Mozilla PDF.js Distribution

pdfjs-dist is the generic pre-built distribution of Mozilla's PDF.js library, a powerful HTML5-based Portable Document Format (PDF) library designed for parsing and rendering PDFs directly in web browsers. It aims to provide a general-purpose, web standards-based platform for PDF handling. The current stable version is 5.6.205 (as of April 2026), with frequent patch and minor releases, typically on a monthly or bi-monthly cadence, containing improvements for accessibility, performance, annotation editing, and viewer functionalities. Its key differentiators include being an official Mozilla project, its robust support for various PDF features (like annotations, forms, and accessibility), and its ability to operate entirely client-side, making it a popular choice for in-browser PDF display and manipulation without requiring server-side rendering capabilities.