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OpenZeppelin Contracts

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OpenZeppelin Contracts — reusable smart-contract components with a security focus

OSS health 96
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Discovery score is an unbounded weighted, log-compressed index of stars, watchers, forks, and contributors. Growth momentum is its change over the observed period; OSS health is a 0–100 score from available repository recency, Community Health, and release data.

Stars
27,240
Primary language
Solidity
License
MIT
Repository last updated
Sep 12, 2026

Overview

OpenZeppelin Contracts is a Solidity library of community-vetted smart-contract components. It combines standards such as ERC-20 and ERC-721 with role-based access control, signature verification, and other reusable utilities.

Features and best fit

Based on official documentation; not hands-on tested · Content checked:

Compose contracts from token standards, permissions, and utilities

It provides token implementations including ERC-20, ERC-721, ERC-1155, and ERC-6909, access control for privileged actions, and utilities for math, signature verification, and payments. Contracts Wizard offers an interactive starting point for generating a configuration.

Sources: [1]

For starting Solidity contracts from established standards and components

It fits projects that prefer composing public APIs over reimplementing tokens, NFTs, permissioned actions, and signature handling from scratch. Import only what is needed, then add tests and review for the project's business rules and threat model.

Sources: [1]

Separate audited releases, upgrade compatibility, and project-specific audits

The npm latest tag is audited, dev is final but unaudited, and next is a release candidate. The README warns against using master for git installations, and upgradeable-contract storage layouts must not be assumed compatible across major versions. Using the library does not replace a security audit of the resulting system.

Sources: [1][2]

Official sources

  1. [1]OpenZeppelin Contracts README(2026-09-13)
  2. [2]OpenZeppelin Contracts GitHub repository(2026-09-13)
Supplemental curator note

Selected as a library with strong technical authority in smart-contract topics but limited visibility in general-purpose curation.

Growth

Growth trends · Last 30 days

27,240 Stars

Trend data is still being collected.

Development activity

Last 90 days · weekly

Commits (last 30 days)
33
Open PRs
135

Development activity is still being collected.

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GitHub data

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GitHub Topics

  • ethereum
  • solidity
  • evm
  • security
  • smart-contracts
Stars
27,240
Forks
12,398
Watchers
642
Open issues
240
Primary language
Solidity
License
MIT
Repository last updated
Sep 12, 2026
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