Browse free open source Libraries and projects for Windows below. Use the toggles on the left to filter open source Libraries by OS, license, language, programming language, and project status.

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  • 1
    PDF Arranger

    PDF Arranger

    Small python-gtk application, to merge or split PDFs

    PDF Arranger is a small python-gtk application, which helps the user to merge or split PDF documents and rotate, crop and rearrange their pages using an interactive and intuitive graphical interface. It is a front end for pikepdf. PDF Arranger is a fork of Konstantinos Poulios’s PDF Shuffler (see Savannah or Sourceforge). It’s a humble attempt to make the project a bit more active.
    Downloads: 308 This Week
    Last Update:
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  • 2
    Dompdf

    Dompdf

    HTML to PDF converter for PHP

    dompdf is an HTML to PDF converter. At its heart, dompdf is (mostly) a CSS 2.1 compliant HTML layout and rendering engine written in PHP. It is a style-driven renderer, it will download and read external stylesheets, inline style tags, and the style attributes of individual HTML elements. It also supports most presentational HTML attributes. PDF rendering is currently provided either by PDFLib or by a bundled version the R&OS CPDF class written by Wayne Munro. (Some important changes have been made to the R&OS class, however). In order to use PDFLib with dompdf, the PDFLib PECL extension is required. Using PDFLib improves performance and reduces the memory requirements of dompdf somewhat, while the R&OS CPDF class, though slightly slower, eliminates any dependencies on external PDF libraries.
    Downloads: 186 This Week
    Last Update:
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  • 3
    Vanilla.PDF

    Vanilla.PDF

    Cross-platform SDK for creating and modifying PDF documents

    Vanilla.PDF is a modern, high-performance, open-source C++17 SDK designed for creating, editing, signing, and analyzing PDF documents across multiple platforms. It requires no external runtime dependencies, making it lightweight and ideal for embedding into desktop applications, servers, or automation pipelines. The SDK offers full cross-platform support including Windows, Linux, macOS, and Android, with builds available for major compilers and architectures. Vanilla.PDF supports advanced PDF features such as adding CMS (PKCS#7) digital signatures, modifying content streams and metadata, and working with encryption and permissions based on standard PDF security models. It includes tools for parsing PDF internals like cross-reference tables and objects, providing fine-grained document analysis capabilities. The project is unit-tested with continuous integration pipelines, supporting sanitizers for enhanced code quality and stability.
    Downloads: 12 This Week
    Last Update:
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  • 4
    QuestPDF

    QuestPDF

    A library that can help you with generating PDF documents

    Quickly design and generate PDF documents with an open-source, modern, and battle-tested C# library. Forget about limitations, feel confident, enjoy your task and efficiently deliver professional products. QuestPDF is a progressive library that can help you with generating PDF documents in your .NET application by offering a friendly, discoverable and predictable C# fluent API. Do you believe that creating a complete invoice document can take less than 200 lines of code? We have prepared for you a step-by-step instruction that shows every detail of this implementation and describes the best patterns and practices. This library is created specifically for designing and arranging document layouts, with full paging support. Alternative solutions, such as HTML-based converters, are not designed for this purpose and therefore are often unpredictable and do not produce desired results.
    Downloads: 6 This Week
    Last Update:
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  • 5
    borb

    borb

    borb is a library for reading, creating and manipulating PDF files

    borb is a library for creating and manipulating PDF files in python. borb is a pure python library to read, write, and manipulate PDF documents. It represents a PDF document as a JSON-like data structure of nested lists, dictionaries and primitives (numbers, string, booleans, etc) This is currently a one-man project, so the focus will always be to support those use-cases that are more common in favor of those that are rare.
    Downloads: 6 This Week
    Last Update:
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  • 6
    Asciidoctor PDF

    Asciidoctor PDF

    Asciidoctor PDF: A native PDF converter for AsciiDoc

    A fast text processor & publishing toolchain for converting AsciiDoc to HTML5, DocBook & more. Asciidoctor is a fast, open source, Ruby-based text processor for parsing AsciiDoc® into a document model and converting it to output formats such as HTML 5, DocBook 5, manual pages, PDF, EPUB 3, and other formats. Asciidoctor also has an ecosystem of extensions, converters, build plugins, and tools to help you author and publish content written in AsciiDoc.
    Downloads: 5 This Week
    Last Update:
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  • 7
    dompdf - the PHP 5 HTML to PDF converter. dompdf is a (mostly) CSS compliant HTML rendering engine written in PHP. It supports external stylesheets, inline style tags, and the style attributes of individual HTML elements. Requires PHP 5.
    Downloads: 9 This Week
    Last Update:
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  • 8

    toPDF

    Online service for PDF conversion (to PDF)

    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/).
    Downloads: 6 This Week
    Last Update:
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  • 9
    ASP.NET PDF Viewer by GroupDocs

    ASP.NET PDF Viewer by GroupDocs

    Secure, Browser-Agnostic ASP.NET PDF Viewer with DRM Features

    This sample project is created by the GroupDocs showcase team to demonstrate key benefits of an ASP.NET PDF viewer built using the commercial library – GroupDocs.Viewer for .NET. The viewer allows you to display PDF documents across all standard web-browsers (IE8+, Chrome, Mozilla Firefox, Safari 5+, Opera, etc.) without having to install any software or plugins on end-user machines. Another core feature – is the ability to display PDFs in a read-only mode, so that end users can’t download, print or copy original PDF files while viewing them in a browser. Please note that GroupDocs.Viewer for .NET is a paid library. In order to setup and run this project, you will need to download the GroupDocs.Viewer for .NET library from the GroupDocs website. For more details on the sample ASP.NET PDF viewer and to download the library, please read this article: > http://groupdocs.com/blog/asp-net-pdf-viewer-built-based-on-the-groupdocs-viewer-for-net-library
    Downloads: 2 This Week
    Last Update:
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  • 10
    PDF API HTML5 Web Apps

    PDF API HTML5 Web Apps

    Mini SDK JavaScript API library PDF web apps

    A condensed library designed to web modern applications, to quickly export your content html to pdf thanks the famous library in javascript: jsPDF. And a special thanks to the project canvg and html2canvas. Project documentation: http://ulmdevice.altervista.org/pdfapihtml5/#documentation ========== Also available service for Angular 7+: http://ulmdevice.altervista.org/pdfjsapi/ Mobile Applications: http://bit.ly/1MrlgKk Opera add-on: http://bit.ly/1kkMhTa
    Downloads: 1 This Week
    Last Update:
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  • 11
    Free HTML to PDF for .NET and C# Library

    Free HTML to PDF for .NET and C# Library

    Free HTML to PDF Converter for C# .NET and ASP.NET MVC

    HiQPdf Library for C# .NET offers you a modern, simple, fast, flexible and powerful tool to create complex and stylish PDF documents in your applications with just a few lines of code. Using the high quality HTML to PDF conversion engine you can easily design a document in HTML with CSS3, JavaScript, SVG or Canvas and then convert it to PDF preserving the exact content and style.
    Downloads: 0 This Week
    Last Update:
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  • 12
    JPDF Export
    JPDF Export is a java library built on the famous iText library. It provides simple functions that can be used to build complex pdf files. It also provides simple classes to merge, split and convert pdf files
    Downloads: 0 This Week
    Last Update:
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  • 13
    Markdown to PDF

    Markdown to PDF

    Hackable CLI tool for converting Markdown files to PDF using Node.js

    A simple and hackable CLI tool for converting markdown to pdf. It uses Marked to convert markdown to HTML and Puppeteer (headless Chromium) to further convert the HTML to PDF. It also uses highlight.js for code highlighting. The whole source code of this tool is only ~250 lines of JS ~500 lines of Typescript and ~100 lines of CSS, so it is easy to clone and customize.
    Downloads: 0 This Week
    Last Update:
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  • 14
    Vertopal PHP

    Vertopal PHP

    PHP library for Vertopal file conversion API

    Vertopal PHP is a PHP library for easy access to Vertopal file conversion API. Using Vertopal PHP, you can get started quickly and easily implement the support of converting +350 file formats into your project.
    Downloads: 0 This Week
    Last Update:
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  • 15
    JPDF Tools
    JPDF Tools is a GUI java program built on the JPDF Export library. Its main aim is to create pdf files by inserting texts, images or tables. Users can also merge PDF files, split PDF files, merge images into PDF files and soon convert from and to PDF files.
    Downloads: 3 This Week
    Last Update:
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