NordVPN Password Strength
Test how secure your password is against attacks
Result
Please check your inputs.
How to Use This Tool
Open the NordVPN Password Strength tool in your browser.
Type or paste the password you want to test into the input field (your password is never stored or sent to a server).
Instantly view your password's strength score, time-to-crack estimate, and detailed feedback on what makes it weak or strong.
Use the tool's suggestions to improve your password — such as adding length, mixing character types, or avoiding common words.
Retest the improved password to see your progress, then apply the final strong password to your accounts.
What Is NordVPN Password Strength?
Password strength measures how resistant a password is to guessing or brute‑force attacks. The NordVPN Password Strength tool evaluates your password by analyzing its length, character diversity, and common patterns, then calculates an estimated time a hacker would need to crack it. This matters because weak passwords are the leading cause of account breaches — cybercriminals use automated tools that can try millions of combinations per second. By testing your password with this tool, you get an objective risk assessment and actionable advice to fortify your digital security, helping you protect sensitive data across email, banking, and social media accounts.
Formula
The tool uses entropy (E) to measure password strength: E = L × log₂(C). L = total number of characters in your password. C = size of the character set used (e.g., 26 for lowercase letters, 52 for lowercase+uppercase, 62 if digits are added, 95 for all keyboard characters). Higher entropy means more possible combinations and greater resistance to brute‑force attacks. The time‑to‑crack estimate is then derived by dividing the total number of combinations (2^E) by a realistic guessing rate (e.g., billions of guesses per second).
Tips for Best Results
🔐 Use a passphrase of 4–5 random words — long and easy to remember, hard to crack.
📏 Make your password at least 12 characters; every extra character dramatically increases strength.
🎲 Mix uppercase, lowercase, numbers, and symbols — but avoid common substitutions like ‘P@ssw0rd’.
🔄 Never reuse passwords across different sites; use a password manager to generate and store unique ones.
Frequently Asked Questions
How does the NordVPN Password Strength tool measure security?
It calculates the entropy of your password based on its length and the variety of characters used. A higher entropy score means it would take exponentially more guesses to crack your password, making it more secure.
Is my password safe when I type it into the tool?
Yes — the tool runs entirely in your browser. Your password is never transmitted over the internet or stored anywhere. It’s processed locally to instantly give you a strength score.
What should I do if my password is marked as weak?
Increase its length, add a mix of character types (uppercase, lowercase, digits, symbols), and avoid common words or sequences. The tool provides specific suggestions — follow them and retest until you reach a ‘strong’ rating.