Password Strength Checker
Instantly evaluate the security of your password as you type.
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Password analysis happens entirely in your browser using the zxcvbn library. Your password is never sent to our servers.
Enter a password to see the analysis.
About the Password Strength Checker
How secure is your password? This tool provides an instant estimate of your password's strength using the industry-respected zxcvbn library developed by Dropbox. As you type, the tool analyzes your password against common patterns, dictionary words, and known data breaches (without sending your actual password anywhere) to provide a realistic strength score and actionable feedback.
How it Works:
- Type Your Password: Enter the password you want to check into the input field above. The analysis happens in real-time within your browser.
- Observe the Meter: The colored bar provides a quick visual indication of the estimated strength, ranging from red (Very Weak) to green (Strong).
- Read the Feedback: Below the meter, you'll find a strength label (e.g., "Weak", "Good") along with specific warnings (like "This is a top-10 common password") and suggestions for improvement (e.g., "Add more words", "Avoid repeated characters").
Understanding the Score (0-4):
- 0 (Very Weak): Easily guessable, likely found in common password lists. Extremely insecure.
- 1 (Weak): Still quite guessable, possibly a simple dictionary word or common pattern. Very insecure.
- 2 (Fair): Offers minimal protection, might be a slightly modified common word or a short, simple combination. Vulnerable.
- 3 (Good): Reasonably secure against average attackers, likely longer or includes a mix of character types. Recommended minimum for most accounts.
- 4 (Strong): Very resistant to guessing and brute-force attacks. Typically long and uses a strong mix of character types. Ideal for sensitive accounts.
What Makes a Strong Password?
Generally, stronger passwords are:
- Long: Aim for at least 12-16 characters, longer is better.
- Complex: Use a mix of uppercase letters, lowercase letters, numbers, and symbols.
- Unique: Never reuse passwords across different websites or services.
- Unpredictable: Avoid easily guessable information like names, dates, dictionary words, or keyboard patterns (e.g., "qwerty", "123456").
Consider using our Password Generator to create strong, random passwords and storing them securely in a password manager.
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