Opening a new GitHub repository can be overwhelming. Hundreds of files, unfamiliar folder structures, and zero documentation. But with the right approach — and the right tools — you can understand any codebase in minutes.
Always start with the README. It usually tells you what the project does, how to install it, and how to run it. If there's no README, that's already a red flag about code quality.
The top-level folders reveal the architecture. A `src/` folder with `components/`, `pages/`, and `api/` tells you it's a full-stack web app. A `lib/` folder tells you it's a library.
Dependencies reveal the tech stack instantly. See `react` and `next`? It's a Next.js app. See `express` and `mongoose`? It's a Node + MongoDB backend.
This is where RepoExplainer shines. Paste the URL and get an instant summary of what the repo does, its tech stack, how to run it, and the key files — all in seconds. No more guessing.
Understanding a codebase quickly is a skill. With practice and the right tools, you can become proficient at reading any project. Try RepoExplainer on a repo you've been curious about — you might be surprised how much you learn.