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C# .NET PDF API Library Examples

Feature-Rich C# .NET PDF API Library for Total Document Control

Document Solutions for PDF (DsPdf, previously GcPdf) allows you to generate documents with speed, memory efficiency with no dependencies.

  • Generate, load, edit, and save PDF documents in C# .NET
  • Support multiple languages with full text, paragraph formatting, and fonts
  • Redact content from PDFs with the new redaction tool
  • View or embed audio and video content in PDF
  • Support hundreds of PDF features
  • All features are fully supported on Windows, macOS, and Linux
  • Includes a JavaScript PDF Viewer to view and optionally edit PDFs on the client-side
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A C# .NET PDF document API library allowing developers to programmatically create and manipulate PDF documents at scale. Document Solutions for PDF (DsPdf) allows developers to import/export, create AcroForms (PDF Forms), and deploy PDFs across desktop and web applications.

Benefits of a C# .NET PDF API

Fast and Efficient

Save memory and time with the lightweight API architecture to generate and work with PDF documents in C# .NET effortlessly.

Comprehensive API for Adobe PDF

Generate, edit, and store feature-rich PDF documents without compromising design or features. This API conforms to Adobe PDF specification 2.0. Provides a client-side JavaScript PDF Viewer.

Feature-Rich API

Generate PDF forms with everything from signatures to security features. Or create PDF files with everything from text, images, audio and video. You can add, delete, copy and move pages, change page sizes, orientation, generate linearized PDFs, add annotations, redact content from PDF documents, and compress PDF files.

Complete Text Support

DsPdf includes text and paragraph formatting, special characters, multiple languages, RTL support, and vertical and rotated text for all supported platforms.

Full .NET Support for Windows, Linux, and MacOS

Develop for any .NET platform and major operating systems with a single code base. Use in your apps for .NET Core, .NET Framework, Mono, Xamarin.iOS, and Xamarin.Android.

Deploy Apps with PDFs to the Cloud

Cloud-based deployment means you can be everywhere. With NuGet and DsPdf, you can deploy to Azure, AWS, and AWS Lambda.

Linearize PDF documents using C# .NET PDF API

Linearize Existing C# PDF Documents

Linearize any existing PDF document and save the document in any 3 modes - Default, Linearize and Incremental Update (for signing existing signed documents)

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Delete or Replace text in C# .NET PDF documents

Delete or Replace Text in C# .NET PDF Documents

Update PDF documents by replacing or deleting text.

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Extract Data from PDF Documents using C# .NET

Extract Data from PDF Documents in .NET 6

Copy/Export table data or tagged content from PDFs using DsPdf and DsExcel .NET, an Excel API library.

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Redact Content from PDFs in C# .NET

Redact Content from PDFs in C# .NET

Mark and remove sensitive, confidential content from PDF documents with redact annotations. The marked content can be erased or masked with a rectangular or polygonal reaction area.

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Programmatically convert HTML to PDF using C# .NET PDF API

Convert HTML to PDF with No Dependencies

  • Render a URL or HTML string to PDF
  • No dependency on GPL/LGPL licensed software
  • Use the same browser instance to render multiple pages
  • Modify/replace the HTML page content
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View or Add Rich Media

View PDF files having embedded media content. Or create a PDF by adding audio and video files along with other content.

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Advanced Font and Language Support in the C# .NET PDF API

Advanced Font and Language Support

Dozens of fonts and options support various styles and multiple languages, including Arabic, Hebrew, Hindi, and Japanese.

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PDF Digital Signatures in C# .NET

PDF Digital Signatures in C# .NET

Implement signatures with image-based visual signatures, or digitally for document security and workflow management using X509 certificates. Use incremental updates to add multiple signatures to PDFs.

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Full PDF Annotations Support in C#

Full Annotations Support

Annotations are fully supported for PDF Spec 2.0, including adding, modifying extracting, and deleting annotations from documents.

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Work with PDF Fillable Forms in C#

Support for PDF-Based Fillable Forms

DsPdf simplifies PDF form creation and management. It enables users to add, modify, and delete various form fields like text, checkboxes, radio buttons, and signatures, making it easy to create interactive, fillable forms within your PDF documents. Additionally, DsPdf offers seamless import and export of form data for efficient data handling.

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Programmatically Work with PDF Layers using C# .NET PDF API

Programmatically Work with PDF Layers

Add, edit, and remove layers of PDF documents programmatically using C#. DsPdf allows users to create layers, associate content (such as content stream, FormXObject and annotation) with different layers and set their properties. Specific content sections can be selectively viewed or hidden.

Programmatically Create Tables with Complex Layouts using C# and VB.NET

Draw Complex Table Layouts on PDFs

Make use of new TableRenderer API to create tables with complex layout, merge cells, rotate text direction in cells and draw custom content in the cells.

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Work with Encrypted PDF Files without Specifying the Password

Edit and save an encrypted PDF by either adding new objects or read/write properties provided they are not based on PDF strings.

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Client-Side and Server-Side PDF Solution

JavaScript PDF Viewer

DsPdf comes with a Standard license for Document Solutions  JavaScript PDF Viewer (DsPdfViewer). Together they are a powerful PDF solution that provides robust functionality for both client-side and server-side PDF processing.

With DsPdf, users can easily create, modify, and manipulate PDF documents programmatically on the server-side using the .NET platform.

DsPdfViewer offers a feature-rich and customizable PDF viewer for client-side PDF viewing. The DsPdfViewer also offers a Professional license enabling features such as document editing, PDF form-filling, collaborative editing capabilities, and much more.

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Our Top C# .NET PDF API Features

Quick Start with C# .NET PDF API

Quick Start

This quick tutorial walks you through creating a simple "Hello, World!" app that uses DsPdf to generate and save a C# .NET PDF file.

PDF Document Properties

Document Properties

Make viewing faster with linearized PDFs. Documents properties include metadata, compression, and font embedding behavior. Restrict printing, copying, and PDF editing.

Print PDF using C# .NET

Print PDF Documents to Printer

Print PDF document directly to a printer on Windows platform.

VB.NET PDF API Font Support


Create, initialize, and use the Font Collection class to manage and use when rendering texts.

PDF Page Headers

Page Headers

Print page headers and footers in PDF documents. Organize pages by headings to help users get a sense of the page’s organization and structure.

Programmatically Merge PDFs using C# .NET

Merge Pages

Combine and organize multiple documents into one PDF–making it simple to share and send render pages of one PDF to another.

PDF Attachments


Attach photos, text, drawings, PDFs, and other file types (including AcroForm) to a PDF. If you move the PDF to a new location, the attachments move with it.

Render Text to a PDF using a C# .NET PDF API


Review the basics of rendering text in DsPdf (DrawString and DrawTextLayout), character formatting, paginated text, text trimming, word, character wraps, and much more.

Add Graphics to a PDF using C#


Use linear and radial gradient brushes.

Add Images to a PDF in C# .NET Apps


Generate pages of slides from all images in a directory and extract images from PDF documents.

Draw Complex Table Layouts on PDFs using C# .NET PDF API

Draw Complex Table Layouts

Use the new TableRenderer API to create tables with complex layouts, merge cells, rotate text direction in cells, and draw custom content in the cells.

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Automate PDF Report Generation with HTML Templates and a C# .NET PDF API

PDF Report Templates

Automate and customize documents and report generation. PDF Templates allow you to bind HTML templates to various data sources by using report templates that generate PDF files from HTML.

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PDF Annotation Support in C# .NET PDF API


Create, edit, or delete annotations from existing PDF documents. Several annotations are supported from PDF specifications.

Advance Text in PDFs

Advanced Text

Design magazine style, multi-column page layouts with balanced columns and outlines. Multi-language text is supported, including RTL, east-Asian languages, and vertical text.

Programmatically add Rich Media in PDFs using C# and a .NET PDF API

Rich Media

Create, edit or view PDF files having embedded media content either in audio or video format.

Create PDF Navigation Links in C# .NET Apps


Create text links to a URL and add outline entries. Link thumbnails to full-sized images, article threads, and destinations.

Convert HTML Files to PDF using a C# .NET PDF API


Convert HTML files or strings to PDF, or add HTML fragments to PDF documents along with other content.

Programmatically Create Tagged PDFs


Create tagged (structured) PDFs and attach them to individual paragraphs.

Extract PDF Data using a C# .NET PDF API


Load existing PDF into DsPdf and see how text, paragraphs, and tables can be inspected or extracted.

Apply PDF Redaction using C#


Completely remove content from PDF documents, including quadrilateral and polygonal redaction areas.


Create Fillable PDF Forms in C# .NET Apps

Form Fields

Create AcroForm fields include textbox, checkbox, radio button, combtext, combo box, list box, and buttons. Also, set field format for TextField, CombTextField, ComboBoxField.

Programmatically Work with PDF Layers

PDF Layers

Add, edit and remove layers programmatically. Associate PDF content (part of content stream, FormXObject, Annotation or PDF document) with a layer in PDF document.

Render Barcodes on PDFs using a C# .NET PDF API


Render samples of all barcode symbologies supported by the DsBarcode library.

Digitally Sign PDFs

Digital Signatures

Digitally sign PDFs, inspect signature properties, or remove existing signatures. Add Image signatures to PDF Documents.

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Programmatically Encrypt and Decrypt PDF Documents


Encrypt or decrypt PDF Documents. When a document is encrypted, its contents become unreadable. An authorized user can decrypt the document to obtain access to the contents. If a PDF document is password encrypted, the user must enter the password in order to view the document.

Generate ZUGFeRF Compliant PDFs using C#

ZUGFeRD Compliant

ZUGFeRD is a standard for electronic invoices in PDF/A format and based on the ISO standard. Create ZUGFeRD 1.x compliant invoices and read ZUGFeRD data from existing PDFs.

Programmatically Encrypt/Decrypt PDFs using C# .NET

Password-Protected PDF Files

Password-protected PDF files can be opened through the password input dialog or even without specifying the password.

JavaScript PDF Viewer

JavaScript PDF Viewer

Check out even more great features of Document Solutions PDF Viewer.

Linearize Existing PDF Documents

Linearize Existing PDF Documents

Linearize any existing PDF document and save the document in any 3 modes - Default, Linearize and Incremental Update (for signing existing signed document)

.NET PDF Text Search and Delete

Delete Text

Find and delete text from PDF documents using two options - Standard or PreserveSpace.

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.NET PDF Text Search and Replace

Replace Text

Find and replace text in PDF documents.


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Draw SVG on PDF Documents

Draw SVG on PDF Documents

Draw the SVG Image from file to PDF document using DsPdf.

Programmatically Convert PDFs to Images in C# .NET Apps

PDF to Images

Save a PDF as a multi-page TIFF, JPEG, PNG, GIF, or BMP image to save space and open easily.

Programmatically Read PDF Structure Tags

Read Structure Tags

Extract whole logical structure of the PDF document, parsed the tags, glean the data that needs to be extracted.


Visit Our C# .NET PDF API Samples

C# .NET PDF API Demo Explorer

Your full-fledged ASP.NET Core sample browser includes all major features, real-time PDFs, and use cases. These PDF files are generated using server-side code with DsPdf and loaded in the JavaScript client-side Document Solutions PDF Viewer. You can download individual .NET Core samples that can run as standalones in C# and VB.NET. The demos also include full sample code in C# and VB with comments along each step for quick onboarding.

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