I built the first version of this Next.js extension a few years ago to explore the Next.js data model, and I’ve been evolving it ever since to support both App and Pages Router structures.
I’m sharing this as a completely altruistic project for anyone who might find it useful; it may still have some bugs, so I’d love to get your constructive feedback.
Anyone who wants to participate or contribute is more than welcome!
Links:
<ul>
<li><a href="https://chromewebstore.google.com/detail/nextjs-explorer-nextjs-ap/iiekmbomdcmddchlplbdlkkpdgncgpdg" target="_blank" rel="noopener nofollow">Next.js Explorer on Chrome Web Store</a></li>
<li><a href="https://addons.mozilla.org/en-US/firefox/addon/nextjs" target="_blank" rel="noopener nofollow">Next.js Explorer on Firefox Add-ons</a></li>
</ul>

An independent Squad for discussions, questions and answers about Next.JS. 


NextJS

A browser extension for Chrome and Firefox that visualizes the Next.js data model for both App Router and Pages Router structures. Built as an open, community-driven tool, it helps developers explore and understand their Next.js application architecture. The author is seeking feedback and contributions.

Next.js Explorer: A tool to visualize App & Pages Router data models