Code to edit PDF in C#

Advanced PDF Editor for .NET. Use it to modify PDF documents programmatically

This is a comprehensive PDF Editing and Manipulation Library for C#, F#, VB.NET. Use our PDF editing API to develop cross-platform software for .NET Framework, .NET Core.

Edit text in PDF using C#

Programmatic modification of PDF documents is an integral part of modern digital workflow. Edit text in PDF, insert graphs using external data, modify tables.

C# library is a stand-alone solution to edit PDF that doesn't rely on other software. It's ready for commercial use covers all possible needs of professional C# developers:

  • Modify existing PDF elements: tables, lists, charts, images, links, fields, etc.
  • Modify PDF styles and formatting attributes
  • Add new PDF elements
  • Search PDF for text patterns and replace them with new text
  • Save the result to a variety of file formats using 'Document.Save' method
  • Remove unwanted PDF elements (paragraphs, pages, sections, chapters)

Change PDF in C#

C# PDF programmatic editor provides developers with a modern API to edit PDF programmatically. Quickly integrate PDF modification features into your software. Our library supports the modification of a variety of document formats in C#.

The task of editing PDF programmatically in C# is the task of modifying elements in the PDF document tree. It is also known as the 'DOM' - the programming model for interacting with PDF document elements and their properties.

Edit PDF in C#

PDF modification features are inseparable from the advanced PDF search functionality. For a hig level of flexibility, our C# library provides developers with PDF Regex-based search functionality. This approach expands the possibilities to edit text in PDF files, allowing the use of templates for dynamic PDF transformation.

Edit table in PDF using C#

One of the most requested features is the dynamic creation and modification of tables in PDF documents. Working with tables is very convenient with C# library: edit tables, update tables and extract table text using C#.

The following example demostrates how to modify a PDF document in C#:

Example in C# to edit PDF files
Input file
Upload a document you want to modify
Run code
using Aspose.Words;

var doc = new Document("Input.pdf");
var builder = new DocumentBuilder(doc);

// Insert text at the beginning of the document.
builder.MoveToDocumentStart();
builder.Write("Morbi enim nunc faucibus a.");
doc.UpdatePageLayout();

doc.Save("Output.pdf");
using Aspose.Words;

var doc = new Document("Input.pdf");
var builder = new DocumentBuilder(doc);

// Insert table at the beginning of the document.
builder.MoveToDocumentStart();
builder.StartTable();
builder.InsertCell();
builder.Write("Row 1, cell 1.");
builder.InsertCell();
builder.Write("Row 1, cell 2.");
builder.EndTable();
doc.UpdatePageLayout();

doc.Save("Output.pdf");
using Aspose.Words;

var doc = new Document("Input.pdf");
var builder = new DocumentBuilder(doc);

// Insert image at the beginning of the document.
builder.MoveToDocumentStart();
builder.InsertImage("Image.png");
doc.UpdatePageLayout();

doc.Save("Output.pdf");
Run code

How to edit PDF

  1. Install PDF Editor for C#.
  2. Add a library reference (import the library) to your C# project.
  3. Open a PDF in C#.
  4. Insert content at the beginning of the PDF document.
  5. Call the 'Save()' method, passing the name of the output file with the required extension.
  6. Get the edited result.

C# library to work with PDF files

There are three alternative options to install "Aspose.Words for .NET" onto your system. Please choose one that resembles your needs and follow the step-by-step instructions:

System Requirements

Our product is fully cross-platform and supports all major .NET implementations following '.NET Standard 2.0' specification:

  • Microsoft .NET Framework, starting from the earliest 2.0 version, and ending with the latest '.NET Framework 4.8'
  • .NET Core, starting from the earliest 2.0, and ending with the latest '.NET 6'
  • Mono >= 2.6.7

As far as .NET code doesn't depend on the underlying hardware or operating system, but only on a Virtual Machine, you are free to develop any kind of software for Windows, macOS, Android, iOS and Linux. Just make sure you have installed the corresponding version of .NET Framework, .NET Core, Windows Azure, Mono or Xamarin.

We recommend using Microsoft Visual Studio, Xamarin, and MonoDevelop integrated development environments to create C#, F#, VB.NET applications.

Fore more details please refer to Product Documentation.

Other supported file formats

You can edit files in many other file formats:

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