Every print-on-demand platform hands you the same thing: a flat PNG "template" with red and blue boxes on it, and instructions to build your wraparound cover around it by hand. Get the spine width wrong, or the page count changes, and you're redoing it from scratch. Spinework does the geometry for you — live, as you type.
5×8, 6×9 and the rest of the standard sizes, or enter your own custom dimensions.
Calculated from page count and paper stock — white, cream, or colour — with a manual override if your printer's numbers differ.
Upload your front cover and it fits into place automatically — "fill panel" for edge-to-edge art, or "fit inside guides" so nothing gets cropped.
An editable blurb that wraps and repositions itself automatically around an optional author photo.
Kept clear by construction, sized to the standard ISBN barcode and adjustable if your printer's spec differs.
Industry-standard red/blue convention, with a proof export (guides visible) and a clean print-file export.
Spinework is a single file — no server, no account, no watching a progress bar. Upload your cover art, and it stays on your machine the whole time. Set your trim size and Spinework shows you the exact source-image dimensions immediately, so you know precisely what size to design or generate your cover art at for a perfect fit — no cropping, no letterboxing. Download it once and it works offline, forever.
I built it for the same reason I built The Bindery — because the tool I needed for my own paperbacks didn't exist yet.
