How to Create and Evaluate Strong Passwords

Strength begins with length and randomness

A strong password is difficult to guess and is not reused. Length usually contributes more than decorative substitutions such as replacing an “a” with an at sign. Random generation avoids names, dates, keyboard patterns, and phrases attackers are likely to try early.

A practical password workflow

1. Generate a long random password using several character groups.
2. Store it in a reputable password manager rather than relying on memory.
3. Use a different password for every account.
4. Enable multi-factor authentication, preferably a phishing-resistant method where available.
5. Use the strength checker as feedback, not as a guarantee.

What strength meters miss

A local meter can inspect length and patterns, but it cannot know every leaked password list or how a particular service stores credentials. A seemingly complex password may still be weak if it is common or reused. Service-side rate limits and modern salted password hashing also affect resistance to guessing.

When to change a password

Change it promptly after confirmed exposure, suspicious account activity, or accidental sharing. Routine forced changes can encourage predictable patterns, so follow the service's policy and current organizational guidance instead of making small periodic variations.