PDFium

PDFium is an open-source PDF rendering engine originally developed by Google and used in Chromium-based software. It is primarily a C++ library for viewing, rasterizing, and processing PDF content rather than a full end-user desktop application.

Developers embed PDFium in browsers, document viewers, mobile apps, and server-side workflows that need reliable PDF rendering. It supports parsing PDFs, rendering pages to bitmaps, text extraction, form handling, and basic editing APIs. A distinguishing trait is its widespread use as the PDF engine behind Chrome and other Chromium-derived projects.