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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 | sh
web3j new
For Windows, follow these instructions

Head to the docs for more information

Web3j Project Overview

The latest Project Overview

Read here

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
ethereum foundation

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

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.

Let's talk!

Book a free consultation session with us now.

Let's talk!

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