List of the Top 11 On-Prem PDF SDK in 2025

Pdftools offers robust solutions for handling vast numbers of documents, potentially reaching into the millions. Tailored for sectors that heavily rely on documentation, the Pdftools suite of SDKs aims to enhance the speed, simplicity, and overall ease of your document workflows, reducing stress along the way. Built on reliable SDKs and APIs, Pdftools products integrate effortlessly into your current systems and applications. With the capacity to process thousands of documents each minute, our tools prioritize speed and efficiency. As engineers committed to excellence, we ensure that only the most trustworthy, usable, and well-documented platforms are utilized. While file sizes can be minimized, we guarantee that quality and interactivity remain intact. Additionally, our solutions help ensure that your documents adhere to long-term archiving standards. Comprehensive documentation accompanies every aspect of our products, allowing for a seamless onboarding experience. With Pdftools, you can transform your document management approach and unlock new efficiencies.

Apryse (formerly PDFTron) transforms how organizations manage documents. Built for both server and web applications, Apryse empowers businesses and developers to securely handle the entire document lifecycle — from creation and collaboration to compliance and archiving — without relying on third‑party services. With Apryse, you can: Run at enterprise scale on your own infrastructure, ensuring privacy, compliance, and maximum control. Deliver modern, in‑browser document experiences with fast, accessible viewing, editing, and collaboration tools. Integrate seamlessly across platforms, supporting PDF, Microsoft Office, CAD, and many other file types. Streamline workflows and reduce costs with technology trusted by leading enterprises worldwide. Apryse makes document workflows smarter, faster, and more secure — so teams can focus less on manual processes and more on meaningful work.

Nutrient offers a comprehensive suite of solutions tailored to meet all your PDF needs, providing tools that effortlessly handle PDF functionalities on any platform. 1. SDK: Integrate sophisticated PDF capabilities into iOS, Android, Windows, the web, or any cross-platform technology, offering features such as PDF viewing, annotation, collaboration, and much more. 2. Libraries: Use our robust .NET and Java libraries to empower your backend systems with capabilities for batch processing of redactions and PDF forms, OCR for scanned text, and editing of PDF documents, all directly from your application server. 3. Processor: Our nimble PDF microservice, Processor, facilitates the quick creation of PDFs from HTML, including HTML forms, alongside conversions from Office to PDF, OCR processing, redaction, and the combination and exporting of XFDF. 4. PDF API: Leverage our hosted PDF API to create, convert, and modify PDF documents within your workflows. We manage the development and server operations, allowing you to focus solely on growing your business. At Nutrient, we see ourselves not merely as a tool but as a dedicated partner in your journey to success. You can easily reach out to our engineers for specialized support, access thorough examples to aid in integration, and utilize our premium documentation to maximize your experience. Additionally, we are committed to continuous improvement and innovation, ensuring our solutions evolve with your needs.

Global OEMs, SaaS providers, and enterprise users utilize the Adobe PDF Library to streamline the processes of creating, editing, and managing PDF documents. As an authorized Adobe partner, our SDK is built using the same source code as Acrobat, ensuring top-notch stability, reliability, and quality. Supported programming languages include .NET, .NET Framework, Java, and C/C++, and it is compatible with platforms such as Windows, Linux, and MacOS, with package management facilitated through NuGet and Maven. The library boasts a wide range of capabilities, encompassing annotations, content creation and modification, color management, and various extraction options for text, images, and forms. It also offers features for compression, optimization, and conversion to formats like PDF/A, PDF/X, EPS, PostScript, XPS, and ZUGFeRD, along with robust display and printing options. Moreover, it allows for the import, export, and flattening of both static and dynamic XFA forms, along with AcroForms, and supports a variety of image operations including extraction, rendering, and thumbnail creation. The optimization functionality enhances file size and content, while OCR capabilities enable text addition to documents and images. Additionally, users can convert PDFs to Office formats such as Word, Excel, and PowerPoint, and implement security measures including viewer settings, redactions, password protection, encryption/decryption, and watermarking. Pricing structures are adaptable for OEMs, SaaS solutions, and end-users, based on their specific usage needs. Accelerate your development process and reach the market more swiftly with the Adobe PDF Library; take advantage of the free trial available for download today.

PrizmDoc empowers web developers to incorporate secure and dynamic HTML5 document viewing and editing functionalities, along with native spreadsheet capabilities, directly into their web applications or system solutions. Its remarkable adaptability ensures support across almost any platform and programming language that can perform REST API calls. Users can easily activate or deactivate key features based on the specific requirements of their applications, and implement user-specific permissions to safeguard proprietary information. Additionally, customization of the UI layout and style is available to enhance user experience. PrizmDoc can either be self-hosted within your own infrastructure or utilized via a fully managed backend provided by Accusoft’s public or private cloud services. Furthermore, Accusoft offers exceptional support through its Enablement Services, facilitating a smooth implementation of PrizmDoc for all users. This comprehensive flexibility and support make PrizmDoc an ideal choice for modern web development needs.

CAD6engine is an advanced programming library (SDK) tailored for developers needing to output technical, financial, and graphical data into high-quality PDF files without depending on the constrained Windows printer interface or GDI. It supports the rendering of raster images, Unicode texts, SVG graphics, and DWG/DXF file content with exceptional resolution and fidelity. The SDK enables high-resolution PDF creation featuring layers, transparency, and extensive color model support, including RGB, CMYK, HSB, gray, and CIELab. Developers can convert between SVG and DWG/DXF formats seamlessly and merge multiple graphical files into a single PDF document, adding objects and text with full control over formatting and parameters. CAD6engine runs fully integrated inside applications, either silently in the background or with an optional full graphical user interface for enhanced usability. It is designed for C++ developers with basic familiarity in Win32/x64 programming and supports any compiler compatible with the provided dynamic link library (MKCAD6engine.dll) and static library (MKCAD6engine.lib). The SDK is ideal for software projects requiring precise, customizable PDF generation from CAD files and graphical data. It streamlines workflows by automating PDF creation directly from CAD and vector graphics formats. CAD6engine ensures professional output quality suitable for technical documentation, financial reports, and graphic presentations. Overall, it provides a flexible, powerful toolset to embed PDF output capabilities into your C++ applications with ease.

ComPDF is a brand under PDF Technologies (a KDAN company), offering a range of products including ComPDFKit (PDF SDK and Conversion SDK) and ComIDP (an Intelligent Document Processing solution). Developers and businesses can integrate ComPDF products via SDKs, APIs, or low-code platforms to enable powerful PDF functionalities such as rendering, editing, annotation, conversion, form filling, digital signing, document comparison, measurement, redaction, OCR, and data extraction. 1. 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. 2. Tailored Solutions for Unique Business Demands No matter in construction, education, or any other industry, our specialized solutions streamline your workflows. Whether integrating PDF features into apps or collaborating on PDF editing with teams, we have the ideal solutions tailored for you. - Low-code PDF solution on Make.com, zapier, etc. - Construction - Aviation - Manufacturing - Finance - Education - Printing - Healthcare - Government - Salesforce - Sharepoint - Onedrive - Teams ……

Enhance your application with PDF functionalities by utilizing just two API calls: Open, Edit, and View PDF. With a simple configuration file and these API calls, you can enable your app to swiftly import, view, modify, and open PDF documents within a single day. The SDK is designed to bridge format discrepancies, offering features such as cropping, color management, fills, and font adjustments. It facilitates the conversion of any PDF versions, including the ISO Standard PDF 2.0, allowing for versatility with any PDF file or print-ready document as an input. The conversion process is streamlined, ensuring a smooth experience without any intermediary steps or loss in quality, and it eliminates the need for a printer driver. Compatible with Windows, MacOS, and Linux, the PDF Conversion SDK also supports .NET and comes with sample code for your reference. Additionally, it effectively removes unnecessary data and compresses files, leading to enhanced performance during web and application browsing, making it an efficient choice for developers. By adopting this technology, you can significantly improve the user experience when handling PDF files.

The PDF Xpansion SDK 17 provides a comprehensive suite of features, methods, and capabilities that empower software developers to design applications and solutions that support PDF/A compliance. With an array of tools available for creating, editing, and printing PDF, PDF/A, and XPS documents, users can seamlessly display and print these documents while facilitating conversions and file format exchanges. Additionally, the SDK includes eInvoicing capabilities for ZUGFeRD Factur-X, XRechnung, and Factur-X formats, enabling developers to incorporate EU-compliant electronic billing functionalities that adhere to established standards. This robust framework supports integration into both Windows desktop applications and Windows Apps, offering developers the ability to selectively purchase only the functionalities they need, thus enhancing the SDK’s adaptability and efficiency. Ultimately, this flexibility allows for tailored solutions that meet specific project requirements.

Once operating under the name iText, we are now integrated with Apryse. Our advanced technology and extensive suite of tools enable Apryse to tackle even the most intricate projects, allowing you to progress more swiftly and efficiently. Dedicated to delivering feature-rich products that continuously improve, Apryse provides exceptional document solutions suitable for various applications and enterprise workflows. With iText as a part of Apryse, our clientele encompasses a significant portion of the Fortune 500, alongside numerous government entities and small businesses. Originating from the open source realm, we maintain a strong belief in the importance of open source software. Our primary library, iText 7 Community, along with earlier iterations—iText 5 and iText 2—are all accessible under the AGPL license. For clients who prefer not to adhere to AGPL and wish to keep their source code confidential, we also provide commercial licensing options. You may have encountered iText when you received a boarding pass for a flight, obtained a PDF invoice or receipt, or completed a form that generated a PDF document, among many other uses. To learn more, please visit the Apryse website and explore the various solutions we offer to enhance your document management processes.

The Aquaforest SDK is a comprehensive toolkit tailored for PDF processing, featuring capabilities such as content extraction, the creation of searchable PDFs, and advanced OCR functionalities that utilize both the standard Aquaforest engine and the upgraded Canon IRIS engine, as well as handwriting recognition through Google and Microsoft APIs. It includes a powerful PDF and barcode toolkit optimized for performance, capable of utilizing up to 64 processing cores for various tasks. This SDK enables efficient analysis of PDF documents, automating the extraction of name/value pairs for subsequent applications. Among its extensive manipulation options are features for merging PDFs, managing attachments, extracting content, processing XMP metadata, and ensuring PDF/A compliance, among others. The standard OCR engine remarkably supports 23 languages and is accessible across all SDK versions, which enhances its versatility in multiple contexts. In addition, the tool integrates effortlessly with cloud OCR services from Google and Microsoft, providing significant advantages for specialized tasks like handwriting recognition. The SDK also excels in reading and identifying a diverse array of standard barcode formats, further expanding its potential use cases in various industries. With continuous updates and improvements, the Aquaforest SDK remains a leading choice for developers seeking robust PDF processing solutions.