A Toolbox for Developers

The story and mission behind Box4Dev.

Our Story: From a Library to a Full Platform

Box4Dev came from a real need in software development: getting valid Brazilian test data. To solve that, the gerador-br NPM package was created in 2021—an open-source library for Node.js. In 2024 the project was made public and quickly gained community adoption.

We saw that demand for fake data was not limited to automated tests. Often a developer, QA, or student needs a valid CPF or CNPJ quickly, without writing code. What started as an NPM package became Box4Dev: a web platform that delivers the same robust gerador-br logic in a fast, accessible, and free interface for everyone.

What Is Box4Dev Today?

The name "Box4Dev" reflects our broader mission: to be an essential "toolbox" for tech professionals every day. Today the project goes far beyond generators and includes:

  • Online tools: Document generators/validators, CNAB file viewer/converter.
  • VS Code extensions: Tools integrated into your editor to monitor APIs and speed up test creation.
  • NPM packages: Open-source libraries to integrate directly into your Node.js projects.
  • Chrome extensions: Utilities that bring Box4Dev to your browser, making it easier to fill forms and validate data.

About the Creator

Photo of Marcelo Lourenço

Marcelo Lourenço is the creator and lead maintainer. As a developer passionate about clean code, test automation, and open-source solutions, he continues to evolve both the NPM package and the web platform.

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Frequently Asked Questions (FAQ)

Our mission is to build and maintain a suite of free, open-source online tools that solve real problems for developers, software testers (QAs), and technology students in Brazil—and eventually worldwide.