Best PDF APIs for Windows of 2025

Pdftools can help you process thousands of documents, or even millions. The suite of SDKs from Pdftools is designed for industries that are document-intensive. They will make your document workflows faster, easier, and less stressful. The Pdftools products are built on SDKs or APIs. They integrate seamlessly with your existing systems and applications. Process thousands of documents per minute. Our tools are designed to be fast and efficient. We are engineers at heart and only accept the most reliable, usable and well documented platforms. File sizes can be reduced, but quality and interactivity are not compromised. Your documents will be compliant with long-term archiving. We have documented every detail of our products so that you can easily get started.

Install-free PDF editing, form filling, redaction, signing, viewing, and more on your website with RAD PDF! Packaged as an easy to use library / WebControl (compatible with .NET 3.5+, .NET Core, and .NET 5+), RAD PDF can be used with just about any flavor of ASP.NET including MVC, Razor, Blazor, WebForms, and more. RAD PDF is compatible with 99% of internet browsers, including those on Linux, Mac OS X, Microsoft Windows, and mobile. No plugins. No Adobe Reader. RAD PDF is more than a PDF to HTML converter. It natively supports all the most common PDF features including annotations, bookmarks, form fields, page labels, and more. With advanced PDF options, RAD PDF allows you to selectively enable and disable features not available with Adobe Acrobat Reader, like protecting a PDF from being downloaded while still viewable online. RAD PDF users can use PDF form fields directly from the web browser by enabling PDF form filling and PDF form saving without having to install any software. Integrating directly with ASP.NET, RAD PDF allows your web application to capture input data, build custom workflows, and provide an intuitive graphical user interface (GUI) for just about any online PDF interaction imaginable!

Nutrient provides an extensive solution for all your PDF requirements, delivering tools that seamlessly operate PDF features across any platform. 1. SDK: Incorporate advanced PDF functionality into iOS, Android, Windows, web, or any cross-platform technology, supplying abilities like PDF viewing, annotation, collaboration, and beyond. 2. Libraries: Employ our powerful .NET and Java libraries to enhance your backend applications with batch processing of redactions and PDF forms, OCR'd scanned text, and PDF document editing, all directly from your application server. 3. Processor: Our agile PDF microservice, Processor, enables rapid generation of PDFs from HTML, including HTML forms, as well as Office-to-PDF conversions, OCR, redaction, and XFDF combining and exporting. 4. PDF API: Take advantage of our hosted PDF API to generate, convert, and alter PDF documents in your workflows. We handle the development and server management, freeing you up to concentrate on your business. At Nutrient, we're not just a tool; we're a committed ally in your success. Gain direct contact with our engineers for expert guidance, utilize comprehensive examples to simplify integration, and make the most of our top-tier documentation.

PrizmDoc helps web developers embed secure secure and responsive HTML5 document viewing, document editing, and native spreadsheet viewing and editing within your own web application or system solution. Due to its extreme flexibility, PrizmDoc can be supported on virtually any platform, and in any programming language that supports REST API calls. Key features can be easily turned on or off depending on your application’s needs, along with user-based permissions to protect proprietary logic, and you can customize the UI layout or style. PrizmDoc can be self-hosted on your own infrastructure or accessed through a fully managed backend on Accusoft’s public or private cloud. And with best-in-class support, Accusoft’s Enablement Services to ensure a seamless PrizmDoc implementation.

KDAN PDF Reader is your all-in-one PDF solution. Edit, sign, OCR scan, convert, annotate, and fill forms in PDF documents. With innovative AI features, speed up your document workflow! Designed for Mac, iPhone, and iPad, KDAN PDF Reader is trusted by millions for its comprehensive features and efficiency. KEY FEATURES EDIT TEXT & PDF • Fix errors and typos directly in PDF - replace, add, or delete text in PDFs • Add, edit, crop, and adjust images in PDFs • Add header & footer • Add Bates numbering for easy reference, tracking, and organization • Use stamps or dynamic stamps to indicate status, provide feedback, and highlight information in a document CONVERT PDF • Offline file converter - convert file without an internet connection • Convert PDF to Office file formats, image, or ePub • Format supported- docx, xlsx, csv, pptx, rtf, txt, html, jpg, png, BMP, jpg200, pub, MOBI SIGN & FORMS • Fill & edit forms • Create fillable forms with buttons, checkboxes, and list boxes • Create signature and sign on PDF • Create signatures using trackpad, keyboard, or images EDIT PAGE • Merge & split PDFs • Extract, rearrange, rotate, delete, and crop PDF pages • Change PDF background color • Append pages from

PDF Automation Server – PDF Processing Server PDF Automation Server provides a wide range of PDF processing functions to suit different environments. PAS is an essential tool for streamlining your PDF processing, document workflows, and web service orchestration. REST API Module Use RESTAPI calls to integrate into your existing workflows HTML5 PDF Module Convert and serve PDF files directly in your browser Workflow Module Robust, RESTAPI PDF Automation Server provides a complete suite of PDF processing and conversion capabilities in a robust RESTserver environment. It can integrate into existing document workflows and integrate with third-party integration and orchestration tools. HTML PDF Markup Module PDF Automation Server allows you to markup PDF documents in your browser.

Add robust PDF features to your apps with the easy-to-integrate MuPDF SDK/ The small yet fast viewer supports a number of document formats including PDF, XPS, OpenXPS, CBZ, and ePUB. The renderer is designed for high-fidelity anti-aliased graphics and renders text with metrics and spacing accurate to within fractions of a pixel. The PDF library includes interactive features such as annotations, form filling, digital signatures, redactions, and search. The command-line tools provide users myriad customization options for rendering and converting documents, and manipulating PDF files. MuPDF supports document conversion to other formats including HTML, SVG, and CBZ. In addition to the C library, there's a Java library using JNI that works for both Oracle's Java and Android. In addition to the Java API, C++ and Python bindings have been developed. MuPDF supports most of the major coding environments and operating systems. It is highly flexible and optimized for each unique platform. MuPDF API has been used as the PDF engine in a variety of deployments ranging from Android and iOS mobile applications, SaaS and cloud solutions, document management programs, and embedded products, to name a few.

ComPDFKit offers a top-quality PDF SDK, PDF API, and PDF Server for companies, organizations, small businesses, and developers. It enables you to integrate PDF document annotation, editor, conversion, form filling, and signing into your applications or products, saving you time and expenses. ComPDFKit is compatible with Windows, Web, Android, iOS, Mac, Linux, and other cross-platform frameworks such as React Native, Flutter, and Electron with just a few lines of code. ComPDFKit Updates: 1. ComPDFKit API Sign up and Get 1000 Free Files Processing Monthly. Allow you to edit & convert PDF files, split/merge/insert/rotate/delete/extract PDF pages, and process PDFs with OCR. 2. Free Online Tools Work with PDF in ComPDFKit online PDF tools to convert PDF files to/from docx, xlsx, pptx, png, jpg, html, txt, csv, rtf files, etc. 3. Web Demo View, Edit, Annotate, Compare, Sign, Encrypt, Decrypt, watermark PDF files, and Create/fill out PDF forms online for free. 4. Community License Start-ups and Individual developers can get affordable prices from ComPDFKit. We help you to build your customized applications with a special price and discount.

Fast and efficient Document APIs for.NET Standard2.0 and Java Get total document control with ultrafast, low-footprint document APIs designed for enterprise apps. Create, load, edit, and save spreadsheets, images, PDF, and DOCX files. Quickly create large spreadsheets, Word, images, PDF documents, and large spreadsheets. Excel, Word, and Acrobat are independent. Run on Windows, Mac and Linux. Deploy to Azure or AWS Lambda. What’s New in GrapeCity Documents v5: - Full support for .NET 6 - SVG support for GrapeCity Documents for PDF and Imaging - Print PDF documents on Windows with GrapeCity Documents for PDF - UI enhancements for GrapeCity Documents for PDF Viewer - And much more!

Add PDF Features with 2 API calls Open, Edit, View PDF. Two API calls and a configuration file are all you need. In less than a day, your app can import, view, edit, and open PDF features. The SDK can be used to neutralize differences between formats. This includes cropping, fills, color management, and fonts. The PDF Conversion SDK can convert all PDF versions, including ISO Standard PDF 2.0. Any PDF file or print-ready memory can be used as input. Conversions are seamless without any intermediate steps or compromises in quality. No printer driver. The PDF Conversion SDK works on Windows, MacOS, and Linux. It supports.NET. Included is an example code. Removes redundant information & compresses data. This provides great performance for web and application browsing.

The PDF Viewer SDK is a powerful visual component designed for building custom PDF readers in .NET desktop applications. This control allows users to view PDF files offline, eliminating the need for an Internet connection, and includes features such as zooming in and out, navigating between pages, copying text to the clipboard, conducting text searches, and enabling a night mode that changes the background to black while inverting the text color for easier reading. Our tools incorporate advanced technologies that enhance performance, ensuring that users have a seamless experience. Additionally, we provide a wide array of source code examples and extensive documentation to facilitate a quick start with our products. We continually update our SDKs, APIs, and free applications to improve functionality and user experience. Furthermore, our dedicated team is available to address any bugs or issues that may arise, reinforcing our commitment to customer satisfaction. Overall, we strive to ensure that developers can easily integrate and utilize our tools in their projects.

JPedal makes it easy to work with PDF files in Java. All common tasks can be solved by simply adding a few lines code to your application. IDRsolutions has been actively developing the software for more than 20 years. It can work with any problem PDF files. JPedal supports all PDF 2.0 file specifications, including Encyption and Blending, Forms and Annotations, PostScript and OpenType fonts. JPedal comes with lots of sample code and APIs that can be easily integrated into your code. Adding a feature to your code requires only 2-3 lines of code. JPedal uses its own font engine and custom images libraries to produce high quality images and provide maximum Java performance. JPedal is actively being developed with nightly builds as well as monthly releases. The same people who code the code also provide support.

Generate and manage PDF files with ease by utilizing features such as splitting, appending, stamping, encrypting, extracting, and filling. PDFKit.NET is a fully managed .NET class library designed for the creation and manipulation of PDF documents, packaged as a single assembly that allows for straightforward xcopy deployment. It operates independently with no additional requirements beyond the .NET framework itself. At the heart of PDFKit.NET lies a coherent and user-friendly object model comprising various classes like document, page collection, page, canvas, shape, bookmark, annotation, and field. The development team's primary goal is to simplify the integration of this class library into larger applications. With PDFKit.NET 5.0, users can fill in text fields, checkboxes, and radio buttons, while also having the option to save the forms in either an editable state or as a flattened PDF. Additionally, this version introduces the ability to handle dynamic XFA documents through the new XFA processor API, enhancing functionality. Furthermore, PDFKit 5.0 enables users to extract all graphics from a page, compiling them into a collection of various shapes, which can include text, images, and curves, providing versatile options for document manipulation. This makes PDFKit.NET an invaluable tool for developers looking to incorporate robust PDF handling capabilities into their applications.

Gain comprehensive management of your documents through rapid, lightweight APIs tailored for enterprise applications. Effortlessly create, load, modify, save, and handle XLSX spreadsheets, PDFs, images, and DOCX files using programming languages like C# .NET, VB.NET, or Java. Experience seamless viewing, editing, printing, form-filling, and submission of documents with the JavaScript PDF Viewer and PDF Editor. These solutions are compatible with Windows, macOS, and Linux operating systems, eliminating any reliance on Excel, Word, or Acrobat. You can deploy these tools across various cloud services, including Azure and AWS, as well as AWS Lambda. The products are offered individually or as part of a comprehensive bundle. Specifically, the .NET 6 Document API is engineered to produce large, efficient documents quickly while maintaining a lightweight and adaptable structure, thus providing you with enhanced flexibility and creativity in application development. With a unified code base, you can develop for any .NET platform or major operating system, including .NET, C#, VB.NET .NET Framework, Mono, Xamarin.iOS, and Xamarin.Android, ensuring a versatile development experience. Moreover, the API's efficiency allows developers to optimize their workflows and achieve better performance in their applications.

Our libraries are high-performance and add robust PDF functionality to enterprise, mobile and cloud applications across all platforms. They use the most popular languages and environments. A modern tech stack is essential for integrating with the platform you are working on. Our products are constantly improved and receive new features each month. As your project evolves and your requirements change, we will grow with you. You won’t require high level PDF knowledge as our core API is designed to deliver a seamless developer experience across all 7 of our platforms: Web, Windows, Android, iOS, Mac, UWP and Linux. The developers at Foxit are known for successfully managing edge cases and work with 100% of PDF files across every standard. When you only have to work with one SDK, you decrease your exposure to third parties. Foxit will provide support by real developers, as well as, sample projects, demos, API docs and more for every SDK feature.

This contemporary cloud infrastructure provides a variety of freemium microservices and productivity-focused solutions across multiple domains, including compression and unified APIs that operate seamlessly on any platform, client, or programming language, along with an innovative SaaS licensing model. Comprehensive guides and thorough documentation outline all essential procedures for authentication, API communication, document processing, and error management, while also highlighting best practices for optimal efficiency. A simple and user-friendly ASP.NET Core MVC application serves as an example of how to integrate DocuVieware via the PassportPDF Rest API for document visualization. This application is designed to evolve progressively, with additional similar demonstrations added in the future. Furthermore, a streamlined ASP.NET 4.6.2 application also showcases the use of DocuVieware through the PassportPDF Rest API for the same purpose, reinforcing the versatility and adaptability of these tools in various development environments.

The Apache PDFBox® library serves as a versatile open-source tool in Java for managing PDF documents. This project facilitates the creation of new PDFs, as well as the modification of existing ones and the extraction of content from those documents. Additionally, Apache PDFBox features a variety of command-line utilities that enhance its functionality. Released under the Apache License v2.0, this library allows users to extract Unicode text from PDFs, split a single PDF into multiple files, or combine several PDFs into one. It also enables the extraction of data from forms or the filling of PDF forms, along with validating PDF files according to the PDF/A-1b standard. Users can print PDFs via the standard Java printing API, create new PDFs from scratch that include embedded fonts and images, and save PDFs as image files like PNG or JPEG. Furthermore, the library offers the capability to digitally sign PDF documents, enhancing their authenticity and security. It's important to note that users should review the export control information concerning the encryption features provided by Apache PDFBox for compliance with regulations.

Enhance your projects by incorporating powerful PDF editing, parsing, and rendering capabilities using a sophisticated PDF library SDK. This versatile multi-platform shared library (available as dll, so, and dylib) features a C-compatible interface that supports various programming languages, including C#.Net, Python, Java 8, and C++ 11. With APIs designed for Linux, Windows, and Mac, this SDK includes numerous interface functions that allow for the transformation and creation of new PDF content, offering extensive options and flexibility tailored to the unique requirements of your project. It efficiently leverages multi-core CPUs for stream decoding and content rendering, adhering closely to the guidelines of the portable document format specification. Users can also apply electronic signatures, with the choice of including or excluding a cryptographic security layer. Additionally, the SDK provides robust PDF encryption and decryption capabilities, featuring a password-based encryption handler, along with comprehensive document structure manipulation tools for creating, deleting, moving, inserting, extracting, resizing, and rotating pages. This ensures that all aspects of PDF management are covered effectively, making it an invaluable resource for developers.

With a minimal amount of code, LEADTOOLS libraries offer developers a robust PDF API that facilitates dependable and multi-threaded PDF operations, eliminating the necessity for external dependencies such as Acrobat. The extensive PDF controls enable users to read, write, convert, and display PDF files, integrating seamlessly with cutting-edge OCR, ICR, OMR, forms recognition, virtual printing, and scanning APIs to craft comprehensive solutions that leverage the PDF format effectively. Users can effortlessly load and view any PDF document through the document viewer API framework. Rigorously tested against countless PDF files, the LEADTOOLS PDF SDK libraries ensure exceptional viewing precision and performance that surpasses many leading PDF reading tools on the market. By addressing common discrepancies and issues associated with different PDF file versions, LEADTOOLS allows developers to work with confidence, reducing their testing time significantly and enabling the swift creation of top-tier PDF applications. Furthermore, this efficiency not only streamlines the development process but also enhances overall user satisfaction with the final products.

The Aquaforest SDK is an extensive suite designed for PDF processing that encompasses features such as content extraction, the generation of searchable PDFs, and OCR capabilities utilizing both the standard Aquaforest engine and the enhanced Canon IRIS engine, alongside handwriting recognition facilitated by Google and Microsoft APIs. With a robust PDF and barcode toolkit, it boasts high performance and can leverage up to 64 cores for processing tasks. This SDK provides the ability to analyze PDF documents efficiently, automatically extracting name/value pairs for further use. It offers numerous manipulation features, including PDF merging, handling attachments, extracting content, processing XMP metadata, and validating PDF/A compliance, among others. Notably, the standard OCR engine supports 23 languages and is available across all SDK editions, allowing for versatile usage. Furthermore, this tool integrates seamlessly with Google and Microsoft’s cloud OCR services, proving particularly beneficial for unique scenarios such as handwriting recognition. Additionally, the SDK is proficient in reading and identifying a wide range of standard barcode formats, enhancing its functionality in various applications.

jPDFOptimizer, a Java library that optimizes and reduces the size of PDF documents, is available. jPDFOptimizer removes unnecessary objects from PDF documents, detects and merges duplicate images and fonts, as well as altering image resolution, compression, and color spaces to reduce their size. The library offers a simple, but powerful API that allows the calling application to fine tune how to optimize documents. jPDFOptimizer uses Qoppa Software's extensive PDF technology. It does not require any third-party software or drivers. The library is 100% Java, and can be used on any operating system that has a standard Java implementation such as Windows, Linux and Solaris. Features -Modify image resolution, color space and compression -Compress images with JPEG 2000, JPEG 2000, and JBIG2 -Compress data streams -Remove any unused items -Remove duplicate images and fonts and merge them -Flexible optimization options Linearize PDFs for quick web view Support for the latest PDF format Support for JDK 1.6+

jPDFEditor is for developers and integrators. Qoppa Software offers PDF Studio, a desktop PDF editor for Mac, Windows, and Linux that uses the same solid PDF technology. jPDFEditor allows you to load documents from files on a network or local drive, from a URL, and from Java input streams. This is useful for documents that are generated in runtime or from other sources such as a database. The library can save documents after editing them. Features -Display PDF files -Print PDF files Convert text and image files (gif. png. jpg. tiff) to PDF easily Fill out and save interactive PDF forms -Markup PDFs (all PDF annotations & text markups supported). Digitally sign PDF files -Content editing -Redaction Optional OCR module -Optional Comparison Module -Access the powerful PDF manipulation API of jPDFProcess -Text search, selection and copy -Easy navigation using thumbnail, bookmark, annotation, and signature views Advanced tools: zoom, loupe and snapshot.

Aspose.PDF offers an extensive suite of tools for PDF manipulation and parsing, catering to both developers and end-users alike. The Aspose.PDF for .NET serves as a sophisticated PDF Processing API designed for .NET Core, enabling seamless document management and manipulation across various platforms. This API allows users to easily create, modify, convert, render, secure, and print PDF documents without the need for Adobe Acrobat. Additionally, it includes features such as document compression, capabilities for creating and manipulating tables, functions for handling graphs and images, comprehensive hyperlink management, as well as tasks involving stamps and watermarks. Extended security options and custom font handling are also part of its offerings. In parallel, Aspose.PDF for Java is a nimble processing API that supports the creation, modification, rendering, securing, and printing of PDF files, again without relying on Adobe Acrobat. This API is also versatile, with support for various formats including TXT, HTML, PCL, XML, XPS, and image files, making it an all-encompassing solution for diverse document needs. With such a comprehensive range of functionalities, Aspose.PDF stands out as a go-to resource for anyone looking to handle PDF documents efficiently.