Build Secure Smart Contracts in Solidity

OpenZeppelin Contracts helps you minimize risk by using battle-tested libraries of smart contracts for Ethereum and other EVM blockchains. It includes the most used implementations of ERC standards.

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Start building with Contracts Wizard for Solidity

Total value transferred
via OpenZeppelin Contracts

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$20,460,337,760,351T

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Secure Code

Reduce the risk of vulnerabilities in your applications by using standard, tested, community-reviewed code

Focused on Security

Using top level standard contracts security patterns and best practices.

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Modular Approach

Simple, robust code.
Easy collaboration and auditing.

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Open Source

Community-driven. Used by the biggest players in the industry.

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Build Secure Smart Contracts in Solidity

$20,460,337,760,351T

Reduce the risk of vulnerabilities in your applications by using standard, tested, community-reviewed code

Focused on Security

Modular Approach

Open Source

The world’s leading projects build with OpenZeppelin Contracts

Extend Contracts with Defender Cloud Services

Join the largest community of smart contract developers