Password Strength Checker
Quickly check how strong your password is, see a score, and get clear suggestions to improve it.
Check your password before you use it
Paste or type any password to see an instant strength rating. Use the suggestions below the meter to make it harder to guess or crack.
Tip: this checker runs entirely in your browser. Still, avoid testing real, highly sensitive passwords on shared or untrusted devices.
Password input
Enter a password to see its strength and feedback.
Suggestions to strengthen your password
- Start typing a password to see the strength analysis.
How this checker works
We score your password based on length, the variety of character types, and whether it looks like a common or easy-to-guess pattern. Everything runs locally in your browser—your password is never sent to any server.
Use this tool to improve your passwords before saving them in a password manager. For critical accounts, combine a strong password with two-factor authentication.
Test Your Strength
How tough is your password? Find out instantly with our local, privacy-first analyzer.
Instant Scoring
Get a score from 0 to 100 based on length, entropy, and complexity rules.
Local Analysis
We check the password right here in your browser. It never leaves your device.
Pattern Match
We detect common sequences ("123456") and dictionary words that hackers love.
Actionable Tips
Detailed feedback tells you exactly what to fix to turn "Weak" into "Very Strong".
How this Password Strength Checker works
This security assessment tool analyzes the strength of passwords by estimating resistance to guessing and brute-force attacks. Utilizing algorithms like zxcvbn, it evaluates factors beyond length and variety, such as repeated patterns, common dictionary words, keyboard sequences, and substitution tricks. The tool provides a strength score ("Very Weak" to "Very Strong"), estimates cracking time, and offers specific feedback for improvement. Applications include educating users on password hygiene, auditing credentials before use, and integrating real-time strength meters into signup flows. No password data is sent to any server; all checks are performed locally in the client browser for privacy.
How to Use
Type or paste a password
Enter the password you plan to use. You can turn on "hide" mode if someone is nearby.
Review the strength score
See an instant rating from Very weak to Very strong plus a visual strength bar.
Apply the suggestions
Follow the hints to increase length, mix character types, and avoid common patterns.
Example Usage
Use the checker to compare different passwords until you get a strong or very strong rating.
Frequently Asked Questions
How does a password strength checker work?
What matters most for password strength?
Can a password be strong even without symbols?
Does this tool store or send my password anywhere?
Is this Password Strength Checker safe to use?
Related Tools
The Password Strength Checker is maintained by CodeItBro. We aim to provide the best free developer tools on the web. If you have feedback or suggestions, please visit our contact page.
Featured on
