Open Source Java PDF Generation Libraries for Windows

iText is an open-source PDF library available for Java and .NET (C#). iText allows you to effortlessly generate and manipulate standards-compliant PDF documents with a powerful and feature-rich SDK. With iText, you can create archivable and accessible PDFs, split and merge documents, fill and flatten forms, digitally sign documents, and more. iText add-ons enable additional functionality, such as PDF creation from HTML templates, secure redaction, OCR, and much more. The latest versions of iText build on the success of previous versions and feature an improved document engine, high and low-level programming capabilities, and a more efficient modular structure. iText represents the next level for developers looking to leverage PDF in document workflows. The main project page for iText is now on GitHub, and all the latest releases, code samples, open source add-ons and tools, etc. can be found at https://github.com/itext/.

ConcatPDF is the tool to concatenate PDF files. It can concatenate, extract, encrypt, decrypt, configure PDF files, convert image files to PDF. GUI version and CUI version are both available. iText.NET is iText porting on .NET Framework by J#. This library allows you to generate PDF, (X)HTML, XML, RTF files on Microsoft.NET Framework including ASP.NET.

This is a Java port of the original FPDF free PDF generation library for PHP.

The Nheengatu Project is a Java library that provides HTML markup abstraction allowing you to reutilize it to generate PDF files, OpenOffice documents, image files, etc. The goal of this project is to maximize the use of HTML markup procedures.

Copperhead is a small and simple library providing a Swing user interface that allows one to automatically generate PDF documents from annotated objects using the iText PDF library. Copperhead is developed under GPLv3. Please download Copperhead 0.1b for iText 2 and 0.2b for iText5. Read more on http://byteality.ch/blog. Enjoy!

A simple online service for PDF conversion. This project is a simple library and also a web application. It offers a REST service and a simple upload service for synchronous conversion. This library/application doesn't contain conversion libraries because it's a wrapper for existing tools. toPDF currently supports the open source tool PDF Creator (http://www.pdfforge.org) and the commercial solution, easy PDF, from BCL (http://www.pdfonline.com/easypdf/sdk/).