# Best PDF SDKs Software *By [Adam Crivello](https://research.g2.com/insights/author/adam-crivello)* Portable document format software developer kits (PDF SDKs) are specialized SDKs that facilitate the development of PDF-related functionality within applications. These solutions provide developers with pre-built components for rapidly embedding document processors, PDF editors, and more into their software products. Developers use PDF SDKs to save time and make PDF-related development as streamlined as possible. By utilizing pre-built components, development teams avoid fabricating PDF solutions from scratch. This software should not be confused with [PDF editors](https://www.g2.com/categories/pdf-editor), which provide user-facing PDF manipulation functionality out of the box. A solution may include both PDF editing and PDF SDK access, but the two feature sets are distinct. To qualify for inclusion in the PDF SDK category, a product must: - Provide developers with pre-built components for PDF-related functionality - Present developers with documentation detailing component usage ## Category Overview **Total Products under this Category:** 27 ## Trust & Credibility Stats **Why You Can Trust G2's Software Rankings:** - 30 Analysts and Data Experts - 1,300+ Authentic Reviews - 27+ Products - Unbiased Rankings G2's software rankings are built on verified user reviews, rigorous moderation, and a consistent research methodology maintained by a team of analysts and data experts. Each product is measured using the same transparent criteria, with no paid placement or vendor influence. While reviews reflect real user experiences, which can be subjective, they offer valuable insight into how software performs in the hands of professionals. Together, these inputs power the G2 Score, a standardized way to compare tools within every category. ## Best PDF SDKs Software At A Glance - **Leader:** [Apryse PDF SDK](https://www.g2.com/products/apryse-pdf-sdk/reviews) - **Easiest to Use:** [Apryse PDF SDK](https://www.g2.com/products/apryse-pdf-sdk/reviews) - **Top Trending:** [Apryse PDF SDK](https://www.g2.com/products/apryse-pdf-sdk/reviews) - **Best Free Software:** [Apryse PDF SDK](https://www.g2.com/products/apryse-pdf-sdk/reviews) ## Top-Rated Products (Ranked by G2 Score) ### 1. [Apryse PDF SDK](https://www.g2.com/products/apryse-pdf-sdk/reviews) Apryse (formerly PDFTron) powers the future of document technology. We help businesses, developers, and enterprises handle documents with unmatched speed, accuracy, and security. Whether running in secure server environments or delivering seamless web-based experiences, Apryse makes document workflows smarter and easier. With Apryse, you can: Embed powerful document features directly into your apps — from viewing and editing to collaboration and compliance. Run at enterprise scale on secure server infrastructure, ensuring reliability without cloud dependencies. Deliver seamless in-browser document experiences with responsive, accessible, and feature-rich web capabilities. Trusted globally, Apryse empowers organizations to simplify operations, enhance productivity, and create exceptional document experiences. Learn more: https://bit.ly/46T0jCt **Average Rating:** 4.2/5.0 **Total Reviews:** 123 **User Satisfaction Scores:** - **Quality of Support:** 8.4/10 (Category avg: 8.7/10) - **Ease of Use:** 8.7/10 (Category avg: 8.9/10) **Seller Details:** - **Seller:** [Apryse](https://www.g2.com/sellers/apryse) - **Company Website:** https://apryse.com - **Year Founded:** 1998 - **HQ Location:** Denver, CO - **Twitter:** @aprysesolutions (381 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/aprysesolutions/ (525 employees on LinkedIn®) **Reviewer Demographics:** - **Who Uses This:** CTO, Product Manager - **Top Industries:** Computer Software, Information Technology and Services - **Company Size:** 50% Small-Business, 42% Mid-Market #### Pros & Cons **Pros:** - Ease of Use (38 reviews) - PDF Editing (24 reviews) - Versatility (19 reviews) - Reliability (17 reviews) - Compatibility (15 reviews) **Cons:** - Learning Curve (16 reviews) - Licensing Issues (14 reviews) - Setup Difficulty (10 reviews) - Expensive (9 reviews) - Poor Documentation (9 reviews) ### 2. [Nutrient SDK](https://www.g2.com/products/nutrient-sdk/reviews) Nutrient SDK (formerly PSPDFKit and ORPALIS) is a document SDK that provides developers with a set out-of-the-box tools to add advanced functionality like PDF viewing, annotation, signing, form fill, and more to their applications. 1. PDF SDK PRODUCTS Our SDK lets you focus on shipping features and not on building PDF software. Accelerate product innovation by integrating prebuilt solutions like PDF viewing, signing, annotating, and editing directly in your web, mobile or desktop app. 2. PDF SERVER PRODUCTS Embed PDF processing capabilities into your server to redact, fill forms, edit PDFs, convert documents, and more. Choose between a .NET or Java PDF library or add a plug and play headless document processor that integrates into any server environment. 3. AI DOCUMENT PROCESSING XtractFlow combines generative AI with Nutrient's machine vision technology to automatically identify, extract, and process data in unstructured documents. 4. PDF API Use hosted PDF API to generate, convert, and modify PDF documents in your workflows. We manage the development and server administration, letting you focus on what you do best. **Average Rating:** 4.7/5.0 **Total Reviews:** 64 **User Satisfaction Scores:** - **Quality of Support:** 9.4/10 (Category avg: 8.7/10) - **Ease of Use:** 9.0/10 (Category avg: 8.9/10) **Seller Details:** - **Seller:** [Nutrient](https://www.g2.com/sellers/nutrient) - **Company Website:** https://www.nutrient.io/ - **Year Founded:** 2011 - **HQ Location:** Raleigh, North Carolina USA - **Twitter:** @nutrientdocs (4,139 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/nutrientdocs (137 employees on LinkedIn®) **Reviewer Demographics:** - **Top Industries:** Computer Software, Information Technology and Services - **Company Size:** 55% Small-Business, 39% Mid-Market #### Pros & Cons **Pros:** - Ease of Use (10 reviews) - Reliability (10 reviews) - Customer Support (8 reviews) - Features (5 reviews) - Intuitive (5 reviews) **Cons:** - Expensive (4 reviews) - Pricing (4 reviews) - Pricing Concerns (4 reviews) - Learning Curve (2 reviews) - Accessibility Issues (1 reviews) ### 3. [Foxit PDF SDK](https://www.g2.com/products/foxit-pdf-sdk/reviews) Foxit is the Industry Leader in PDF SDK Technology, we open billions of PDF’s every day. Our Clients include household names, such as: Google, Amazon, IBM, Intel, Microsoft, J.P. Morgan, Bank of America, NASDAQ, as well as upcoming startups. We offer 7 x Platforms: Web, Windows, iOS, Android, Mac, Linux & UWP which support modern languages and frameworks. Our 150+ features include: Viewer, Annotations, Forms, Digital Signatures, Edit & Manipulate, Security, Redaction, Full-Text Search, Creation and much more. We have 330 Million End Users, 100+ Thousand Clients in 170 Countries. You will be supported by 200+ Developers with 15+ Years Development Experience. Our Support and our Dedicated Solution Engineers are located all over the globe. We offer flexible licensing and partnership opportunities. Download our Foxit PDF SDK and try it out today. **Average Rating:** 4.5/5.0 **Total Reviews:** 52 **User Satisfaction Scores:** - **Quality of Support:** 8.5/10 (Category avg: 8.7/10) - **Ease of Use:** 9.2/10 (Category avg: 8.9/10) **Seller Details:** - **Seller:** [Foxit](https://www.g2.com/sellers/foxit) - **Company Website:** https://www.foxit.com/ - **Year Founded:** 2001 - **HQ Location:** Fremont, CA - **Twitter:** @foxitsoftware (6,221 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/foxit-corporation/ (559 employees on LinkedIn®) **Reviewer Demographics:** - **Top Industries:** Computer Software - **Company Size:** 37% Small-Business, 33% Mid-Market ### 4. [iText by Apryse](https://www.g2.com/products/itext-by-apryse/reviews) Now part of the Apryse family, iText is one of the best-documented and most versatile PDF SDKs in the world. The open-source iText Core library features a powerful layout engine and intuitive high-level APIs for document creation and manipulation, digital signing and validation, and much more. It has built-in support for PDF 2.0, all variants of PDF/A and PDF/UA, FIPS-140-2 and the very latest ISO standards for digital signatures and encryption. You can extend iText's capabilities even further, with add-ons for comprehensive HTML/XML and CSS templating, global language and writing systems, secure document redaction, OCR, document optimization, and working with dynamic XFA. iText Core is free to use under the AGPLv3 license, while a commercial license releases you from the AGPL terms and gives you professional support and maintenance. Visit the iText website at https://itextpdf.com/ to try the entire iText Suite free for 30 days, while keeping your IP safe under iText's commercial license terms. **Average Rating:** 4.2/5.0 **Total Reviews:** 26 **User Satisfaction Scores:** - **Quality of Support:** 8.2/10 (Category avg: 8.7/10) - **Ease of Use:** 7.9/10 (Category avg: 8.9/10) **Seller Details:** - **Seller:** [Apryse](https://www.g2.com/sellers/apryse) - **Year Founded:** 1998 - **HQ Location:** Denver, CO - **Twitter:** @aprysesolutions (381 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/aprysesolutions/ (525 employees on LinkedIn®) **Reviewer Demographics:** - **Who Uses This:** Software Engineer - **Top Industries:** Computer Software - **Company Size:** 52% Small-Business, 34% Enterprise ### 5. [Adobe PDF Library by Datalogics](https://www.g2.com/products/adobe-pdf-library-by-datalogics/reviews) Adobe PDF Library SDK gives developers the tools to solve even the most complex PDF workflows. SOC 2 Type 2 certified. 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. Flexible programming language and platform options include .NET, .NET Framework, Java and C/C++ on Windows, Linux, MacOS; NuGet & Maven; pdfRest API Toolkit Container option. Free trial with proof of concept support, join us on Discord or use our AI assistant for help. Our expertise and support is the reason we have a 94% customer retention rate. Need more info? Ask our AI Assistant "Scout" on our website or join the Datalogics Discord server. Capabilities include but are not limited to: -Annotations -Archiving with PDF/A -Content creation -Content modification – change layers, change configurations, flatten transparencies, merge, split, underlines, highlights, watermarks -Color management -Extraction - text, images, forms -Compression/optimize -Conversion - PDF/A, PDF/X, EPS, PostScript, XPS, ZUGFeRD, color -Display -Digital Signature -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 - Optical Character Recognition - add text to document, add text to image -PDF to Office Documents (Word, Excel, PPT) -Printing -Security - Viewer settings, redactions, password, encrypt/decryption, watermark -Text modifications Our extensive documentation includes getting started guides, API references, and hundreds of sample code examples on GitHub to help developers precisely create and define PDF workflow solutions. Pricing for Adobe PDF Library is based on your business model & software usage, starting at $5,999 for internal use. Please contact us for OEM & SaaS pricing. Details: OEMs Customers incorporating our PDF software into an application for external distribution pay a flat annual fee per platform and a royalty based on product distribution. The royalty fee is based on a percentage of sales, a flat fee per unit, or fixed distribution – based on how you license your product. SaaS Customers using our PDF software in an externally accessible service (SaaS) license the software based on the number of servers deployed or a customized model based on users, activations, quantity of documents processed, or revenue. Internal Usage/End-Users Starting at $5,999, licensing is based on the number of servers or desktops where the software is deployed. Download a free trial today and get started! **Average Rating:** 4.1/5.0 **Total Reviews:** 5 **User Satisfaction Scores:** - **Quality of Support:** 8.3/10 (Category avg: 8.7/10) - **Ease of Use:** 6.7/10 (Category avg: 8.9/10) **Seller Details:** - **Seller:** [Datalogics](https://www.g2.com/sellers/datalogics) - **Year Founded:** 1967 - **HQ Location:** Wilmington, US - **LinkedIn® Page:** https://www.linkedin.com/company/datalogics/ (44 employees on LinkedIn®) **Reviewer Demographics:** - **Company Size:** 60% Enterprise, 20% Small-Business ### 6. [React PDF Kit](https://www.g2.com/products/react-pdf-kit/reviews) React PDF Kit is a powerful PDF viewer component built in React.js. Unlike iframe-based viewers or generic wrappers, React PDF integrates natively into your React app, providing full control over the viewing experience with minimal setup. With developer-first features like flexible toolbar customization, zoom and layout control, page rendering hooks, and clear documentation, it enables teams to render PDF viewer into their applications easily. React PDF Kit integrates well with various React framework such as Next.js, Remix, Gatsby and Docusaurus. It is compatible with React 18 and React 19. Ideal for teams looking to an AI tool, document management system, or just a PDF reader. React PDF offers the performance and flexibility needed for production-grade applications. React PDF is regularly updated with dedicated support. It includes a perpetual license model with 1-year support and version updates. **Average Rating:** 4.8/5.0 **Total Reviews:** 3 **User Satisfaction Scores:** - **Quality of Support:** 6.7/10 (Category avg: 8.7/10) - **Ease of Use:** 8.9/10 (Category avg: 8.9/10) **Seller Details:** - **Seller:** [React PDF Kit](https://www.g2.com/sellers/react-pdf-kit) - **HQ Location:** N/A - **LinkedIn® Page:** https://www.linkedin.com/company/No-Linkedin-Presence-Added-Intentionally-By-DataOps (1 employees on LinkedIn®) **Reviewer Demographics:** - **Company Size:** 100% Small-Business ### 7. [ComPDF](https://www.g2.com/products/compdf/reviews) ComPDF, powered by KDAN (TPEx: 7737), is built on the vision of “Leading the Intelligent PDF Era with Continuous Innovation”. ComPDF offers following products: - ComPDF SDK is highly compatible with web, server, desktop, and mobile platforms, seamlessly integrating with various development frameworks. It provides features lincluding generation, viewing, editing, conversion, signing, etc. - ComPDF Cloud delivers a secure, stable, and efficient service environment, simplifying enterprise document processing and business integration workflows. With the flexibility to use either Open API calls or private deployment, enterprises can generate, edit, convert, OCR recognize, and extract data. - ComPDF AI provides intelligent document processing capabilities, enabling automated data extraction, parsing, and knowledge management. Together, these components streamline workflows, improve operational efficiency, and accelerate enterprise digital transformation. **Average Rating:** 4.8/5.0 **Total Reviews:** 2 **User Satisfaction Scores:** - **Quality of Support:** 10.0/10 (Category avg: 8.7/10) - **Ease of Use:** 9.2/10 (Category avg: 8.9/10) **Seller Details:** - **Seller:** [PDF Technologies, Inc](https://www.g2.com/sellers/pdf-technologies-inc) - **Year Founded:** 2013 - **HQ Location:** Singapore, Central Region - **Twitter:** @PDFReaderPro (350 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/pdf-reader-pro/ (4 employees on LinkedIn®) **Reviewer Demographics:** - **Company Size:** 60% Small-Business, 40% Mid-Market ### 8. [DevExpress](https://www.g2.com/products/devexpress/reviews) DevExpress engineers feature-complete Presentation Controls, IDE Productivity Tools, Business Application Frameworks, and Reporting / Dashboard Systems for Visual Studio, Delphi, HTML5 or iOS & Android development. Our product line includes UI components and libraries for desktop and mobile development (WinForms / WPF / WinUI / MAUI / Xamarin / VCL), the web (ASP.NET Core / Blazor / Web Forms / MVC / JavaScript: Angular, React, Vue, jQuery), Office File API, .NET Application Frameworks, ORM Tools, and End-to-End Web Testing. **Average Rating:** 4.8/5.0 **Total Reviews:** 112 **User Satisfaction Scores:** - **Quality of Support:** 9.6/10 (Category avg: 8.7/10) - **Ease of Use:** 8.6/10 (Category avg: 8.9/10) **Seller Details:** - **Seller:** [DevExpress](https://www.g2.com/sellers/devexpress-e81ea598-e8d7-44b2-bd94-3c522ccf1c02) - **Year Founded:** 1998 - **HQ Location:** Glendale, CA - **Twitter:** @DevExpress (8,528 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/230052 (189 employees on LinkedIn®) **Reviewer Demographics:** - **Top Industries:** Computer Software, Information Technology and Services - **Company Size:** 70% Small-Business, 16% Mid-Market #### Pros & Cons **Pros:** - Customer Support (2 reviews) - Features (2 reviews) - Product Quality (2 reviews) - Code Editing (1 reviews) - Documentation (1 reviews) **Cons:** - Missing Features (1 reviews) - Navigation Issues (1 reviews) - Not Intuitive (1 reviews) - Performance Issues (1 reviews) - Poor Customer Support (1 reviews) ### 9. [PDF SDK](https://www.g2.com/products/pdf-sdk/reviews) PDF SDK generates and modifies PDF files easily and fast. It is available in C# and VB.NET. It allows PDF conversion and multimedia, annotations support. It is based on innovative sophisticated technologies. Regular updates and documentation are included. Developer-friendly interface and awesome support provided. **Average Rating:** 4.3/5.0 **Total Reviews:** 2 **Seller Details:** - **Seller:** [Artifex Software](https://www.g2.com/sellers/artifex-software) - **Year Founded:** 1993 - **HQ Location:** San Francisco, US - **Twitter:** @Artifex (208 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/17906433/ (23 employees on LinkedIn®) **Reviewer Demographics:** - **Company Size:** 100% Mid-Market, 50% Small-Business ### 10. [RadaeePDF](https://www.g2.com/products/radaeepdf/reviews) Use RadaeePDF SDK in the applications you develop for your customers and in your software products to deliver rich, complete PDF file management capabilities. Your applications will display, edit, annotate, sign, and manipulate any PDF file. Your microservices will generate PDF/A files, convert DOCX documents, and optimize files and reports for archiving and web delivery. Trusted by organizations such as IEEE, Namirial, Bank of Scotland, Apparound, IBM, and Deutsche Bahn, as well as small and medium businesses and startups worldwide. Available on Android, Windows UWP, iOS, and Linux through native languages and cross-platform frameworks. **Average Rating:** 4.3/5.0 **Total Reviews:** 2 **User Satisfaction Scores:** - **Quality of Support:** 6.7/10 (Category avg: 8.7/10) - **Ease of Use:** 9.2/10 (Category avg: 8.9/10) **Seller Details:** - **Seller:** [RadaeePDF](https://www.g2.com/sellers/radaeepdf) - **HQ Location:** Cavriago, IT - **LinkedIn® Page:** http://www.linkedin.com/company/radaeepdf (1 employees on LinkedIn®) **Reviewer Demographics:** - **Company Size:** 67% Small-Business, 33% Mid-Market ### 11. [Vue PDF Viewer](https://www.g2.com/products/vue-pdf-viewer/reviews) Vue PDF Viewer is a developer-focused PDF viewing component built specifically for Vue.js and Nuxt applications. Unlike iframe-based viewers or generic wrappers, it integrates natively into the Vue rendering lifecycle, giving teams full control over layout, behavior, and customization. Designed for modern frontend workflows, Vue PDF Viewer supports advanced PDF rendering layers including text, canvas, and form annotations, while remaining lightweight and performant. Developers can easily customize toolbars, control page rendering, manage zoom and navigation behavior, and integrate the viewer seamlessly into existing Vue layouts. Vue PDF Viewer works well with Vue 3 and Nuxt, supports responsive layouts out of the box, and includes features such as search, print, download, thumbnails, page navigation, theming, and localization. It is suitable for applications ranging from document portals and internal tools to SaaS platforms and AI-driven document workflows. The product follows a developer-friendly licensing model with perpetual licenses and optional renewals for updates and support. Vue PDF Viewer is actively maintained, regularly updated, and backed by clear documentation and responsive technical support. Ideal for teams that need a reliable, flexible, and production-ready PDF viewer that feels native to the Vue ecosystem rather than bolted on. **Average Rating:** 4.3/5.0 **Total Reviews:** 2 **User Satisfaction Scores:** - **Quality of Support:** 8.3/10 (Category avg: 8.7/10) - **Ease of Use:** 9.2/10 (Category avg: 8.9/10) **Seller Details:** - **Seller:** [Vue PDF Viewer](https://www.g2.com/sellers/vue-pdf-viewer) - **HQ Location:** N/A - **LinkedIn® Page:** https://www.linkedin.com/company/No-Linkedin-Presence-Added-Intentionally-By-DataOps (1 employees on LinkedIn®) **Reviewer Demographics:** - **Company Size:** 100% Small-Business ### 12. [Fern](https://www.g2.com/products/fern/reviews) SDKs and Docs for your API **Average Rating:** 5.0/5.0 **Total Reviews:** 1 **User Satisfaction Scores:** - **Quality of Support:** 10.0/10 (Category avg: 8.7/10) - **Ease of Use:** 10.0/10 (Category avg: 8.9/10) **Seller Details:** - **Seller:** [Fern](https://www.g2.com/sellers/fern) - **Year Founded:** 2007 - **HQ Location:** Brooklyn, US - **LinkedIn® Page:** https://www.linkedin.com/company/buildwithfern/about/ (11 employees on LinkedIn®) **Reviewer Demographics:** - **Company Size:** 100% Small-Business ### 13. [pdfFiller](https://www.g2.com/products/pdffiller/reviews) pdfFiller is a cloud-based platform with a comprehensive digital toolkit that makes handling PDFs easy. Edit, sign, store, manage, and collaborate on documents all in one place — no downloads, switching apps, or paying for multiple subscriptions needed. All your documents are safely stored in the cloud, so you can access them anytime, anywhere, without worrying about losing your data. **Average Rating:** 4.6/5.0 **Total Reviews:** 856 **User Satisfaction Scores:** - **Quality of Support:** 9.0/10 (Category avg: 8.7/10) - **Ease of Use:** 9.1/10 (Category avg: 8.9/10) **Seller Details:** - **Seller:** [airSlate](https://www.g2.com/sellers/airslate) - **Company Website:** https://www.airslate.com/ - **Year Founded:** 2006 - **HQ Location:** Brookline, Massachusetts - **Twitter:** @airSlate (1,233 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/airslate/ (816 employees on LinkedIn®) **Reviewer Demographics:** - **Who Uses This:** Owner, President - **Top Industries:** Real Estate, Insurance - **Company Size:** 82% Small-Business, 13% Mid-Market #### Pros & Cons **Pros:** - Ease of Use (44 reviews) - Easy Editing (31 reviews) - Form Filling (25 reviews) - Editing (21 reviews) - E-Signing Features (21 reviews) **Cons:** - Missing Features (9 reviews) - Expensive (8 reviews) - Not-User Friendly (6 reviews) - Feature Limitations (5 reviews) - PDF Issues (5 reviews) ### 14. [pdf noodle](https://www.g2.com/products/pdf-noodle/reviews) Build PDF workflows in minutes, not sprints. Skip the Figma-to-HTML-to-PDF nightmare. Design templates with AI, tweak visually or in code, then generate invoices, reports, and contracts that look professional. No design skills needed. **Average Rating:** 5.0/5.0 **Total Reviews:** 1 **User Satisfaction Scores:** - **Quality of Support:** 10.0/10 (Category avg: 8.7/10) - **Ease of Use:** 10.0/10 (Category avg: 8.9/10) **Seller Details:** - **Seller:** [pdf noodle](https://www.g2.com/sellers/pdf-noodle) - **Year Founded:** 2024 - **HQ Location:** N/A - **LinkedIn® Page:** https://www.linkedin.com/company/pdforge/ (1 employees on LinkedIn®) **Reviewer Demographics:** - **Company Size:** 100% Small-Business #### Pros & Cons **Pros:** - Affordable (1 reviews) - Document Editing (1 reviews) - Ease of Creation (1 reviews) - Ease of Use (1 reviews) - Easy Editing (1 reviews) ### 15. [PDF Tools SDK](https://www.g2.com/products/pdf-tools-sdk/reviews) PDF Toolbox SDK is part of Pdftools’ portfolio of quick-to-integrate products that make processing documents a breeze, whether you have thousands of documents or millions. Details PDF Toolbox SDK lets you quickly create high-quality PDF/A-compliant documents from scratch via source code. Add any content such as text and images to existing PDFs and merge and split PDF documents. Designed for ​​document-heavy industries, PDF Toolbox SDK lets you: - Edit PDF Add or remove information like text, stamps, or images. - Create PDFs Generate new PDFs as separate files or merge them with existing PDF files. - Annotate and add forms Create, fill, and extract PDF forms via code. You can also remove, modify, and add annotations. Extensive documentation is available for developers who want to implement PDF Toolbox SDK into their document-processing workflows. \_\_\_\_ About Pdftools Pdftools provides software solutions and developer components for creating, manipulating, and validating PDF and PDF/A files at scale. The company was founded in 2002 by Dr. Hans Bärfuss, a globally renowned PDF expert. In 2022, Pdftools joined forces with Smallpdf to deliver even better document-processing products to its customers. **Average Rating:** 4.5/5.0 **Total Reviews:** 1 **User Satisfaction Scores:** - **Ease of Use:** 8.3/10 (Category avg: 8.9/10) **Seller Details:** - **Seller:** [Pdftools](https://www.g2.com/sellers/pdftools) - **Year Founded:** 2002 - **HQ Location:** Zürich, CH - **LinkedIn® Page:** https://www.linkedin.com/company/pdf-tools-ag (44 employees on LinkedIn®) **Reviewer Demographics:** - **Company Size:** 100% Small-Business ### 16. [Acrobat SDK](https://www.g2.com/products/acrobat-sdk/reviews) The Adobe Acrobat Software Development Kit is a comprehensive suite of tools designed to assist developers in creating applications that integrate seamlessly with Adobe Acrobat and Acrobat Reader. It includes header files, type libraries, utilities, sample code, and extensive documentation, facilitating the development of software that interacts with Acrobat technology. Key Features and Functionality: - JavaScript Integration: Developers can write scripts to extend Acrobat or Acrobat Reader functionality, either embedded within PDF documents or as external scripts. - Plug-in Development: The SDK allows for the creation of plug-ins using C++ that dynamically link to and enhance the capabilities of Acrobat or Acrobat Reader. - Interapplication Communication : Developers can write separate applications that control Acrobat functionality through interapplication communication methods such as DDE and OLE on Windows, and Apple events/AppleScript on Mac OS. - 64-bit Support: The SDK provides 64-bit public headers, enabling developers to create or upgrade their plug-ins to 64-bit, ensuring compatibility with the latest versions of Acrobat. Primary Value and User Solutions: The Acrobat SDK empowers developers to customize and extend the functionality of Adobe Acrobat and Acrobat Reader, enabling the creation of tailored solutions that meet specific user needs. By providing robust tools for JavaScript scripting, plug-in development, and interapplication communication, the SDK facilitates the development of applications that can manipulate PDF documents, automate workflows, and integrate seamlessly with other software systems. This flexibility allows organizations to enhance productivity, streamline document management processes, and deliver customized user experiences. **Seller Details:** - **Seller:** [Adobe](https://www.g2.com/sellers/adobe) - **Year Founded:** 1982 - **HQ Location:** San Jose, CA - **Twitter:** @Adobe (955,605 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/1480/ (41,539 employees on LinkedIn®) - **Ownership:** NASDAQ:ADBE **Reviewer Demographics:** - **Company Size:** 100% Enterprise ### 17. [Aspose.SDK](https://www.g2.com/products/aspose-sdk/reviews) Aspose.PDF offers a comprehensive suite of free online applications designed to facilitate various operations on PDF files across multiple platforms. Users can effortlessly view, convert, edit, merge, split, annotate, and secure PDF documents without the need for specialized software installations. Key Features and Functionality: - PDF Viewing: Open and view PDF files directly in the browser. - Conversion Tools: Convert PDFs to and from various formats, including Word, Excel, PowerPoint, and images. - Editing Capabilities: Add or remove text, comments, and highlights within PDF documents. - Merging and Splitting: Combine multiple PDFs into one or extract specific pages to create new documents. - Annotation Management: Insert, edit, or remove annotations, watermarks, and signatures. - Security Features: Encrypt PDFs with passwords, remove existing security restrictions, and add digital signatures. - Optimization Tools: Compress PDF files to reduce size without compromising quality. - Metadata Editing: View and modify PDF metadata information. Primary Value and User Solutions: Aspose.PDF addresses the need for accessible, user-friendly tools to manage PDF documents without requiring software installations. By offering a wide range of functionalities online, it empowers users to perform essential PDF operations efficiently, enhancing productivity and streamlining document management tasks. **Seller Details:** - **Seller:** [Aspose](https://www.g2.com/sellers/aspose) - **Year Founded:** 2002 - **HQ Location:** Sydney, AU - **Twitter:** @aspose (13,067 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/aspose/ (138 employees on LinkedIn®) ### 18. [Definely PDF](https://www.g2.com/products/definely-pdf/reviews) Definely PDF is a specialized tool designed to enhance the review and comprehension of legal documents in PDF format. By enabling users to access critical information—such as cross-references, defined terms, and unused terms—with a simple double-click, it ensures that professionals can efficiently navigate complex legal texts without losing context. **Seller Details:** - **Seller:** [Definely](https://www.g2.com/sellers/definely) - **Year Founded:** 2017 - **HQ Location:** London, GB - **LinkedIn® Page:** https://www.linkedin.com/company/trydefinely/ (96 employees on LinkedIn®) ### 19. [Foxit Document Workflow APIs](https://www.g2.com/products/foxit-document-workflow-apis/reviews) Foxit offers a comprehensive suite of cloud native APIs designed to automate, secure, and modernize every stage of the document lifecycle. Built on scalable REST architecture, these APIs give developers and enterprise teams the tools to generate, transform, sign, and display documents directly within their applications, eliminating manual processes and ensuring fast, consistent digital workflows. The Foxit PDF Services API delivers high performance automation for PDF creation, conversion, extraction, and optimization at scale. Ideal for operations teams handling bulk document tasks, it supports everything from large volume report generation to precise data extraction and certified redaction. With encryption in transit and at rest, role-based access, PDF/A export, and infrastructure that meets SOC 2 Type II and HIPAA-ready requirements, the API enables secure deployment in even the most regulated environments. For organizations that rely on consistent and personalized document output, the Foxit Document Generation API streamlines the production of professional PDFs and DOCX files using dynamic templates. Real time data from CRMs, ERPs, or online forms flows seamlessly into branded layouts built in Word or HTML. Developers use this API to automate quotes, contracts, disclosures, onboarding forms, and other documents where accuracy and compliance are essential. Enterprise-grade security—including TLS 1.2+, AES-256 encryption, and SOC 2 Type II–certified infrastructure—ensures protected, standards-aligned document creation. The Foxit eSign API embeds fully auditable, legally binding eSignature workflows directly into applications and business systems. It offers complete control over signer flows, authentication, approvals, and audit trails, enabling teams to power customer facing signing experiences or large scale internal approval processes. Supporting HIPAA, SOC 2, eIDAS, ESIGN, and 21 CFR Part 11 compliance, the API helps organizations accelerate agreements without sacrificing security or regulatory alignment. Rounding out the platform, the Foxit PDF Embed API provides seamless, customizable in-app PDF viewing with support for annotations, form filling, and secure access controls. With lightweight JavaScript integration and options for modifying toolbars, permissions, and themes, developers can deliver a fully branded document experience. The API is built for secure environments requiring password protection, RBAC, SAML-based SSO, PDF/A output, and HIPAA-ready deployment. Together, Foxit’s APIs equip organizations with a powerful, secure, and flexible foundation for end-to-end document automation and digital transformation. **Seller Details:** - **Seller:** [Foxit](https://www.g2.com/sellers/foxit) - **Company Website:** https://www.foxit.com/ - **Year Founded:** 2001 - **HQ Location:** Fremont, CA - **Twitter:** @foxitsoftware (6,221 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/foxit-corporation/ (559 employees on LinkedIn®) ### 20. [GDPicture.net](https://www.g2.com/products/gdpicture-net/reviews) Use GdPicture.NET Imaging SDK to capture, compose, display, annotate, clean-up, edit and print documents from within WinForm, WPF and WEB applications **Seller Details:** - **Seller:** [Nutrient](https://www.g2.com/sellers/nutrient) - **Year Founded:** 2011 - **HQ Location:** Raleigh, North Carolina USA - **Twitter:** @nutrientdocs (4,139 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/nutrientdocs (137 employees on LinkedIn®) - **Phone:** +1 888 356 4219 ### 21. [Grapes Studio SDK](https://www.g2.com/products/grapes-studio-sdk/reviews) The Grapes Studio SDK is a developer toolkit that allows you to seamlessly integrate the Grapes Studio editor directly into your own application, providing your users with an intuitive, no-code HTML builder experience. Designed for flexibility, the SDK offers extensive customization options, allowing you to tailor the editor’s appearance, features, and workflow to match your platform’s unique requirements. With clear documentation, APIs, and modular components, the SDK makes it easy for developers to adapt Grapes Studio, whether you need a lightweight editor for basic HTML or a full-featured builder for complex layouts. By embedding Grapes Studio with the SDK, you empower your users to create professional web pages and email templates directly within your application—no coding required **Seller Details:** - **Seller:** [Grapes Studio](https://www.g2.com/sellers/grapes-studio) - **Year Founded:** 2024 - **HQ Location:** N/A - **LinkedIn® Page:** https://www.linkedin.com/company/grapes-studio/ (5 employees on LinkedIn®) ### 22. [iLoveAPI](https://www.g2.com/products/iloveapi/reviews) iLoveAPI helps you automate document workflows inside your product or system. It gives you everything you need to handle document and image files automatically, from converting and compressing to merging, editing, and e-signing, helping files move smoothly through your systems from creation to completion. Built on the same trusted platform as iLovePDF, iLoveAPI is secure, scalable, and easy to integrate. With clear documentation, official libraries, and infrastructure proven at scale, it enables teams to automate document processes with confidence and focus on delivering better experiences. **Seller Details:** - **Seller:** [iLovePDF](https://www.g2.com/sellers/ilovepdf-6341afd1-19b3-489b-84db-5e8e201bc56a) - **HQ Location:** N/A - **LinkedIn® Page:** https://www.linkedin.com/company/No-Linkedin-Presence-Added-Intentionally-By-DataOps (1 employees on LinkedIn®) ### 23. [Kdan PDF SDK](https://www.g2.com/products/kdan-pdf-sdk/reviews) Kdan PDF SDK is a universal mobile library for developers who want to render, manipulate and annotate PDF files in their iOS, Android, and Windows applications. Kdan PDF SDK extends your app's features with a set of professional PDF capabilities on smartphones and tablets. -Complete PDF API We offer a variety of flexible kit plans. Developers can start with our demo version and select the plan that meets their needs. -Stable Viewer Engine Kdan's PDF viewer engine has been perfected by 10 years of innovation and experience. We introduce regular updates to ensure the stablity of your apps. -Easy to Integrate The PDF SDK easily integrates within your app using our SDK documentation and gives you more time to focus on designing your app. -Cross-Platform SDK No matter what platform you integrate with, our PDF SDK helps developers build powerful apps that can view, edit, and annotate PDFs. -Unparalled Developer Experience Create great apps regardless of your team's preferred language. Kdan PDF SDK works with mainstream programming languages, including Objective-C, Java, and C#. -Fully Customizable Developers can design unique user experiences with fully customizable UI source code or use the default built-in Ul elements directly for your apps. **Seller Details:** - **Seller:** [KDAN](https://www.g2.com/sellers/kdan) - **Year Founded:** 2009 - **HQ Location:** Irvine, California - **LinkedIn® Page:** https://www.linkedin.com/company/2103738/ (241 employees on LinkedIn®) ### 24. [LEADTOOLS PDF Pro](https://www.g2.com/products/leadtools-pdf-pro/reviews) Apryse Announces Acquisition of AI-Powered Document Toolkit Provider LEAD Technologies Apryse, the global leader in document processing technology, has announced its most recent acquisition of LEAD Technologies, a leading provider of AI-powered SDKs for application development across all major platforms and programming languages. The acquisition furthers Apryse’s reputation for creating the world’s most advanced and complete document processing platform for enterprises, strengthening both its product portfolio and healthcare capabilities. Read the update: https://apryse.com/blog/news/apryse-acquires-ai-toolkit-leadtools The Apryse product portfolio will now include LEAD’s flagship product, LEADTOOLS, which provides programmers with a powerful set of libraries for recognition, document, vector, medical, imaging, and multimedia development. The acquisition also extends Apryse support for DICOM, PACS, medical imaging, and 3D processing solutions for EHR and pharmaceuticals with the addition of LEAD’s healthcare-centric portfolio, Medicor, including MiPACS. LEADTOOLS PDF Pro provides PDF APIs to read, write, raster-view, and update PDF files on all major platforms. With the PDF Pro toolkit, developers can extract text, images, hyperlinks, and metadata from PDF files. The SDK also provides complete control of pages in existing PDF documents. Conversion to PDF/A documents that are ready for archival can be done in a few lines of code. Additionally, with the included LEADTOOLS PDF Optimizer, PDF files can be made web-ready with linearization and compression. LEADTOOLS PDF Pro includes all features of Imaging Pro, such as 165+ formats, compression, image processing, viewers, TWAIN and WIA scanning, and more. This combination of PDF and imaging features makes the LEADTOOLS PDF Pro an extreme value. The LEADTOOLS PDF Pro product is the entry-level SDK that includes PDF APIs. If you are looking for even more value, be sure to check out the LEADTOOLS Document and Medical SDKs. Those include the features of PDF Pro SDK plus provide more advanced PDF functions such as viewing PDF documents as vector and converting PDF documents to Word and hundreds of other formats. **Seller Details:** - **Seller:** [Apryse](https://www.g2.com/sellers/apryse) - **Year Founded:** 1998 - **HQ Location:** Denver, CO - **Twitter:** @aprysesolutions (381 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/aprysesolutions/ (525 employees on LinkedIn®) ### 25. [PDFix SDK](https://www.g2.com/products/pdfix-sdk/reviews) The Enterprise Engine for Automated PDF Accessibility PDFix SDK is a high-performance, cross-platform development library designed to automate PDF accessibility (WCAG 2.1/2.2 & PDF/UA) and structured data extraction at scale. It allows developers to integrate professional-grade remediation directly into their own applications, converting millions of static PDFs into accessible, compliant, and machine-readable documents without manual intervention. The Primary Value: Removing the Manual Bottleneck For organizations managing massive document repositories, manual remediation is impossible. PDFix SDK solves this by providing a programmatic AI Layout Recognition engine. This engine automatically identifies document structures - headings, multi-column text, complex tables, and reading orders - ensuring your organization meets ADA Title II, Section 508, and EAA mandates through pure automation. Key Features & Functionality Automated Accessibility (Auto-Tagging) Programmatically generate semantic tag trees. The SDK identifies headings, lists, and tables to ensure screen-reader compatibility automatically. High-Volume Batch Processing Built for speed and stability, the SDK processes large-scale document sets in backend environments (Windows, Linux, macOS). Structured Data Extraction (JSON/XML/HTML) Convert PDF content into structured formats. It preserves the logical reading order and table relationships, making data available for external databases or web views. Integrated VeraPDF Validation Automate compliance testing. The SDK includes the industry-standard VeraPDF engine to validate documents against PDF/UA standards as part of your automated pipeline. Responsive HTML5 Derivation Automatically transform PDFs into Responsive HTML, allowing documents to be viewed seamlessly on mobile devices while maintaining full WCAG compliance. On-Premises Security The SDK runs entirely within your infrastructure. No data is ever uploaded to a third-party cloud, ensuring 100% privacy and compliance with GDPR, HIPAA, and FERPA. Why PDFix for Scale & Enterprise Document Accessibility? Large organizations face a compliance gap where manual tagging cannot keep up with the volume of generated content. PDFix is engineered specifically to close this gap: High-Velocity Processing: Process thousands of pages per minute. Layout Templates for Consistency: For repetitive documents like bank statements or invoices, PDFix uses rule-based Layout Templates. Security-First Architecture: Unlike cloud services, the SDK runs on-premises and automate accessibility without sensitive data ever leaving environment. Audit-Ready Compliance: Every automated workflow includes integrated VeraPDF validation, generating detailed logs and reports (JSON/XML) to prove compliance for legal audits. **Seller Details:** - **Seller:** [PDFix](https://www.g2.com/sellers/pdfix) - **Year Founded:** 2016 - **HQ Location:** Stupava, SK - **LinkedIn® Page:** https://www.linkedin.com/company/pdfix-inc. (8 employees on LinkedIn®) ## Parent Category [Development Software](https://www.g2.com/categories/development)