Password Strength Checker

• Use longer passwords whenever the service allows it.
• Prefer unique passwords for important accounts.
• Avoid names, birthdays, phone numbers, and predictable words.
• Do not reuse the same password across multiple important services.
• Consider using a reputable password manager.
• Enable multi-factor authentication when available.
• Do not share your passwords with other people.

A strong password is generally long, unique and difficult for another person or automated system to guess. Password length is particularly important, while a mixture of uppercase letters, lowercase letters, numbers and special characters can also help depending on the service.

Avoid predictable information such as your name, birthday, phone number, common words, repeated characters or simple sequences. For important accounts, use a unique password and consider a password manager.

• Simple sequences such as 123456 or abcdef.
• Repeated characters such as aaaaaaaa.
• Common words such as password or welcome.
• Names of people, pets, sports teams or places.
• Birthdays and easily available personal information.
• Keyboard patterns such as qwerty.
• Minor variations of passwords that are reused across websites.

A passphrase is a password made from multiple words or a longer phrase. When supported by a service, a long and unique passphrase can be easier to remember while still providing substantial length.

The most important considerations are that the credential should be difficult to guess, unique to the account, and protected from unnecessary exposure.

Password strength describes characteristics of a password, such as its length and predictability. Password security is broader and includes how the password is stored, whether it is reused, whether multi-factor authentication is enabled, and whether the account has been exposed.

A password strength checker can provide useful guidance, but no client-side checker can guarantee that a password is completely secure.