pdf-reader - The PDF::Reader library implements a PDF parser conforming as much as possible to the PDF specification from Adobe

•    Ruby

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The PDF::Reader library implements a PDF parser conforming as much as possible to the PDF specification from Adobe. It provides programmatic access to the contents of a PDF file with a high degree of flexibility.

pdfkit - A JavaScript PDF generation library for Node and the browser

•    CoffeeScript

---

A JavaScript PDF generation library for Node and the browser. PDFKit is a PDF document generation library for Node and the browser that makes creating complex, multi-page, printable documents easy. It's written in CoffeeScript, but you can choose to use the API in plain 'ol JavaScript if you like. The API embraces chainability, and includes both low level functions as well as abstractions for higher level functionality. The PDFKit API is designed to be simple, so generating complex documents is often as simple as a few function calls.

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PDFBox - Java PDF library

•    Java

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Apache PDFBox is an open source Java PDF library for working with PDF documents. This library allows creation of new PDF documents, manipulation of existing documents and the ability to extract content from documents. It provides support for adding bookmarks, fonts, text extraction, Encryption, PDF printing and lot more.

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Buka - EBook Management

•    Javascript

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Buka is a modern software that helps you manage your ebook at ease. With a simple, clean and straight-forward user interface, Buka aims to gather your ebooks for a reading experience without hassles. Buka currently support .PDF format with configurations that helps user focus more on the content. Of course you can always open .deb package with a package manager like Synaptic, Gnome Software or Gdebi then start the app instead of using command line options.

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OrsonPDF - A fast, lightweight PDF generator for the Java platform

•    Java

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OrsonPDF is a PDF generation library for the Java(tm) platform that allows you to create content in PDF format using the standard Java2D drawing API (Graphics2D). OrsonPDF is light-weight, fast, and has no dependencies other than the Java runtime (1.6 or later).

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Poppler - PDF rendering library

•    Linux

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Poppler is a PDF rendering library based on the xpdf-3.0 code base.

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HexaPDF - A Versatile PDF Creation and Manipulation Library for Ruby

•    Ruby

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HexaPDF is a pure Ruby library with an accompanying application for working with PDF files. It supports Creating new PDF files, Manipulating existing PDF files, Merging multiple PDF files into one, Extracting meta information, text, images and files from PDF files, Securing PDF files by encrypting them and optimizing PDF files for smaller file size or other criteria.

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iText - Java PDF library

•    Java

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iText is one of the popular and widely used PDF library. It is used to generate PDF documents dynamically. Mostly web developers will love it to generate PDF documents and reports based on data from an XML file or a database and serves it to the browser. It has support of adding bookmarks, watermarks, Encryption, Form filling and lot more.

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PDF Library - PDF manipulation in .NET

•    VBNET

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A library for PDF manipulation implementing Adobe PDF standard version 1.7. This library allows to read PDF files and apply changes to them, it is written in .NET 2.0 using Visual Studio 2005. Writing and Parsing PDF is supported.

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PDFSharp - Create and process PDF in .NET

•    CSharp

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PDFsharp is the Open Source .NET library that easily creates and processes PDF documents on the fly from any .NET language. The same drawing routines can be used to create PDF documents, draw on the screen, or send output to any printer. Neither Adobe's PDF Library nor Acrobat are required.

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pdf-bot - 🤖 A Node queue API for generating PDFs using headless Chrome

•    Javascript

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Easily create a microservice for generating PDFs using headless Chrome. pdf-bot is installed on a server and will receive URLs to turn into PDFs through its API or CLI. pdf-bot will manage a queue of PDF jobs. Once a PDF job has run it will notify you using a webhook so you can fetch the API. pdf-bot supports storing PDFs on S3 out of the box. Failed PDF generations and Webhook pings will be retried after a configurable decaying schedule.

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MuPDF - A Lightweight PDF, XPS and E-book viewer

•    C

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MuPDF is a lightweight PDF, XPS, and E-book viewer. It renders text with metrics and spacing accurate to within fractions of a pixel for the highest fidelity in reproducing the look of a printed page on screen. It supports PDF 1.7 with transparency, encryption, hyperlinks, annotations, searching and more. The viewer is small, fast, yet complete. It supports many document formats, such as PDF, XPS, OpenXPS, CBZ, EPUB, and FictionBook 2. You can annotate PDF documents and fill out forms with the mobile viewers (this feature is coming soon to the desktop viewer as well).

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PDF Renderer - renders PDF documents to the screen

•    Java

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PDF Renderer is a Java library which renders PDF documents to the screen using Java2D in to swing panel. It is capable to view the PDF, Converts it to PNG, View PDF in to 3D scene, Print preview support. It does not support to create or manipulate the PDF.

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PDFEdit

•    C++

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PDFedit is a free open source pdf editor and a library for manipulating PDF documents. It includes PDF manipulating library based on xpdf, GUI, set of command line tools and a pdf editor. You can use it to read, change and extract information from a PDF file. It is based on xpdf library.

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html-pdf-chrome - HTML to PDF converter via Chrome/Chromium

•    TypeScript

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HTML to PDF converter via Chrome/Chromium. Note: It is strongly recommended that you keep Chrome running side-by-side with Node.js. There is significant overhead starting up Chrome for each PDF generation which can be easily avoided.

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PDFGenerator - A simple generator of PDF written in Swift.

•    Swift

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PDFGenerator is a simple PDF generator that generates with UIView, UIImage, ...etc . Also PDF can generate from image(s), image path(s) same as example.

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PDFClown - PDF library

•    Java

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PDFClown is a PDF library helps to generate, read and edit PDF. It helps to split and merge the PDF documents. It has support to add Images, Fonts, Barcodes, Bookmarks, Annotations, Form fields like checkbox, button, list box etc, Compression, text extraction.

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PDF.js - PDF Reader in JavaScript

•    Javascript

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PDF.js is a Portable Document Format (PDF) viewer that is built with HTML5. PDF.js is community-driven and supported by Mozilla Labs. Our goal is to create a general-purpose, web standards-based platform for parsing and rendering PDFs.

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zotfile - Zotero plugin to manage your attachments: automatically rename, move, and attach PDFs (or other files) to Zotero items, sync PDFs from your Zotero library to your (mobile) PDF reader (e

•    Java

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Zotfile is a Zotero plugin to manage your attachments: automatically rename, move, and attach PDFs (or other files) to Zotero items, sync PDFs from your Zotero library to your (mobile) PDF reader (e.g. an iPad, Android tablet, etc.) and extract annotations from PDF files. Detailed information are available from the zotfile website.

Reader - PDF Reader Core for iOS

•    Objective-C

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This project is now deprecated - it will no longer be maintained and will only be kept around for historical reasons. Please see the UXReader PDF Framework for iOS project for its replacement. I've crafted this open source PDF reader code for fellow iOS developers struggling with wrangling PDF files onto iOS device screens.