Security Tools

What's in this category?

Some tools in this category create a new secret, and others check something you already have. On the creating side are the Password Generator, Passphrase Generator, PIN Code Generator and Random Token Generator. As the page intro says, the Password Generator uses your browser's own cryptographic random number generator. The TOTP Code Generator is close to this group, producing the standard verification code from your own 2FA secret key.

On the checking side are the Password Strength Checker, Suspicious Link Checker and Card Number Format Checker. The Text Encryptor (AES) locks a note with a password of your choice and runs entirely in your browser. The Caesar Cipher Tool is not for protection at all. It is there to show how basic ciphers work, for a class, or for a small puzzle.

Which tool for which job?

• Opening a new email or shopping account? Use the Password Generator for a unique password per site. For something you must memorize, like a password manager's master password, use the Passphrase Generator.
• Need a numeric code for a door, safe or app lock? Use the PIN Code Generator.
• For an API key or a secret value in a test environment, use the Random Token Generator.
• Before tapping a text message link that claims to come from a courier or bank, run it through the Suspicious Link Checker.
• To catch a mistyped card number in a form, use the Card Number Format Checker.
• Locked out of your authenticator app? If you backed up your own secret key, the TOTP Code Generator can produce the code.

Things to keep in mind

• The link checker looks only for some well-known red flags. A clean result does not prove a link is safe, so contact the company through its official channel if a message seems off.
• A number that passes the Luhn check is only mathematically consistent. It does not show that the card is real, active or yours.
• If you forget the password on a note you locked with the Text Encryptor, there is no way to open it. Keep that password somewhere separate and safe.
• Your TOTP secret is the second key to your account. Never share it, and do not leave it sitting in your photo gallery as a screenshot.

What these tools cannot do

Security tools make good habits easier, but they do not protect you on their own. A strong generated password does not help if you reuse it on several sites, and a password that looks strong may still have appeared in an earlier data breach. The real difference comes from combining a separate password for every site, a password manager and two-factor authentication on important accounts.