- At least 12 characters
- Contains uppercase
- Contains lowercase
- Contains numbers
- Contains symbols
Processed locally in your browser. Nothing is sent anywhere.
Free Online Password Strength Checker
Test password length and character variety instantly with a private, browser-only strength meter. Your password never leaves this page. It helps users and developers evaluate password entropy and identify missing character classes before adopting a credential.
What is a password strength checker?
A password strength checker estimates how resistant a password may be to common guessing strategies. This checker looks at length, uppercase and lowercase letters, numbers, and symbols, then provides a rough offline crack-time estimate.
How to use this password checker
Type or paste a password into the field. The meter updates immediately, and the checklist shows which characteristics are present. Use the result as guidance rather than proof that a password has never appeared in a breach.
Build better passwords
Prefer a long, unique passphrase or a password-manager-generated value. Never reuse an important password, and do not enter a real password into a tool you do not trust.
How to use Password Strength Checker for related tasks
Type a candidate, review the password criteria, and treat the crack-time estimate as guidance rather than a guarantee against leaked-password attacks.
Related tools: Password Generator, Hash Generator.
Frequently asked questions
Is my password sent to a server?
No. The password is scored locally in your browser and is never transmitted, logged, or stored by this tool.
What makes a password strong?
Long, unique passwords with a mix of uppercase and lowercase letters, numbers, and symbols are harder to guess. A password manager can generate and remember unique passwords for every service.
How accurate is the crack-time estimate?
It is an educational estimate based on character-set size and a conservative offline guessing rate. Real attackers use dictionaries, leaked passwords, hardware, and different attack strategies.
Does a strong password score prove it is safe?
No. A score cannot know whether a password appeared in a breach or is reused elsewhere; use a unique password manager value for important accounts.