RTL toggle is a free Chrome add-on developed by aris.magrin. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. This handy tool detects and toggles the language direction ('rtl'/'ltr') of a website, making it easier for developers to visualize and control language direction independently from the actual language being used.

The functionality of RTL toggle can be divided into two parts: detection and toggling. When a new tab is loaded, the add-on's script checks the 'dir' attribute of the tag element. If the attribute is set to 'rtl', the add-on's badge text is also set to "RTL", indicating that the current website uses a language that is written from right to left.

The toggling feature allows users to manually switch the language direction by clicking on the add-on's icon. When clicked, a script toggles the value of the 'dir' attribute of the tag between 'rtl' and 'ltr', or adds the attribute if it is not set.

RTL toggle is a useful tool for developers working on websites and applications that support right-to-left languages. It provides an easy way to visualize and control language direction within the browser, enhancing the development process.