How to check if your email, username, or Password has been exposed

 1st; Goto https://breachdirectory.org/

2nd; Type your Email or Username

3rd; it will display the hash code for your email password

You can also check your Password in how many times you used it to expose;

I tried to search for the old password that I used many times on different website here is the results;

That's why you need to change your password every you use it on a different computer or website. 

you must create a different password for another website.

I also try to search for my Gmail account here are the results;

You can try to decrypt the hash code in https://md5decrypt.net/ 

there are too many online decryption tools you can find online.