HexaPDF - A Versatile PDF Creation and Manipulation Library for Ruby

•    Ruby

---

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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PDF Library - PDF manipulation in .NET

•    VBNET

---

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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PDFBox - Java PDF library

•    Java

---

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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unipdf - Golang PDF library for creating and processing PDF files (pure go)

•    Go

---

UniDoc's UniPDF (formerly unidoc) is a PDF library for Go (golang) with capabilities for creating and reading, processing PDF files. The library is written and supported by FoxyUtils.com, where the library is used to power many of its services. Multiple examples are provided in our example repository https://github.com/unidoc/unidoc-examples as well as documented examples on our website.

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scissors - PDF manipulation in Node

•    Javascript

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PDF manipulation in Node.js, based on PDFTK! Split, join, crop, read, extract, boil, mash, stick them in a stew. Scissors is a wrapper around command line utilities (mainly PDFTK) that have to be separately installed.

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iTextSharp

•    CSharp

---

An open source C# PDF library

canvas - Cairo in Go: vector to raster, SVG, PDF, EPS, WASM, OpenGL, Gio, etc.

•    Go

---

Canvas is a common vector drawing target that can output SVG, PDF, EPS, raster images (PNG, JPG, GIF, ...), HTML Canvas through WASM, OpenGL, and Gio. It has a wide range of path manipulation functionality such as flattening, stroking and dashing implemented. Additionally, it has a text formatter and embeds and subsets fonts (TTF, OTF, WOFF, WOFF2, or EOT) or converts them to outlines. It can be considered a Cairo or node-canvas alternative in Go. See the example below in Figure 1 for an overview of the functionality. Figure 1: top-left you can see text being fitted into a box, justified using Donald Knuth's linea breaking algorithm to stretch the spaces between words to fill the whole width. You can observe a variety of styles and text decorations applied, as well as support for LTR/RTL mixing and complex scripts. In the bottom-right the word "stroke" is being stroked and drawn as a path. Top-right we see a LaTeX formula that has been converted to a path. Left of that we see an ellipse showcasing precise dashing, notably the length of e.g. the short dash is equal wherever it is on the curve. Note that the dashes themselves are elliptical arcs as well (thus exactly precise even if magnified greatly). To the right we see a closed polygon of four points being smoothed by cubic Béziers that are smooth along the whole path, and the blue line on the left shows a smoothed open path. On the bottom you can see a rotated rasterized image. The result is equivalent for all renderers (PNG, PDF, SVG, etc.).

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PDF Chain - Graphical user interface for the PDF Toolkit (PDFtk)

•    C++

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PDF Chain is a graphical user interface for the PDF Toolkit (pdftk). The GUI supports all common features of the command line tool in a comfortable way. PDF Chain generates a command for the PDF Toolkit from the GUI settings and executes it on the system. Therefore the PDF Toolkit must be already installed on the system.

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PDF Renderer - renders PDF documents to the screen

•    Java

---

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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iText - Java PDF library

•    Java

---

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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PDFSharp - Create and process PDF in .NET

•    CSharp

---

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

---

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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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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jPod intarsys PDF library

•    Java

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jPod is a rich PDF manipulation and rendering framework. A complete rendering library based on jPod is available here at quot;jPodRendererquot;. To see jPod amp; jPodRenderer at work, have a look at www.cabaret-solutions.com

SWFTools - Utilities to work with Adobe Flash files

•    C

---

SWFTools is a collection of utilities for working with Adobe Flash files (SWF files). The tool collection includes programs for reading SWF files, combining them, and creating them from other content (like images, sound files, videos or sourcecode).

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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.

pdf text-extraction pdf-library pdf-library-dotnet pdf-library-java

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.

combine_pdf - A Pure ruby library to merge PDF files, number pages and maybe more...

•    Ruby

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CombinePDF is a nifty model, written in pure Ruby, to parse PDF files and combine (merge) them with other PDF files, watermark them or stamp them (all using the PDF file format and pure Ruby code). I need help maintaining the CombinePDF Ruby gem.

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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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