비밀번호 뭐였지? is a free Chrome add-on designed to simplify password management for users. It allows you to securely store and manage all your usernames and passwords with just one master password. The application supports various types of sensitive information, including passwords, account numbers, security cards, and more, ensuring a comprehensive solution for personal data management.

This tool offers features such as sorting options by name, registration date, or frequency of use, making it easy to find what you need. It also includes a group management feature for accounts, a search function, and a visually distinct design using icons. With support for dark mode and easy login through Google, Kakao, or Apple accounts, 비밀번호 뭐였지? provides a user-friendly experience while maintaining high security with AES256 and RSA2048 encryption.