Our barcodes download as .png files with transparent backgrounds. Some programs like your computer’s default photo viewer may open your file on a black background. Because the barcode is also black, it might look like you opened a blank image.
To view your barcode on a white background, try opening the file in another program such as Microsoft Paint or Microsoft’s Photo Viewer. Rest assured, it will upload correctly to Maestro Label Designer and other programs; just be sure to keep it off of a black background.