Develop on Ethereum with the JVM

Web3j makes it easy to build Ethereum applications with Java and Android

Getting started

Run the following in your terminal, then follow the onscreen instructions

curl -L get.web3j.io | sh
web3j new

For Windows, follow the instructions here

Head to the docs for more information

Web3j is a lightweight, highly modular, reactive, type safe Java and Android library for working with Smart Contracts and integrating with Ethereum blockchains.

This allows you to work with Ethereum blockchains, without the additional overhead of having to write your own integration code for the platform.

Some of the companies building with Web3j

We're grateful for the funding Web3j has received from

Speed up your Blockchain development

Epirus integration

Web3j integrates seamlessly with the Epirus Blockchain Explorer

Type safe

Web3j provides full type safe access  to your blockchain applications

Build tool integration

Plugins for leading build tools to simplify the developer experience

Versatile CLI

Create projects to work with new or import existing decentralised apps in a single command with the Web3j CLI

Powerful integration testing

Simple to use framework for automated integration testing against networks   within your IDE

Commercially supported OSS

Web3j is 100% open source and maintained by Web3 Labs

Start building with Web3j

Contribute to Web3j

Documentation

Code

Consulting & Commercial Support

Web3 Labs can offer the following services for Web3j

Consulting services

Strategic advisory and project delivery

Training workshops

Hands-on workshops covering blockchain and smart contract development with Web3j

Commercial support

Dedicated support for your blockchain applications

Request a consultation to find out more.