netex

mrdoob/netex is a minimal Android web browser with a built-in developer tools panel — a panel normally found in desktop browsers like Chrome that lets you inspect and debug web pages. The key feature is that you can drag up a bottom bar inside the app to reveal four tabs: a Console (where you can see live page logs and type JavaScript commands that run directly in the page), a Source viewer (showing the page's raw HTML, formatted for readability), a Network tab (logging network requests the page makes, with previews for images and 3D model files), and a Three.js tab (a specialized panel from the Three.js project for debugging 3D web applications).

The browser is distributed as an APK file — the standard Android app package format — which you sideload onto your device manually, since it is not listed on the Play Store. Sideloading means downloading the file and installing it directly, which requires enabling "install unknown apps" in your Android settings.

This tool is aimed at developers who build web experiences on Android and want a quick way to inspect, debug, or test their code directly on a real device without needing to connect to a desktop computer. Building from source requires the Android SDK and a compatible build environment.