Free Password Strength Checker Online — Check how strong your password is
Enter a password
How to Check Password Strength
Type your password to see its strength rating, estimated crack time, entropy bits, and character analysis. Get suggestions to make it stronger. Your password never leaves your browser.
What makes a strong password?
At least 12 characters, mix of uppercase, lowercase, numbers, and symbols. Avoid dictionary words, personal info, and common patterns like "123456" or "password".
What is entropy?
Entropy measures randomness in bits. Higher entropy = harder to crack. A 12-char password with all character types has ~78 bits of entropy — enough to resist brute force attacks.
More Security & Privacy Tools
Password Generator
Generate strong random passwords
Text Encryption/Decryption
Encrypt and decrypt text with AES-256
Random String Generator
Generate random strings, tokens, and API keys
Password Breach Checker
Check if your password has been in a data breach
2FA Code Generator
Generate TOTP two-factor authentication codes
Other Free Tools You Might Need
Browse all 🔒 Security & Privacy Tools or see all free tools.