Password Strength Checker
Analyze password strength instantly with a 0-4 score, crack-time estimate and fix tips. Free client-side checker that never sends data.
13 characters • checked locally in your browser — nothing is sent or stored.
- Avoid common words and passwords — attackers try these first.
About this Tool
The Password Strength Checker scores any password from 0 to 4, estimates how long it would take to crack, and lists concrete ways to improve it. Everything runs instantly in your browser — your password is never sent, stored, or logged anywhere. Use it to audit existing passwords before replacing weak ones with fresh, unique alternatives.
Common Use Cases
Auditing Old Passwords
Paste in passwords you reuse across sites to find the weakest ones worth replacing first with strong unique alternatives.
Meeting Signup Rules
Check a new account password against length and complexity expectations before submitting a registration form that might reject it.
Team Security Training
Demonstrate live how small changes like adding symbols or length turn an instantly-cracked password into one lasting centuries.
Verifying Manager Output
Spot-check passwords produced by your password manager or generator to confirm they reach a top score before saving them.
Pro Tips
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Length Beats Complexity
A long passphrase of random words resists cracking far better than a short tangle of symbols. Aim for 12+ characters at minimum, 16+ for important accounts.
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Unique Beats Strong
Even a top-scoring password fails if reused — one breach exposes every account sharing it. Give every site its own password via a manager.
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Enable Two-Factor Auth
No password is unbreakable, so add an authenticator app or security key on email, banking, and social accounts as a second line of defense.
FAQs
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