Public GitHub footprint of Meta

Easy to maintain open source documentation websites.

A library that provides an embeddable, persistent key-value store for fast storage.

An open-source C++ library developed and used at Facebook.

Zstandard - Fast real-time compression algorithm

Lexical is an extensible text editor framework that provides excellent reliability, accessibility and performance.

Adds static typing to JavaScript to improve developer productivity and code quality.

Tool for producing high quality forecasts for time series data that has multiple seasonality with linear or non-linear growth.

Relay is a JavaScript framework for building data-driven React applications.

A virtual machine for executing programs written in Hack.

An Android library for managing images and the memory they use.

A static analyzer for Java, C, C++, and Objective-C

Watches files and records, or triggers actions, when they change.

A desktop debugging platform for mobile developers.

An open source design system that's fully customizable and agent ready

Stetho is a debug bridge for Android applications, enabling the powerful Chrome Developer Tools and much more.

A JavaScript engine optimized for running React Native.

An extension that allows inspection of React component hierarchy in the Chrome and Firefox Developer Tools.

StyleX is the styling system for ambitious user interfaces.

A JavaScript codemod toolkit.

Chisel is a collection of LLDB commands to assist debugging iOS apps.

A collection of C++ HTTP libraries including an easy to use HTTP server.

Used to integrate the Facebook Platform with your iOS & tvOS apps.

A declarative framework for building efficient UIs on Android.

Performant type-checking for python.

A Scalable, User-Friendly Source Control System.

A fast type checker and language server for Python

Used to integrate Android apps with Facebook Platform.

A bytecode optimizer for Android apps

A React-inspired view framework for iOS.

A library that enables dynamically rebinding symbols in Mach-O binaries running on iOS.

idb is a flexible command line interface for automating iOS simulators and devices

PathPicker accepts a wide range of input -- output from git commands, grep results, searches -- pretty much anything. After parsing the input, PathPicker presents you with a nice UI to select which files you're interested in. After that you can open them in your favorite editor or execute arbitrary commands.

A framework for finding JavaScript memory leaks and analyzing heap snapshots

Runtime type checking for React props and similar objects

Build system, successor to Buck

A Haskell library that simplifies access to remote data, such as databases or web-based services.

Language, engine, and tooling for expressing, testing, and evaluating composable language rules on input strings.

iOS library to help detecting retain cycles in runtime.

Source transformer enabling ECMAScript 6 generator functions in JavaScript-of-today.

Mcrouter is a memcached protocol router for scaling memcached deployments.

Intermediate Graphics Library (IGL) is a cross-platform library that commands the GPU. It provides a single low-level cross-platform interface on top of various graphics APIs (e.g. OpenGL, Metal and Vulkan).

A novel take on lossless data compression

Wangle is a framework providing a set of common client/server abstractions for building services in a consistent, modular, and composable way.

Adaptive Experimentation Platform

Facebook's branch of Apache Thrift, including a new C++ server.

A collection of utility libraries used by other Meta JS projects.

An implementation of the QUIC transport protocol.

Python SDK for Meta Marketing APIs

Pluggable in-process caching engine to build and scale high performance services

Native code loader for Android

Trust & Safety tools for working together to fight digital harms.

A security focused static analysis tool for Android and Java applications.

A Rust implementation of the Starlark language

Fatal is a library for fast prototyping software in modern C++. It provides facilities to enhance the expressive power of C++. The library is heavily based on template meta-programming, while keeping the complexity under-the-hood.

Facebook Open Switching System Software for controlling network switches.

Distributed platform for building autonomic network functions.

Simplified executable deployment

OpenBMC is an open software framework to build a complete Linux image for a Board Management Controller (BMC).

SPARTA is a library of software components specially designed for building high-performance static analyzers based on the theory of Abstract Interpretation.

Lexical iOS is an extensible text editor framework that integrates the APIs and philosophies from Lexical Web with a Swift API built on top of TextKit.

Meta's Time libraries

Node.js SDK for Meta Marketing APIs

Open source chef cookbooks.

Meta's Client Platform Engineering tools. Some of the tools we have written to help manage our fleet of client systems.

Meta Wearables Device Access Toolkit for iOS

The facebook sdk for unity.

Java SDK for Meta Marketing APIs

QuickLayout is a production-ready declarative layout library for UIKit. Built for large-scale applications, it combines expressive Swift APIs with a lightweight layout engine to deliver high performance reliability, and long-term maintainability.

Meta Wearables Device Access Toolkit for Android

WebXR made simple. Full-featured framework with interactions, locomotion, and spatial UI. Powered by Three.js.

eBPF-based packet filtering framework

An implementation of an auditable key directory

The official plugin from Meta. This repository is now officially owned by Meta's Partner Engineering team. We welcome and encourage contributions from the community.

A Tacacs+ Daemon tested on Linux (CentOS) to run AAA via TACACS+ Protocol via IPv4 and IPv6.

AI-assisted development toolkit for building web applications on Meta Ray-Ban Display glasses.

Welcome to the Meta Threat Research Indicator Repository, a dedicated resource for the sharing of Indicators of Compromise (IOCs) and other threat indicators with the external research community

Sets of libraries and tools to write applications and libraries mixing OCaml and Rust. These libraries will help keeping your types and data structures synchronized, and enable seamless exchange between OCaml and Rust

A Raft Library in C++ based on the Raft implementation in Apache Kudu

bunnylol is a tool for writing smart bookmarks. Use in your browser, or on the command-line

SQuangLe is a C++ API for accessing MySQL servers

OS X Homebrew formulas to install Meta open source software

fb303 is a core set of thrift functions that provide a common mechanism for querying stats and other information from a service.

Lifeguard is a static analyzer to detect Lazy Imports incompatibilities and ease the adoption overhead for Lazy Imports in Python

Kernel-level eBPF sandbox for securing LLM agent tool calls made through the Model Context Protocol (MCP)

Prelude for the Buck2 project

This project enabled intercepting and virtualizing the browser API

A pre-commit hook for Pyrefly.

Conversions API parameter builder to help enhance the parameter qualities for Conversions API events

Security-focused Python Static Analyzer

Rebalancer is a domain-specific language and tool for specifying and solving assignment problems (eg, putting balls in boxes with complex rules).

A low-level haptic rendering and data processing library based on a universal format.

Meta's BGP (Border Gateway Protocol) routing daemon for large-scale data center networks, built as part of the FBOSS forwarding stack.

Agentic tools plugin and skills

Shims to convert Meta internal buck2 macros/targets for open source build compatibility.

TAAC (Test-As-A-Config) is a thrift-defined integration test framework for validating datacenter network products and platforms.

LightweightVK is a deeply refactored bindless-only fork of IGL which is designed to run on top of modern Vulkan 1.3 with optional mesh shaders and ray tracing support. Meta's version is a fork of the upstream LightweightVK, tailored for better compatibility with current and upcoming Meta products.

Official WordPress plugin for embedding Threads, Instagram, and Facebook content. Simply paste a Threads, Instagram, or Facebook URL into the WordPress editor and get a rich embed. No access tokens or configuration required.

NanoCMD is a Go library and server for Apple MDM command workflows

NanoDEP is a set of tools and a Go library powering them for communicating with Apple's Device Enrollment Program (DEP) API servers.

NanoHUB adapts and unifies NanoMDM, NanoCMD, and KMFDDM into a single MDM server. Intended as a library it includes a reference command-line server as well.