Password Strength Checker
Check the strength of your password instantly in the browser. Learn how to create secure passwords with our free analyzer.
Strength:
None
Password Requirements
- At least 12 characters
- Contains uppercase letter
- Contains lowercase letter
- Contains number
- Contains symbol (e.g. !@#$%)
Tip: The best passwords are long phrases or combinations of random words that are easy for you to remember but impossible for computers to guess.
Free Password Strength Checker & Complexity Checker
Check how secure your password is instantly. This password complexity checker analyzes your password against common security rules including length, character variety, and complexity. Your password is analyzed securely right here in your browser and is never sent to any server.
How to Use It
Type your password into the input field and the strength meter and rule checklist update live as you type — a quick password test strength check with no signup, no upload, and no waiting.
Example
A password like "password123" is flagged weak, while "xK9$mP2!vL7" scores strong thanks to its length and mix of character types.
Common Use Cases
- Testing a new password before setting it on an important account.
- Understanding why a password was rejected as "too weak" by a signup form.
- Using it as a password security tester before reusing or updating a company or personal account password.
- Comparing a few candidate passwords side by side to pick the strongest one.
FAQs
Is my password sent anywhere when I type it?
No — the analysis runs entirely in your browser using JavaScript, and your password is never transmitted or stored.
Is this a real password complexity checker or just a length counter?
It's a full password complexity checker — it scores length tiers, character variety (uppercase, lowercase, numbers, symbols), and penalizes passwords made of only letters or only numbers, rather than just counting characters.
How does this password test strength scoring work?
Points are added for length milestones (8+, 12+, 16+ characters) and for including uppercase letters, lowercase letters, numbers, and symbols, then reduced for passwords using only one character type. The total maps to a Very Weak, Weak, Good, or Strong rating shown on the meter.
Can I trust an online password security tester with my real password?
This tester never sends your password over the network or saves it anywhere — the entire check runs client-side in your browser's memory and disappears when you leave the page. Still, as a general rule with any online tool, avoid testing a password you're currently using and change it afterward if you do.
What makes a password actually strong?
Length matters more than complexity tricks — a long passphrase of unrelated words is typically stronger and easier to remember than a short password with substituted symbols. Aim for at least 12-16 characters mixing letter case, numbers, and symbols, and avoid reusing the same password across multiple accounts.