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Password Strength Checker: Analyze Password Security
Analyze your password strength locally, nothing is ever sent to a server.
Password Strength Checker
Type a password above to see its strength, entropy, and how long it would take to crack.
Analyze your password strength locally, nothing is ever sent to a server.
HOW TO USE
- 1Type a password, or an attempt at one.
- 2See the strength score out of 5 with a colour-coded bar.
- 3Read the entropy in bits and the estimated crack time.
- 4Work through the checklist and suggestions to harden it.
EXAMPLE
INPUT
password123
OUTPUT
Weak · low entropy · crackable instantly · suggestions shown
FAQ
Is my password sent anywhere?
No. Analysis runs entirely in your browser, nothing is transmitted or stored.
What makes a strong password?
Length above everything; longer passwords add far more entropy than special characters. A passphrase of 4+ random words beats a short symbol mash.
What makes a password strong?
Length matters most; 12+ characters with mixed case, numbers and symbols scores highest. Passphrases are both strong and memorable.
Are passwords stored or transmitted?
No; evaluation happens entirely in your browser. Nothing is sent to any server.