Biomedical mechanism diagrams take hours of arranging cells, arrows and labels by hand. That is the gap PaperFig tries to close for biomedical researchers. It is an AI scientific figure generator built for researchers. Mechanism, workflow and graphical abstract figures are the core use. Built-in OCR pulls the labels out of the figure so you can review and fix the wording without redrawing anything. The example library covers biomedical, materials, energy, environmental, bioengineering, CS/AI and geoscience topics. It accepts text-to-figure, sketch-to-figure, photo-to-figure and reference-to-figure inputs, plus PDFs. The typical case is drawing signaling pathways and drug-delivery mechanisms. Manuscripts, grant proposals, posters and lab meetings are where it tends to get used. The free plan gives 150 signup credits plus 1 free figure per day for the first 7 days, and no card is needed. The output is a draft, so review labels and content before submission. Visit PaperFig.