Build Better Apps Faster with Kdan PDF SDK

Integrate with Kdan PDF SDK library to enable PDF viewing, editing, signing, annotating, and more in your own applications for mobile, desktop, and web.

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Developing with the #1 Mobile PDF Solution

Kdan PDF SDK extends your app's features with a set of professional PDF capabilities on smartphones and tablets.

Windows PDF Library

With C#, C/C++, Python, Java, ASP.NET, ASP.NET Core, VB.NET libraries, ComPDFKit allows you to easily and quickly integrate PDF functionality like viewing, annotating, form filling, signing, and document editing into your Windows applications.

Web PDF Library

With JavaScript, TypeScript and C/C++ libraries, ComPDFKit allows you to easily and quickly integrate PDF functionality like viewing, annotating, form filling, signing, and document editing into your Web applications. Support for all browsers (Chrome, Edge, Firefox, Safari, etc.) and major web frameworks (Electron, Vue, Nuxt, React, Next, Svelte, Angular, ionic angular, etc.).

Android PDF Library

With Kotlin, Java, and C/C++ libraries, ComPDFKit allows you to easily and quickly integrate PDF functionality like viewing, annotating, form filling, signing, and document editing into your Android applications.

iOS PDF Library

With Objective-C, Swift, and C++ libraries, ComPDFKit allows you to easily and quickly integrate PDF functionality like viewing, annotating, form filling, signing, and document editing into your iOS applications.

Mac PDF Library

By leveraging Objective-C, Swift, and C++ libraries, ComPDFKit empowers you to seamlessly and efficiently incorporate advanced PDF features into your Mac applications. This encompasses tasks such as viewing, annotating, form filling, signing, and editing documents.

Server PDF SDK Library

Provide reliable solutions for Server platforms such as Java, .NET Core, Python, PHP, C/C++ and command line tools to process PDF files, supporting multi-threaded and distributed environments. Realize PDF generation, viewing, editing, version comparison, OCR, conversion, and other functions in Server applications.

Flutter PDF SDK

Use the professional Flutter library to integrate PDF functionality into your iOS and Android apps, enjoy Flutter's flexible development experience, high performance, and beautiful interface, and realize PDF preview, editing, signing, cipher marking, annotating, and other functions.

Electron PDF SDK Library

Comprehensive JavaScript PDF processing library that supports the Electron platform to provide a PDF development experience across Cloud, Windows, Mac, Linux, and Chromebook. Support for Electron apps to achieve all you can think of processing PDF features, and take advantage of Electron's desktop features for customization.

PDF API

Professional HTTP API allows you to easily and quickly integrate PDF functionality into applications across all development platforms without worrying about the compatibility of programming languages with the API. Supports remote invocation and private deployment.

Evaluate our SDK today with all features included.
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The Most Comprehensive PDF Features

Kdan's PDF SDK has all the functionality you need. Developers can leverage the power of PDF SDK advantages in your applications.

iOS
Android
Windows
Web
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PDF Viewer
Kdan PDF SDK offers a powerful PDF viewing engine that can render large PDF documents in less time.
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Text Search & Selection
The PDF library supports text search in PDF documents. The library enables text selection to copy words, phrases, and the paragraphs to your clipboard.
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PDF Annotations
Highlight text, handwrite, add notes to PDFs, and more. Mark up PDF documents in your applications equipped with our annotation tools. Your annotations will be compatible with any PDF software.
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PDF Forms
Complete both fillable and non-interactive forms. The PDF library lets users insert handwritten signatures directly into a form when working on invoices, contracts, tax declarations, and more.
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PDF Signature
Whether you need to apply multiple signatures to PDFs or request a signature from your client, the PDF library accelerates your daily tasks by giving your applications the power to sign PDFs effortlessly.
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Page Editor
Embed page editing tools in your applications to split, rotate, rearrange, extract, append, or remove PDF pages easily.
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Watermark
Watermark PDFs with customized text and images for document security. Different watermarks can be added to a single file, and every page can have multiple watermarks.
Try Kdan PDF SDK in your app today.
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Seamless Integration with Kdan PDF SDK

Kdan PDF SDK is easy to integrate into your app, only requiring a few lines of code.System Requirements

Windows(C#)
Web(JavaScript)
Android(Java)
iOS(Object-C)
Mac(Object-C)
Viewing a PDF
Creating an annotation
#import <ComPDFKit/ComPDFKit.h> // Load a document. // This is the container for your PDF file. It can also manage multiple files. NSBundle *bundle = [NSBundle mainBundle]; NSString *pdfPath= [bundle pathForResource:@"Test" ofType:@"pdf"]; NSURL *url = [NSURL fileURLWithPath:pdfPath]; CPDFDocument *document = [[CPDFDocument alloc] initWithURL:url]; // Initialize a CPDFView object with the size of the entire screen. CGRect rect = [[UIScreen mainScreen] bounds]; CPDFView *pdfView = [[CPDFView alloc] initWithFrame:rect]; pdfView.document = document;

Powered by Kdan PDF SDK

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ibon

ibon is designed for connecting ibon cloud printing service. With Kdan PDF SDK integration, the ibon app enables users to preview files before they upload files to ibon cloud. Then they can go to any 7-11 store to print the documents without spending time checking files when using the actual machine.

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Taiwan Intellectual Property Office (TIPO)

Taiwan Intellectual Property Office (TIPO) is an administrative agency responsible for IP policy formulation, IP laws drafting, and inter-agency enforcement coordination. TIPO integrates Kdan's PDF SDK with their intranet document system where the employees can review and edit PDF documents for patent applications, including invention, utility model, and design patents.

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DottedSign

DottedSign is a cloud-based e-sign service. Integrated with Kdan PDF SDK, its iOS and Android apps allow users to facilitate PDF viewing and editing functionalities. Users can add signatures, text and stamps onto PDF documents right from their smart devices.

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Want to test Kdan PDF SDK out?

Contact our sales team for more information or request a free trial.