Best On-Premises PDF SDK 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.

Apryse (formerly PDFTron) makes documents work harder for you. We give organizations the power to handle the full document lifecycle — from secure server-side processing to smooth web-based collaboration — without relying on third-party services. With Apryse, you can: Integrate advanced document capabilities like viewing, editing, annotation, and e-signature directly into your applications. Deploy on your own infrastructure for maximum control, privacy, and compliance. Scale effortlessly with technology built for high-volume, enterprise-grade workflows. Deliver modern web experiences that are fast, accessible, and reliable across browsers and devices. Trusted worldwide, Apryse helps enterprises, developers, and small businesses simplify workflows, cut costs, and deliver better digital document experiences.

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.

Global OEMs, SaaS and enterprise end-users rely on Adobe PDF Library to automate the creation, editing and management of PDFs. An Adobe partner, our SDK uses the same source code as Acrobat for stability, reliability and quality results. Languages: .NET, .NET Framework, Java and C/C++ Platforms: Windows, Linux & MacOS Package managers: NuGet & Maven Capabilities include but are not limited to: -Annotations -Content creation -Content modification -Color management -Extraction - text, images, forms -Compression/optimize -Conversion - PDF/A, PDF/X, EPS, PostScript, XPS, ZUGFeRD, color -Display, Printing -Extract text, images & other content -Forms - Import, export, flatten static & dynamic XFA forms, AcroForms -Images - extract, import/export, thumbnails, render/rasterize pages, separations -Optimization - size, content, images, etc. -OCR - add text to document, add text to image -PDF to Office Documents (Word, Excel, PPT) -Security - Viewer settings, redactions, password, encrypt/decryption, watermark Pricing options for OEMs, SaaS & end-users are flexible and based on usage. Shorten development times & get to market faster with Adobe PDF Library. Free trial - download today.

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.

CAD6engine is a comprehensive SDK library for developers that outputs technical and financial data, raster images, text, SVG graphics, and DWG/DXF file content into premium-quality PDF documents. Unlike traditional methods, it avoids using the limited Windows printer interface or GDI, delivering high-resolution PDFs with Unicode text support, layers, transparency effects, and multiple color models such as RGB, CMYK, HSB, gray, and CIELab. The engine supports bi-directional conversion between SVG and DWG/DXF file formats and enables the combination of multiple graphical files into one PDF document with customizable objects and text. CAD6engine offers full control over all output parameters, ensuring precise and customizable results. It can be fully integrated into applications, running quietly in the background or optionally displaying a complete graphical user interface for user interaction. The SDK is compatible with C++ compilers that support its dynamic link library (MKCAD6engine.dll) and library file (MKCAD6engine.lib). Designed for C++ developers with basic Win32/x64 knowledge, it supports various development environments and compiler toolchains. CAD6engine is ideal for applications requiring professional PDF generation from CAD and graphic sources.

ComPDFKit PDF SDK is a product of ComPDF, offers a top-quality PDF SDK and PDF API 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. Product Details of ComPDF: - ComPDFKit PDF SDK Our PDF SDK renders PDFs at the fastest speed and provides rich and reliable functionalities including viewing, markup, content & page editing, digital & electronic signing, form filling, OCR, comparing, measuring, etc., satisfying the needs of processing PDFs in different scenarios. - ComPDFKit Conversion SDK Support Convert PDF to or from Word, Excel, PPT, TXT, RTF, PNG, JPG, HTML, JSON, markdown, searchable PDF, etc. - ComIDP ComIDP is the intelligent document processing, allow companies to integrate for unstructured data extracting, knowledge base building, AI Q&A, image pre-processing, PDF parsing, PDF data extraction, PDF table extraction, etc.

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 Xpansion SDK 17 offers features, methods, and functionality that allow software developers to create PDF/A-enabled applications and software solutions. It provides a variety of options for creating, editing, and printing PDF, PDF/A, and XPS documents. These can be used to display and print them on paper and for conversions between these formats and exporting or importing from/to any other file format. PDF Xpansion SDK 17 also includes eInvoicing functionality for formats ZUGFeRD Factur-X, XRechnung, and Factur-X. It allows software developers to integrate EU-compliant electronic billing functionality (creation and display of electronic invoices, as well as the reading and printing thereof) according to EU standard. The SDK allows you to integrate these functions into Windows desktop apps for the PC as well as Windows Apps. It allows for modularized purchases of different functionality. This makes it very flexible and only the features that are actually required can be purchased.

Previously known as iText, we are now a part of Apryse. With optimized technology and a comprehensive suite of tools, Apryse simplifies even the most complex projects, taking you further, faster. Committed to feature-rich products that are made better, Apryse offers superior document solutions across all applications and enterprise workflows. With iText by Apryse, our diverse customer base includes more than half of the Fortune 500 companies, as well as many government agencies and small companies alike. Our software has grown out of the open source space, and we still believe in the value of open source software. Our core library iText 7 Community and earlier versions iText 5, and iText 2 are all available under the AGPL license. We do offer commercial licensing for customers that do not wish to comply with AGPL and would like to keep their source code private. You may have used iText when you: - received a boarding pass from an airline, - received a PDF invoice or receipt, - received a PDF document after filling in a form, - and many more. For more information, visit the Apryse website.

The Aquaforest SDK is a robust set of tools designed for comprehensive PDF processing, offering features such as content extraction, the creation of searchable PDFs, and OCR capabilities powered by both its native engine and extended options from Canon IRIS, along with handwriting recognition via Google and Microsoft APIs. With an advanced PDF and barcode toolkit, it boasts high performance levels, capable of utilizing up to 64 cores for efficient processing. This SDK can effectively analyze PDF documents to automatically extract name/value pairs, facilitating a range of PDF manipulations including merging, attachment processing, content extraction, XMP metadata handling, and PDF/A validation, among others. The standard OCR engine included supports 23 languages and is available in all versions of the SDK, ensuring versatility for various applications. Furthermore, it provides seamless access to Google and Microsoft’s cloud OCR services, which is particularly advantageous for specific tasks such as recognizing handwritten text. Additionally, the SDK has the ability to read and interpret most common barcode formats, enhancing its utility in diverse document processing scenarios.