HTML Viewer is a free utility and tool app developed by Subedi for Android devices. As its name suggests, it allows users to view local HTML files and websites. But what sets it apart is its ability to inject and test JavaScript on webpages.

With HTML Viewer, users can easily learn JavaScript by injecting it in pages. They can also save JavaScript in a file and open it whenever needed, without having to type it again. The app comes with a built-in file manager, allowing users to create new files, open them in their preferred text editor, enter JavaScript code, save it, and then load it in webpages using the app.

Another useful feature of HTML Viewer is the ability to create a folder of files containing JavaScript, which can be used to inject JavaScript in webpages created by the user or any other website. Overall, HTML Viewer is a convenient and practical tool for developers and anyone who wants to learn and test JavaScript on webpages.