Ethereum OpenZeppelin

Build securely on Ethereum
with OpenZeppelin

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.

OpenZeppelin Solidity Contracts

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.

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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

Contracts Wizard

Generate secure Ethereum smart contracts in seconds. Configure modules, preview the code, and export directly into your workflow.

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Contracts Wizard

Professional Services

Smart Contract Security Audit

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.

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Blockchain Infrastructure Audit

Strengthen your protocol's offchain infrastructure through comprehensive audits of node implementations, bridge components, and more, ensuring robust foundations for your operations.

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ZKP Audit

Validate your ZK protocols on Ethereum through comprehensive reviews of circuit design, prover systems, and verification contracts, guaranteeing cryptographic integrity and robust integration.

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Content to Help You Build

Inside Ethereum's Engine: How the Execution Layer Actually Works
The Notorious Bug Digest #5: Post EIP-7702 Pitfalls, JIT Penalty Rebates, and Manipulation of Recursive Functions
Beyond Zero Knowledge: How Fully Homomorphic Encryption Enables Private Shared State
The Notorious Bug Digest #4
Six Questions To Ask Before Writing a Uniswap v4 Hook
The Notorious Bug Digest #3
Beyond Smart Contracts: A Deep Dive into Blockchain Infrastructure Security Auditing
ERC-4626 Tokens in DeFi: Exchange Rate Manipulation Risks
The Notorious Bug Digest #2
The Notorious Bug Digest #1
From Stage 0 to Stage 1: Security Council Best Practices in Rollup Governance
Web3 Security Auditor's 2024 Rewind
What is a Smart Contract Audit: Lessons from OpenZeppelin’s 700+ Audits
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