In this article, we will explore the topic of PDF.js in depth, addressing its origins, development, and relevance today. Since its emergence, PDF.js has captured the interest of academics, specialists and the general public, sparking debates, reflections and advances in various fields. Over the years, PDF.js has proven to be a topic of great importance, both for its impact on society and for its influence on different areas of knowledge. Through this comprehensive analysis, we will seek to understand the significance of PDF.js and its role in a constantly changing world.
PDF viewer in JavaScript included in Mozilla Firefox
PDF.js
PDF.js in Firefox 100, with a table of contents displayed on the sidebar
PDF.js was originally created as an extension for Firefox[4] and is included in Firefox since 2012 (version 15),[5][6] and enabled by default since 2013 (version 19).[7][8] It was added to Firefox for Android in 2023 (version 111).[9]
The project was created to provide a way for viewing PDF documents natively in the web browser, which prevents potential security risks when opening PDF documents outside a browser, as the code for displaying the document is sandboxed in a browser.[10] Its implementation uses the Canvas element from HTML5, which allows for fast rendering speeds.[10]
It can be integrated or embedded in a web or native application to enable PDF rendering and viewing, and allows advanced usages such as Server-side rendering.
According to a benchmark by Mozilla, PDF.js is performant for viewing most common PDF files, while it may have some issues with large or 'graphics-heavy' documents.[22]
PDF.js supports most of the PDF specifications (including form support or XFA[23]), but some features have not been implemented yet, which may impact rendering behavior depending on the features the document uses.[24]
Several PDF/X or optional PDF features that are not supported in PDF.js include:
The PDF.js contributor community also notes that the browser behavior of PDF.js varies with browser support for PDF.js's required features.[28] Performance and reliability will be the best on Chrome and Firefox, which are fully supported and subject to automated testing.