OpenZeppelin

Secure smart-contract standard library

contractssecuritystandardlibrary

openzeppelin.comUpdated 2026-11-02

CoinNav lists publicly available official entries only and does not endorse any third-party platform. Verify the domain before visiting or transferring funds.

About

OpenZeppelin is the industry-standard secure contract library — its ERC20/ERC721 implementations and access-control components ship in most projects — with audits and Defender operations services on top.

Inheriting its standard contracts avoids reinventing basics; design upgradeable logic carefully. Audits are pricey — small projects can start with community tooling.

Main uses

Standard contracts
Access control
Audit services

Site info

CategoryDevelopers

TypeContract library / audits

LanguagesEnglish

AccessCode library / Web

FeesFree lib / paid audits

FAQ

Why is OpenZeppelin's contract library everywhere?

Long-audited standard implementations — ERC20, Ownable and friends — reduce hand-rolled vulnerabilities.

Does using OZ make my contract safe?

The library is solid, but composition and access control can still be wrong. Upgrade and initializer misuse has bitten real projects.

How do I reach the official OpenZeppelin site safely?

The “Visit official site” button on this page points to OpenZeppelin’s official address: openzeppelin.com. Fake clones are common in crypto — verify the domain and bookmark this page or the official URL.

Does OpenZeppelin cost money?

Free lib / paid audits

Visit official site ↗