🛡️ Password Strength Checker: How Safe is Your Password?

Check how long it would take a computer to crack your password and get tips to improve it.

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Processed locally in your browser. We never store passwords.

Test Your Password Strength: Is Your Data Secure? 🛡️

Stop guessing. Measure your password’s resilience against modern cracking tools and see exactly how long it would take a computer to guess your credentials.

💡 How It Works

This tool uses the zxcvbn algorithm—the industry standard for realistic strength estimation. Instead of just checking for a capital letter or a symbol, it evaluates "entropy" by identifying common patterns, dictionary words, and predictable sequences.

  • Estimate Crack Time: See how many seconds, years, or centuries it takes to brute-force your password.
  • Get Real-Time Feedback: Receive specific suggestions to fix weaknesses like repeated characters or common words.
  • Privacy-First Design: Your password never leaves your device. All calculations happen locally in your browser.

📘 Security Pro-Tips

  • Audit Your Current Passwords: Paste your existing passwords to see which ones need an upgrade.
  • Aim for "Strong": Target a score of 4. This usually requires a balance of length and randomness.
  • Use Passphrases: A string of random words is easier for you to remember but exponentially harder for a machine to crack.

🧐 FAQ

Q: Is it safe to type my password here? A: Yes. Your data is never stored or transmitted to a server. The analysis runs entirely within your browser’s memory.

Q: What makes a password "weak"? A: Using names, birthdates, "123456," or dictionary words. Hackers use "dictionary attacks" that can cycle through millions of these common combinations in seconds.

Q: How often should I change my password? A: Only change it if you suspect a breach. Instead of frequent rotations, focus on using a unique, strong passphrase for every individual service.

📚 Entropy vs. Complexity

Stop swapping "a" for "@." Modern cracking scripts anticipate these common substitutions. To truly secure an account, prioritize length. A 20-character sentence of simple words is significantly harder to crack than an 8-character "complex" password. In the world of security, entropy (unpredictability) always beats character variety.