LastPass is a password management browser extension that securely stores and automatically fills login credentials for websites and applications. The extension uses strong encryption to protect sensitive information while enabling convenient access through a master password or biometric authentication. The core functionality allows users to save credentials when logging into websites, which LastPass can then automatically fill on subsequent visits. The password generator feature creates unique, complex passwords for new accounts, eliminating the security risk of password reuse across multiple sites. LastPass includes secure notes for storing sensitive information beyond login credentials, such as WiFi passwords, software licenses, or personal identification numbers. The browser extension integrates seamlessly with the LastPass mobile application, ensuring that users have access to their credentials across all devices. The free version supports unlimited password storage on one device type, while premium plans include cross-device synchronization, secure file storage, emergency access for trusted contacts, and priority customer support. LastPass for families and businesses provides shared folders with customizable permissions for collaborative password management.