MetaMask is a non-custodial cryptocurrency wallet that allows users to store, manage, and interact with Ethereum-based assets (such as ETH and ERC-20 tokens). It is available as a MetaMask is a non-custodial cryptocurrency wallet and gateway to the Ethereum blockchain and other EVM-compatible networks. The MetaMask Chrome Extension allows users to manage MetaMask Extension is a secure, user-friendly browser plugin designed for managing cryptocurrencies and interacting with decentralized applications (dApps).