MetaMask is the world's leading self-custodial crypto wallet available as a browser extension and mobile app, enabling millions of users to securely manage cryptocurrencies, interact with dApps, trade NFTs, and explore Web3 across Ethereum and other blockchains.

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🚀 Overview

MetaMask is a comprehensive crypto wallet that acts as your "home onchain," providing a seamless gateway to blockchain networks without the need to run a full node. It solves the core problem of accessibility in Web3 by injecting a wallet interface into browsers, allowing users to sign transactions, manage assets, and connect to decentralized applications effortlessly.

Built for everyone from crypto newcomers—who benefit from interactive MetaMask Learn lessons—to seasoned traders and developers, it supports buying, selling, swapping, earning yield, NFT trading, and more across 100+ networks.

Originally developed to bring Ethereum to the masses, MetaMask now powers over 5 billion transactions and continues to evolve with features like Snaps for extensibility, prioritizing user privacy and security.

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✨ Key Features

• Multi-chain Wallet Management: Buy, swap, and trade tokens (BTC, ETH, SOL, etc.), perpetuals, and earn passive income—all in one place with aggregated best rates.
• dApp Connectivity & NFTs: Easily connect to thousands of dApps, collect, mint, and trade NFTs.
• Advanced Security & Privacy: Real-time threat monitoring, frontrun protection, Wallet Guard, and user-controlled data sharing.
• Optional: MetaMask Snaps for custom features like new chains or account types; MetaMask Metal Card for US users.

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🛠 Tech Stack

• Frontend: TypeScript, JavaScript, SCSS, Tailwind CSS, Webpack, Babel
• Backend: N/A (client-side with RPC providers)
• Database: Browser local storage
• Auth: Self-custodial (seed phrase)
• Hosting: Chrome Web Store, Firefox Add-ons, Apple/Google App Stores; built with Node.js, Yarn

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👥 Who Is This For?

This project is useful for:

• Developers who want to connect dApps to user wallets via SDK
• Crypto users looking for a secure, multi-chain wallet
• NFT collectors and Web3 explorers building portfolios

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📸 Screenshots / Demo

• Live demo: https://metamask.io (download extension or app)
• GitHub: https://github.com/MetaMask/metamask-extension

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🔥 Project Status

• 🟢 Actively building

Last updated: 2026-03-24

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❓ FAQ

Is this project free?

Yes (completely free to download and use; optional in-app purchases for fiat on-ramps).

Is the source code available?

Yes — https://github.com/MetaMask/metamask-extension (browser extension) and https://github.com/MetaMask/metamask-mobile

Can I contribute?

Yes—review contributor docs at https://github.com/MetaMask/contributor-docs, open issues/PRs following guidelines, or provide feedback on the community forum.

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📬 Contact & Links

• Website: https://metamask.io
• GitHub: https://github.com/MetaMask
• Twitter/X: https://x.com/MetaMask
• Email: support@metamask.io (via support.metamask.io)

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