Fill in the Copyright Office's titles list, name it right and zip JPEG, GIF or TIFF files under 500 MB. Runs in your browser. You file in eCO yourself.
Add your photos in the browser. It fills in the Office's own titles list template, names the file with your group title and case number the way the Office's help page shows, and builds zips of JPEG, GIF or TIFF files under the 500 MB upload limit. It checks the 750 photo limit, keeps published photos to one calendar year per claim, and builds the Photograph Titles entries under 1,995 characters.
Your photos are never uploaded to us. Everything runs on your computer.