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OpenZeppelin Smart Contracts
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Battle-tested libraries and tools for smart contract development
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📜
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Solidity Contracts
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Core library for Ethereum & EVM chains
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⬆️
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Upgrades Plugins
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Safe upgrade patterns for contracts
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🎯
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+ Contracts Wizard + ↗ +
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Interactive contract builder
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🤖
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+ Contracts MCP + ↗ +
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AI assistant for smart contracts
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Open Source Tools
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Tools for building, testing, and managing contracts in production
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🔄
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Relayer
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Meta-transactions and gasless operations
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📊
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Monitor
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Real-time alerts for contract events
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🔧
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UI Builder
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Create UIs for deployed contracts
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🛡️
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Defender
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Secure operations platform
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Blockchains and Developer Ecosystems

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Choose your blockchain platform to explore available contracts and tools

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⟠
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Ethereum & EVM
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Solidity smart contracts for Ethereum and EVM-compatible chains
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🔺
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Starknet
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Essential contracts library written in Cairo for Starknet
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🦀
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Arbitrum Stylus
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Essential contracts library for Arbitrum Stylus written in Rust
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🦄
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Uniswap Hooks
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Advanced Uniswap V4 hooks in Solidity
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🔐
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Zama FHEVM
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Fully homomorphic encryption contracts for confidential smart contracts
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⭐
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Stellar
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Soroban contracts library for Stellar
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🌙
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Midnight
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Privacy-preserving smart contracts for Midnight blockchain
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⬡
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Polkadot
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ink! smart contracts for Polkadot and Substrate chains
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Learn

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Comprehensive guides for every step of your development journey

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1
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Setting Up a Node Project

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Install node, npm, and the basic libraries for web3 development.

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2
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Developing Smart Contracts

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Write and compile your first Solidity contracts, using the building blocks from the OpenZeppelin Contracts library.

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3
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Deploying and Interacting

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Deploy your contracts to a local blockchain and send your first transactions using the console.

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4
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Writing Automated Tests

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Unit test your contracts with assertions from OpenZeppelin Test Helpers and test using the OpenZeppelin Test Environment.

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5
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Connecting to Public Test Networks

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Set up a staging environment by deploying your app to a public Ethereum testnet.

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6
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Upgrading Smart Contracts

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Change the code of your deployed contracts to add new features or fix bugs, using OpenZeppelin Upgrades Plugins.

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7
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Preparing for Mainnet

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All the boxes you need to check before taking your project to production on the main Ethereum network.

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🎮
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Interactive Learning
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Ethernaut CTF

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Learn smart contract security by hacking! A Web3/Solidity based capture-the-flag game where each level is a smart contract that needs to be 'hacked'. Perfect for learning vulnerabilities and security best practices through hands-on challenges.

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→
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Community & Support

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Connect with the community for technical discussions and support

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💬
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Forum

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Deep technical discussions, architectural questions, and detailed support. Best place for in-depth conversations about smart contract development, security patterns, and implementation details.

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✈️
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Telegram

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Quick questions, community support, and real-time chat. Join our active community for faster responses, general help, announcements, and casual discussions about OpenZeppelin tools.

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