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The Best Web3 Developer Tools in 2026
Curated by Musharof Chowdhury · Last reviewed · How we pick
Web3 tooling has matured. Building a decentralised app now looks much like any other web project: a framework for writing and testing smart contracts, a library to talk to the chain from your front end, a node provider and a wallet connection.
This shortlist focuses on Ethereum and other EVM-compatible chains, where the tools are most established. Every pick is widely used in production and free to start with.
Our shortlist
Foundry
Best for writing and testing smart contractsA fast smart contract toolkit where you write tests in Solidity, now the default choice for many teams.
Hardhat
Best for JavaScript and TypeScript developersA flexible Ethereum development environment with a large plugin ecosystem and tests written in TypeScript.
OpenZeppelin Contracts
Best for secure smart contract building blocksAudited, widely used implementations of tokens, access control and upgradeable contracts.
viem
Best for a modern TypeScript Ethereum libraryA lightweight, type-safe library for reading from and writing to the chain, used under the hood by many wallet kits.
ethers.js
Best for a proven JavaScript Ethereum libraryA complete, well-documented library for wallets, contracts and providers, with a long track record.
Alchemy
Best for node access and enhanced APIsReliable RPC access to many chains plus NFT, token and webhook APIs, with a free tier.
thirdweb
Best for shipping a dApp quicklySDKs, prebuilt contracts and in-app wallets that remove much of the boilerplate from building a dApp.
MetaMask
Best for a browser wallet for testing and useThe most widely supported Ethereum wallet, essential for testing how your dApp works for real users.
WalletConnect
Best for connecting many walletsThe open protocol that lets users connect hundreds of mobile and desktop wallets to your dApp.
Etherscan
Best for inspecting transactions and contractsThe standard block explorer for checking transactions, reading verified contract code and debugging.
Frequently asked questions
What tools do I need to build a Web3 app?
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A smart contract framework such as Foundry or Hardhat, audited building blocks from OpenZeppelin, a front-end library such as viem or ethers.js, a node provider such as Alchemy and a wallet connection through MetaMask and WalletConnect.
Foundry or Hardhat: which should I use?
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Foundry is faster and lets you write tests in Solidity, which many teams now prefer. Hardhat suits developers who want to write tests and scripts in TypeScript and rely on its plugin ecosystem. Both are free and widely used.
Should I use viem, ethers.js or web3.js?
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Use viem or ethers.js. viem is the modern, type-safe choice and ethers.js is mature and well documented. web3.js was sunset by its maintainers in 2025 and is not recommended for new projects.
How do I keep smart contracts secure?
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Build on audited libraries such as OpenZeppelin, write thorough tests including fuzz tests, run static analysis tools and get an independent audit before deploying contracts that will hold real value.
Browse every Web3 resource
All 18 listings in this category, submitted by the community.
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