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@OpenZeppelin

OpenZeppelin

The standard for secure blockchain applications

Welcome to the OpenZeppelin GitHub 👋

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Get Started

OpenZeppelin provides secure smart contract libraries and tools across multiple blockchain ecosystems.

Start from the documentation to choose your ecosystem, libraries, and workflows.

Explore Highlighted Repositories by Ecosystem:

EVM (Solidity)

Arbitrum Stylus (Rust)

Confidential (Zama FHEVM)

Midnight

Polkadot

Starknet (Cairo)

  • cairo-contracts: cairo library for secure smart contract development on Starknet.

Stellar (Soroban)

Sui (Move)


OpenZeppelin Tools and Learning

  • Contracts Wizard: instantly generate boilerplate contracts to bootstrap your next dApp.
  • Ethernaut: interactive wargame that turns you into a Solidity security expert.
  • Monitor: Infrastructure tool for monitoring blockchain events and transactions.
  • Relayer: Infrastructure for relaying transactions on EVM and Non-EVM networks.
  • Role Manager: Open source UI tool providing your users a way to easily assess the status of the roles with your smart contracts.
  • UI Builder: Open source tool for creating UI forms for contracts.

Build with AI

OpenZeppelin provides AI-ready resources for modern development workflows.

  • OpenZeppelin Skills: agent skills for secure smart contract development with OpenZeppelin Contracts libraries.
  • Contracts MCP: allowing AI agents to generate smart contracts using OpenZeppelin Contracts libraries.

Getting Started & Resources

  1. Documentation: learn how to integrate our libraries and tools into your project.
  2. Forum: ask questions, share insights, and get help from our community.
  3. Security Center: all the security details you need to know about OpenZeppelin Contracts
  4. Dune Dashboard: real-time metrics and usage data for OpenZeppelin Contracts across various chains.

Stay Connected

  • X: Follow us for the latest announcements and updates.
  • Blog: Dive deeper into our latest articles, security best practices, and community updates.
  • Careers: Want to build and secure open-source tools and protocols that protect the open economy? We’re hiring!

Pinned Loading

  1. openzeppelin-contracts openzeppelin-contracts Public

    OpenZeppelin Contracts is a library for secure smart contract development.

    Solidity 27.3k 12.4k

  2. openzeppelin-contracts-upgradeable openzeppelin-contracts-upgradeable Public

    Upgradeable variant of OpenZeppelin Contracts, meant for use in upgradeable contracts.

    JavaScript 1.2k 516

  3. openzeppelin-upgrades openzeppelin-upgrades Public

    Plugins for Hardhat and Foundry to deploy and manage upgradeable contracts on Ethereum.

    TypeScript 660 288

  4. ethernaut ethernaut Public

    Web3/Solidity based wargame

    Solidity 2.3k 787

  5. cairo-contracts cairo-contracts Public

    OpenZeppelin Contracts written in Cairo for Starknet, a decentralized ZK Rollup

    Rust 909 397

  6. rust-contracts-stylus rust-contracts-stylus Public

    A library for secure smart contract development written in Rust

    Rust 146 79

Repositories

Showing 10 of 194 repositories
  • OpenZeppelin/ethernaut-leaderboard's past year of commit activity
    JavaScript 14 MIT 12 2 4 Updated Oct 1, 2026
  • contracts-wizard Public

    Interactive smart contract generator based on OpenZeppelin Contracts.

    OpenZeppelin/contracts-wizard's past year of commit activity
    TypeScript 294 AGPL-3.0 186 15 (1 issue needs help) 29 Updated Oct 1, 2026
  • ethernaut Public

    Web3/Solidity based wargame

    OpenZeppelin/ethernaut's past year of commit activity
    Solidity 2,336 AGPL-3.0 787 32 43 Updated Oct 1, 2026
  • uniswap-hooks Public

    Solidity library for secure and modular Uniswap hooks.

    OpenZeppelin/uniswap-hooks's past year of commit activity
    Solidity 127 MIT 58 17 9 Updated Sep 30, 2026
  • openzeppelin-upgrades Public

    Plugins for Hardhat and Foundry to deploy and manage upgradeable contracts on Ethereum.

    OpenZeppelin/openzeppelin-upgrades's past year of commit activity
    TypeScript 660 MIT 288 98 (6 issues need help) 34 Updated Oct 1, 2026
  • Event-Scanner Public

    A lightweight highly performant event scanner built in rust

    OpenZeppelin/Event-Scanner's past year of commit activity
    Rust 19 MIT 7 21 1 Updated Sep 30, 2026
  • Robust-Provider Public

    Timeout-aware, auto-retrying, failover-ready RPC provider wrapper for Alloy built in Rust

    OpenZeppelin/Robust-Provider's past year of commit activity
    Rust 6 MIT 4 11 1 Updated Sep 30, 2026
  • guardian Public

    Backup, synchronization, and coordination layer for private accounts.

    OpenZeppelin/guardian's past year of commit activity
    Rust 10 AGPL-3.0 20 36 19 Updated Sep 30, 2026
  • openzeppelin-community-contracts Public

    Solidity library of smart contracts from the OpenZeppelin Community

    OpenZeppelin/openzeppelin-community-contracts's past year of commit activity
    Solidity 92 MIT 44 15 42 Updated Sep 30, 2026
  • openzeppelin-relayer Public

    OpenZeppelin Relayer

    OpenZeppelin/openzeppelin-relayer's past year of commit activity
    Rust 153 AGPL-3.0 75 15 48 Updated Sep 30, 2026