GitHub EditorConfig is a Chrome add-on developed by Ingvar Stepanyan. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. This free extension provides EditorConfig support for GitHub.

The main purpose of GitHub EditorConfig is to look for .editorconfig files in the repository of the current file being viewed and apply the found settings to the code viewer and editor. It takes into account the branch being used.

In addition, GitHub EditorConfig allows users to set a default editorconfig that will be used for repositories without a custom one. By default, it fixes tab size to 4 spaces per tab for all files except Ruby, which uses 2 spaces per tab.