern detection. Nothing leaves your browser.

STRENGTH
0 / 100
ENTROPY
0 bits
CHARACTER SET
POOL SIZE
0 characters

ESTIMATED CRACK TIME

Online Attack
1K guesses/sec
Offline (CPU)
10M guesses/sec
GPU Cluster
100B guesses/sec
Nation-State
1T guesses/sec

REQUIREMENTS

Minimum 8 characters
Uppercase letter (A-Z)
Lowercase letter (a-z)
Number (0-9)
Special character (!@#$…)
12+ characters (recommended)

PATTERN DETECTION

Enter a password to check for patterns…

SECURITY TIPS

USE A PASSPHRASE

Combine 4+ random words: correct-horse-battery-staple

LENGTH > COMPLEXITY

A 20-char passphrase beats an 8-char complex password. Entropy scales with length.

USE A PASSWORD MANAGER

KeePass, Bitwarden, or 1Password. Generate unique passwords for every account.

ENABLE MFA

Multi-factor authentication stops 99.9% of account compromise attacks (Microsoft data).

AVOID PERSONAL INFO

Names, birthdays, pet names are in every attacker's wordlist. Social media makes them trivial to find.

CHECK BREACHES

Use haveibeenpwned.com to check if your passwords have been exposed in data breaches.