Build an AI Changelog Generator SaaS with Next.js & GPT

Writing changelogs is tedious. Developers spend hours summarizing git commits into user-friendly release notes that nobody enjoys writing. In this tutorial, you'll build a SaaS application that automatically transforms raw git commits into polished, categorized changelogs using Next.js 14 and the OpenAI GPT API .

By the end, you'll have a deployable product that accepts a GitHub repository URL, fetches recent commits, and generates beautiful changelogs with a single click. This is a real-world project you can monetize or add to your portfolio.

What You'll Learn

How to build a full-stack SaaS app with Next.js 14 App Router

How to integrate the GitHub API to fetch commit histories

How to use OpenAI's GPT API to generate structured changelogs

How to build a polished UI with Tailwind CSS

How to add authentication and rate limiting

Prerequisites You'll Need

Before starting, make sure you have the following ready:

Node.js 18+ installed on your…