Password Strength Checker — How Secure Is Your Password?
Test how strong your password is with our free password strength checker. Get instant feedback on security level, crack time estimate, and improvement tips.
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What Makes a Password Weak?
Weak passwords share predictable patterns: dictionary words, names, birthdays, simple substitutions ("P@ssw0rd"), keyboard runs ("qwerty"), or anything under 10 characters. Even worse is reuse — a strong password used on five sites becomes weak the instant one of those sites is breached and the password dump hits the internet.
Password Strength Levels Explained
The table below maps password characteristics to estimated time-to-crack on modern GPU hardware. Crack times assume an attacker has stolen the password hash and is running an offline brute-force or dictionary attack — the realistic worst case after a database breach.
| Strength | Characteristics | Crack Time |
|---|---|---|
| Very Weak | Under 6 chars, common word | Instantly |
| Weak | 6-8 chars, no symbols | Minutes |
| Fair | 8-10 chars, some variety | Hours |
| Strong | 12+ chars, mixed types | Years |
| Very Strong | 16+ chars, fully random | Centuries |
How Long Would It Take to Crack Your Password?
Modern attackers use GPU clusters that can test billions of passwords per second against a stolen hash. An 8-character password with mixed types falls in hours. A 12-character random password takes years. A 16-character random password takes centuries with today's hardware — which is why length is the single most important variable.
How to Create a Stronger Password
Two reliable approaches: generate a 16+ character random string with our password generator and store it in a password manager, or build a long passphrase from four unrelated words (e.g. "plum-orbit-velvet-anchor"). Either way, every account gets a unique password and 2FA is on for anything that matters.
Frequently Asked Questions
How is password strength calculated?+
Strength is calculated based on length, character variety (uppercase, lowercase, numbers, symbols), and whether the password matches known common passwords or dictionary words.
Is it safe to type my real password into this tool?+
Yes. The check happens entirely in your browser using JavaScript — your password is never sent over the network, logged, or stored. You can verify this by disconnecting from the internet and the tool still works.
Does this tool check breached password databases?+
It checks against a built-in list of the most common passwords, but does not query external breach databases (like Have I Been Pwned) to keep everything fully offline. For breach checks, use HIBP directly.
Why does "P@ssw0rd123" score weak?+
Because it's one of the most-leaked passwords in history. Common substitutions (@ for a, 0 for o) don't fool modern cracking tools — they're built into every dictionary attack.
Is a long simple password better than a short complex one?+
Almost always. "correct-horse-battery-staple" (28 chars, all lowercase) is far stronger than "Tr0ub4d!" (8 chars, mixed). Length compounds exponentially; character variety only adds linearly.
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