Password Strength Checker

What the score actually checks

The current local checker assigns a simple structural score out of six. Length earns credit at 8 and 12 characters, with another point at 16 characters. It also checks whether the string contains both lowercase and uppercase letters, at least one digit, and at least one non-alphanumeric character. The final label ranges from Weak through Fair and Strong to Very strong.

What the score does not check

The tool does not search a breach database, estimate a real attacker's cracking cost, recognize every dictionary word or keyboard pattern, or know whether the same password is reused on another account. A string can therefore earn a high structural score and still be a poor credential if it is predictable, reused or already exposed.

Length and uniqueness matter more than tricks

A long unique generated password is generally a better practice than taking a short word and making obvious substitutions such as replacing “a” with “@”. For important accounts, use a reputable password manager to create and store a different password for each service, or use a passkey when the service supports it.

Use a safe testing habit

The checker runs locally in page JavaScript and does not intentionally save the entered password. Even so, if you are evaluating a highly sensitive existing credential, you can test a representative string with the same length and character pattern instead of pasting the real secret into any web page. Never share an actual password in screenshots, chat messages or support requests.

Account security is bigger than one password

Enable multi-factor authentication or passkeys where available, protect the recovery email and phone attached to the account, and change credentials promptly if a service reports a breach. A password-strength label cannot protect against phishing, malware, session theft or weak account-recovery settings.

Quick check before using a new credential

• Is it unique to this account?
• Is it long enough to resist guessing rather than merely meeting the minimum?
• Is it stored safely instead of reused from memory?
• Is stronger sign-in such as a passkey or MFA available?

Use the score as feedback, not a security guarantee

Password-strength estimates usually consider features such as length, character variety and obvious repetition. Those checks can identify weak patterns, but they cannot prove that a password has never appeared in a breach, is unique to one account or is resistant to every attack. A long phrase reused across several sites can still create a serious risk if one service is compromised.

A safer way to check credentials

1. Use the checker only for a password you are comfortable evaluating in the current browser.
2. Prefer a randomly generated, long and unique password or passphrase rather than a predictable variation of a familiar phrase.
3. Do not reuse the same password on email, banking, work and social accounts.
4. Store unique credentials in a reputable password manager and enable multi-factor authentication where available.
5. If a real password has been exposed or entered on an untrusted device, change it on the relevant service rather than relying on a score.

A strength label is not the same as a breach lookup. This page does not claim to query every known leaked password or test a password against a particular site's policies. It cannot judge the security of the device, browser extensions, account recovery process or the service where a password will be used.

Privacy and limits of this check

The entered text is evaluated in the browser by the page's current checks and is not intended to be saved as a NexusNova account credential. Normal browser memory, extensions, monitoring software and shared-device access are outside that promise. For sensitive accounts, the safer choice is to create a new random credential with a password manager rather than copy a current password into multiple tools.

Password-strength questions

Is a long password always secure?

Length helps, but uniqueness, randomness and safe storage matter too. Avoid common phrases, personal details and predictable substitutions.

Should I paste my current bank password here?

Do not paste sensitive live credentials into an online tool. Use a password manager's built-in assessment or generate a new unique password instead.