

OpenZeppelin equips developers on Ethereum with audited libraries, upgrade plugins, and security tooling that accelerate development, minimize risk, and power the most trusted applications in Web3.
A complete suite of audited contracts and utilities for Ethereum. Developers rely on these libraries to build securely, reduce complexity, and scale applications with confidence on the world’s leading smart contract platform.
Docs → Github →More than
$15.35 trillion
Total Value Transferred through OpenZeppelin Contracts on Ethereum
More than
$231 billion
Total Value Locked in OpenZeppelin Contracts on Ethereum
Generate secure Ethereum smart contracts in seconds. Configure modules, preview the code, and export directly into your workflow.
Try Wizard →Deploy and manage upgradeable contracts on Ethereum with confidence using Hardhat and Foundry plugins. Automate proxy deployments, enforce rigorous safety checks, and integrate onchain verification.
Explore Upgrades Plugins →Integrate with AI development environments to generate and deploy Ethereum contracts using OpenZeppelin’s audited libraries and standards.
Try Contracts MCP →Create a ready-to-use front end for any Ethereum contract in seconds. Select the function, generate a React UI with wallet connection and multi-network support, and export a complete application.
Try UI Builder →Verify every multisig transaction before signing. Safe Utils lets you check transaction hashes on Ethereum, protecting teams from malicious or unexpected actions.
Try Safe Utils →Define role-based permissions with flexible hierarchies and fine-grained admin rights. Perfect for DAOs, multisigs, and custom governance frameworks on Ethereum.
Try Access Control →Enterprise-grade security and compliance for institutional adoption
Secure your Ethereum application with comprehensive audits that protect DeFi protocols, tokenization protocols, and more, delivering industry-leading safety standards that empower developers and institutions to scale confidently.
Talk to an Expert → Read More →Strengthen your protocol's offchain infrastructure through comprehensive audits of node implementations, bridge components, and more, ensuring robust foundations for your operations.
Talk to an Expert → Read More →Validate your ZK protocols on Ethereum through comprehensive reviews of circuit design, prover systems, and verification contracts, guaranteeing cryptographic integrity and robust integration.
Talk to an Expert → Read More →Content to Help You Build