using IronPdf; // Disable local disk access or cross-origin requests Installation.EnableWebSecurity = true; // Instantiate Renderer var renderer = new ChromePdfRenderer(); // Create a PDF from a HTML string using C# var pdf = renderer.RenderHtmlAsPdf("<h1>Hello World</h1>"); // Export to a file or Stream pdf.SaveAs("output.pdf"); // Advanced Example with HTML Assets // Load external html assets: Images, CSS and JavaScript. // An optional BasePath 'C:\site\assets\' is set as the file location to load assets from var myAdvancedPdf = renderer.RenderHtmlAsPdf("<img src='icons/iron.png'>", @"C:\site\assets\"); myAdvancedPdf.SaveAs("html-with-assets.pdf");

using IronPdf; using System; // Step 1. Creating a PDF with editable forms from HTML using form and input tags // Radio Button and Checkbox can also be implemented with input type 'radio' and 'checkbox' const string formHtml = @" <html> <body> <h2>Editable PDF Form</h2> <form> First name: <br> <input type='text' name='firstname' value=''> <br> Last name: <br> <input type='text' name='lastname' value=''> <br> <br> <p>Please specify your gender:</p> <input type='radio' id='female' name='gender' value= 'Female'> <label for='female'>Female</label> <br> <br> <input type='radio' id='male' name='gender' value='Male'> <label for='male'>Male</label> <br> <br> <input type='radio' id='non-binary/other' name='gender' value='Non-Binary / Other'> <label for='non-binary/other'>Non-Binary / Other</label> <br> <p>Please select all medical conditions that apply:</p> <input type='checkbox' id='condition1' name='Hypertension' value='Hypertension'> <label for='condition1'> Hypertension</label><br> <input type='checkbox' id='condition2' name='Heart Disease' value='Heart Disease'> <label for='condition2'> Heart Disease</label><br> <input type='checkbox' id='condition3' name='Stoke' value='Stoke'> <label for='condition3'> Stoke</label><br> <input type='checkbox' id='condition4' name='Diabetes' value='Diabetes'> <label for='condition4'> Diabetes</label><br> <input type='checkbox' id='condition5' name='Kidney Disease' value='Kidney Disease'> <label for='condition5'> Kidney Disease</label><br> </form> </body> </html>"; // Instantiate Renderer var renderer = new ChromePdfRenderer(); renderer.RenderingOptions.CreatePdfFormsFromHtml = true; renderer.RenderHtmlAsPdf(formHtml).SaveAs("BasicForm.pdf"); // Step 2. Reading and Writing PDF form values. var FormDocument = PdfDocument.FromFile("BasicForm.pdf"); // Set and Read the value of the "firstname" field var FirstNameField = FormDocument.Form.FindFormField("firstname"); FirstNameField.Value = "Minnie"; Console.WriteLine("FirstNameField value: {0}", FirstNameField.Value); // Set and Read the value of the "lastname" field var LastNameField = FormDocument.Form.FindFormField("lastname"); LastNameField.Value = "Mouse"; Console.WriteLine("LastNameField value: {0}", LastNameField.Value); FormDocument.SaveAs("FilledForm.pdf");

Published September 13, 2023

How to Convert PDF to PNG in .NET

In the dynamic landscape of today's technology-driven world, the imperative to effortlessly transform PDF files into diverse image file formats has emerged as a fundamental necessity across myriad applications. Whether the objective is archival preservation, seamless sharing, or enhancing visual aesthetics, the demand to convert PDFs into images has undergone remarkable expansion.

Within the confines of this article, we undertake an in-depth exploration of the intricacies involved in the conversion process, specifically focusing on the conversion of PDF files into PNG image format by harnessing the robust capabilities inherent to the .NET framework. The insights shared herein not only illuminate the mechanics of this conversion but also furnish developers with a multifaceted and potent resolution to cater to these evolving needs effectively and efficiently.

Why Convert PDF to PNG?

The rationale behind converting PDF files into PNG format is grounded in the unique advantages that PNG (Portable Network Graphics) images offer. PNG is renowned for its lossless compression, enabling images to be compressed without compromising quality. Additionally, PNG supports transparent backgrounds, making it an ideal format for retaining intricate visual details while accommodating diverse design elements.

By converting PDFs to PNG, one can ensure that document formatting, full image resolution and fidelity, and intricate graphical components are preserved, making PNG an invaluable choice for applications requiring visual precision and versatility.

In this article, we will use IronPDF to convert PDF to PNG images programmatically.

How to Convert PDF to PNG using .NET

Download and install the .NET PDF to PNG library.
Convert PDF files to PNG images.
Open an existing PDF document from the system using the "PdfDocument.FromFile()" method.
Convert the PDF to images using the "RasterizeToImageFiles" method.
Pass the output folder and image format as parameters to the method mentioned above.

1. IronPDF

IronPDF is a .NET library that allows developers to create, manipulate, and render PDF documents in .NET applications. It provides a wide range of features for working with PDF files, including creating PDF documents from scratch, converting document pages from HTML to PDF, merging multiple PDFs, adding text and images, extracting text and images from PDFs, and more. IronPDF is particularly useful when working with web applications or any .NET project that requires PDF generation or manipulation capabilities.

It provides an easy-to-use API that allows developers to perform complex PDF tasks without requiring in-depth knowledge of the PDF file format. It's important to note that the information provided here is based on my knowledge up to September 2021, and there may have been updates or changes to IronPDF since then. If you're interested in using IronPDF, I recommend checking the official website or documentation for the most up-to-date information and features.

2. Setting up the Environment and installing IronPDF

It is essential to create an ideal environment before beginning the process of PDF transformation with IronPDF. Installing a suitable version of the .NET framework should be your first step. Once your framework is prepared, start IronPDF installation. Employing NuGet, a well-liked package management for .NET projects, makes this task simple.

2.1. Create a New VB .NET Project

Open Visual Studio and follow these steps to create a new .NET project:
- Click on "File" > "New" > "Project..."
- Choose a project template based on your application type (e.g., Windows Forms, Console Application, ASP.NET, etc.) and click on next.
- Enter a name and location for your project and click on the next button.
- Select the target framework and Click "Create" to create the project.
Install IronPDF:
After creating the project, you'll need to install the IronPDF library using NuGet. Here's how:
- Right-click on your project in the Solution Explorer.
- Select "Manage NuGet Packages..."
- In the "NuGet Package Manager" window, make sure "Browse" is selected on the left.
- In the search box, type "IronPDF."
- Select the "IronPDF" package from the search results.
- Click the "Install" button to install the package.

3. Convert PDF Files to PNG images

The process of converting PDF documents into PNG images is made remarkably straightforward through the utilization of the IronPDF .NET library. Within this segment, we will delve into the streamlined methodology that enables you to seamlessly transform PDFs into PNG images with a mere handful of concise code lines. By harnessing the capabilities of IronPDF, this process becomes an efficient and accessible endeavor. Let's navigate through the steps that empower you to achieve this conversion effortlessly.

3.1. Input PDF files

How to Convert PDF to PNG in .NET: Figure 6 - A three-page PDF document with a variety of graphs and charts.

using IronPdf;
var pdf = PdfDocument.FromFile("bucket.pdf");
pdf.RasterizeToImageFiles(@"C:\image\folder\*.png");

using IronPdf;
var pdf = PdfDocument.FromFile("bucket.pdf");
pdf.RasterizeToImageFiles(@"C:\image\folder\*.png");

Imports IronPdf
Private pdf = PdfDocument.FromFile("bucket.pdf")
pdf.RasterizeToImageFiles("C:\image\folder\*.png")

VB C#

The following code sample snippet utilizes the IronPDF library within a .NET application to perform the conversion of all the pages of a PDF document into a sequence of PNG image files. It commences by loading the designated PDF file named "bucket.pdf". Subsequently, it proceeds to iterate through each page of the PDF document, rasterizing each page and transforming it into an individual PNG image. These resulting images are then stored in a predetermined directory path, with filenames produced automatically according to the content of the original PDF. This process effectively achieves the conversion of the whole PDF document into a series of PNG images.

3.2. Output Images

How to Convert PDF to PNG in .NET: Figure 7 - Three PNG pictures in the Windows file explorer, one for each of the PDF pages.

4. Conclusion

The ability to convert PDF pages to PNG images using the .NET framework, specifically leveraging the power of IronPDF, offers a versatile and effective solution for addressing the growing demand for seamless document transformation in today's technology-driven landscape. The unique advantages of PNG format, including lossless compression and support for transparent backgrounds, make it an invaluable choice for preserving document formatting, image fidelity, and intricate graphical elements.

IronPDF capabilities empower developers to easily integrate the PDF page to PNG conversion functionality into their applications, demonstrating the framework's significance in enhancing visual precision and versatility across various domains. As technology continues to evolve, such tools provide crucial support for meeting the ever-expanding requirements of modern applications.

Make sure to check out this PDF-to-PNG conversion tutorial, and for more related code examples, visit the IronPDF website.