SPush SP editor is a developer tools extension for Chrome that allows users to automatically save script and CSS files to SharePoint. It provides a quick and efficient way to change and test content files of SharePoint Apps without the need to deploy scripts using Visual Studio or create new app packages.

One of the key features of SPush SP editor is the ability to force script or CSS files to be rewritten with just a simple Ctrl+S command. This ensures that any changes made to the files are saved and applied immediately. Additionally, the extension allows users to modify SharePoint 2013 App content directly from the host web, making it convenient for developers to make changes without navigating through multiple interfaces.

Another useful feature of SPush SP editor is its ability to automatically check-out script and CSS documents if the "Require documents to be checked out before they can be edited" option is enabled. This ensures that only authorized users can make changes to the files, enhancing security and control.

The extension also offers a quick creation feature for sample script and CSS files by executing the SPush(typeOrUrl) command in the console. This allows developers to easily generate sample files for testing and experimentation.

Overall, SPush SP editor is a valuable tool for SharePoint developers, providing a seamless way to edit and save script and CSS files directly to SharePoint. It is compatible with SharePoint 2010+ (on-prem and O365 SharePoint Online), making it suitable for a wide range of SharePoint environments.