What is Optimize PDF online — quality & DPI control?
TL;DR: Shrink44 PDF optimization re-rasterises pages at controlled DPI and quality so you can shrink documents for sharing without touching server uploads.
PDF optimization means restructuring or recompressing a PDF so it stores less data. Shrink44 takes a rasterising approach: PDF.js renders every page to a canvas, then jsPDF reassembles them at your target quality and DPI.
This is ideal when you need a shareable, lightweight version of an invoice, contract, brochure or scan for email or upload portals — even if you don't need text-editability.