LoupePDF demo viewer

Paste a PDF URL above or drag-and-drop a file anywhere on this page to start inspecting.

LoupePDF supports full CMYK + spot inks with no approximation when a backend (Ghostscript / MuPDF + ICC profiles) is wired through the services prop — the densitometer, TAC heatmap, and color picker read true plate values straight from the host. The RGB-derived path is only used as the fallback when no backend data is supplied, which is the mode this demo runs in. Annotations live in this tab only and are discarded on reload. Max upload 50 MB.