Check how strong a password is before you use it. Enter any password to see a live strength score, character breakdown, and actionable tips — nothing is stored or sent to a server.
Strength updates as you type. Clear the field when finished on a shared device.
Enter a password
- —Enter a password to see personalized tips.
Frequently Asked Questions
How is password strength scored?
The score combines length, character variety (uppercase, lowercase, numbers, symbols), and estimated entropy bits. Common patterns and short passwords score lower.
What makes a strong password?
Use at least 12 characters — 16 or more for sensitive accounts. Mix all four character types and avoid dictionary words, names, and keyboard patterns like “123456” or “qwerty”.
Is my password sent to a server?
No. Checking runs entirely in your browser. Clear the field when you are done on a shared device.
Can I generate a strong password instead?
Yes. Use the Password Generator to create cryptographically random passwords with custom length and character options.
Does this replace a breach check?
No. This tool estimates strength from structure only. For leaked-password checks, use your password manager or a dedicated breach lookup service.
Is this tool free and does it work on mobile?
Yes on both counts. The Password Strength Checker on draft21 is completely free with no sign-up required and works on all devices.