Password Strength Checker
Test how secure your password is. Your password never leaves your browser - all analysis happens locally.
Password Best Practices
Length Matters Most
A 16-character password is exponentially stronger than an 8-character one. Prioritize length over complexity.
Use a Password Manager
Generate and store unique passwords for every account. 1Password, Bitwarden, or Apple Keychain.
Enable 2FA
Even strong passwords can be compromised. Two-factor authentication adds a second layer of protection.
Frequently Asked Questions
Is it safe to enter my password here?
Yes! This tool runs entirely in your browser. Your password is never sent to any server - all analysis happens locally on your device. You can verify this by checking the network tab in your browser's developer tools.
What makes a password strong?
A strong password is long (12+ characters), uses a mix of uppercase, lowercase, numbers, and symbols, and avoids common words or patterns. The most important factor is length - a 16-character password with just letters is often stronger than an 8-character password with symbols.
How is crack time calculated?
We estimate how long it would take to crack your password using a modern GPU capable of 10 billion guesses per second. This is a worst-case scenario where attackers know your password's character set. Real-world attacks may be slower or faster depending on the method used.
Should I use a password manager?
Absolutely! A password manager generates and stores unique, strong passwords for every site. This means you only need to remember one master password. Popular options include 1Password, Bitwarden (free), and Apple Keychain.
What about passphrases?
Passphrases (like 'correct-horse-battery-staple') can be excellent passwords. They're long, memorable, and hard to crack. Just make sure to use random words, not phrases from books or songs that attackers might guess.
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