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About Viem
viem is the modern TypeScript interface for Ethereum. It's the low-level library that powers wagmi—smaller, faster, and more modular than ethers.js with first-class TypeScript support.
Built by the wagmi team, viem provides everything you need for Ethereum development: wallet interactions, contract calls, transaction handling, and encoding/decoding. The API is intuitive and tree-shakeable.
viem is becoming the default choice for new TypeScript Ethereum projects. Better bundle sizes, stricter types, and cleaner abstractions than legacy libraries.
Frequently Asked Questions
viem is the low-level TypeScript library for Ethereum. It handles contract calls, transactions, encoding, and wallet connections. Think of it as the modern replacement for ethers.js with better TypeScript and smaller bundles.
viem is smaller (35kb vs 120kb+), has stricter TypeScript, and is more modular. ethers.js has longer history and more examples online. For new projects, viem is generally preferred. Migration guides exist.
viem is the low-level Ethereum library. wagmi builds React hooks on top of viem. Use wagmi for React apps, viem directly for non-React projects or custom needs. They work together.
viem has migration guides in their docs. Most concepts map directly—providers become clients, Contract becomes getContract. The API is similar but cleaner. Gradual migration is possible.
Yes. viem powers major dApps through wagmi. It's maintained by experienced developers and has comprehensive test coverage. Production use is widespread and growing.