Abstract: A system for generating customized deliverable files based on variable data injection is provided. The system is configured to: receive a data retrieval request for image files stored in an image file database having an initial file format, the data retrieval request comprising construction specifications for a requesting entity device and a delivery endpoint; pull the image files from the image file database based on the data retrieval request; inject the image files and the construction specifications into a file construction engine configured to construct a merged file from the image files in a deliverable file format based on the construction specifications and the delivery endpoint; construct the merged file in the deliverable file format from the one or more image files based on the construction specifications and the delivery endpoint; and transport the merged file over a network to the delivery endpoint to complete the data retrieval request.