Password Strength Checker

What makes a strong password?

A strong password is your first line of defense against unauthorized access. It should be long, unpredictable, and unique to each account. Short or reused passwords are trivially easy for attackers to crack using brute force or credential-stuffing attacks.

Password strength tips

• Length matters most — aim for at least 16 characters; each extra character exponentially increases cracking time
• Mix character types — uppercase, lowercase, numbers, and symbols all add complexity
• Avoid dictionary words — attackers use wordlists containing millions of common passwords and phrases
• Never reuse passwords — if one account is breached, all accounts sharing that password are compromised
• Use a password manager — it generates and stores unique passwords so you don't have to remember them

Common password mistakes

• Using personal info (birthdays, pet names, addresses) — these are easy to guess or find online
• Simple substitutions like p@ssw0rd — attackers account for these in their cracking tools
• Keyboard patterns like qwerty or 123456 — these are in every attacker's wordlist
• Reusing your "strong" password across multiple sites — one breach exposes them all

Privacy note

This tool runs entirely in your browser. Your password never leaves your device — no data is sent to any server. Use the generate button to create a cryptographically random password you can trust.