Usually difficult passwords are saved to password managers
But you have to memorize some passwords like 1Password Master Key.
This tool helps you create a difficult and memorized password

The browser has a unique fingerprint like a person's fingerprint
Using this, the website can specify users
This tool shows the finger prints of the browser in use
To prevent finger print tracking, use an extension like Canversblocker or use a Tor browser

Before sharing text containing confidentiality online, you can encrypt text using this tool
To decrypt the text, you need a key to the encryption key set by the person sent by the person

Create and use a temporary profile for a service that seems to leak my personal information or wants to store my real information
This tool is create a temporary alternative name and nickname, age, profile picture