MetaMask is a leading self-custodial wallet and gateway to blockchain apps, trusted by millions worldwide. It combines key vault, secure login, and token exchange functionalities, available as a browser extension and mobile app. MetaMask enables users to buy, store, send, swap tokens, and connect to decentralized applications. It prioritizes data ownership, generating passwords and keys locally on the user’s device. Its user-friendly interface and robust security features make it a popular choice for accessing the decentralized web and managing digital assets.