Shader Graph GitHub previewer is a Chrome add-on that enhances your GitHub browsing experience. This tool adds a convenient preview button to the right side of the GitHub file toolbar specifically for '.shadergraph' or '.shadersubgraph' files. With this feature, users can preview these files without the need to open Unity, streamlining the workflow for developers and enthusiasts alike.

The add-on is not affiliated with GitHub or Unity, offering an independent solution for improved file preview functionality. For those interested in the inner workings of the add-on or looking to contribute, the source code is open and available for exploration and potential enhancements on GitLab.