Line0

Backend development is full of repetitive setup work — scaffolding projects, configuring routes, handling security, writing documentation. Line0 is an AI pair programmer built specifically for backend developers, letting you build fully working Express.js backend API services in minutes instead of hours.

With a 2-way GitHub integration, an in-browser code editor, and prompt enhancement capabilities, Line0 understands what you're trying to build and generates production-ready code that follows backend best practices for project structure, security, and documentation. Natural language input lets you describe functionality in plain English, and organized chats per feature help maintain context across your project.

Future updates will bring support for additional backend frameworks and languages, a built-in API client for in-browser testing, hot-reloads, and live database previews — making Line0 a backend development environment that keeps getting better.