If you have many passwords this tool should help you. This can read and save data from and to .json file
To add site data just simple type "add" and type name of page, username, email and password
To read data just type page name and if site with this name exsists this will be show. If not it printing an error.
If you add an object with 'null' value it will be write like (for example "username":"null"). If you know how to fix it please contact!