In the modern digital ecosystem, the need to convert PDF documents to JPG images is more common than ever. Whether you’re looking to export PDF as JPEG, create document previews, or process PDF into image formats for web applications, automation can save valuable time.

In this guide, we are going to explore how we can develop a robust PDF to JPG image conversion application based on scalable REST API.

Why Convert PDF to JPG or JPEG?

  • Preview generation – Display PDF pages as images in web apps or content systems.
  • Easy sharing – JPG images are universally compatible across devices.
  • High fidelity – Preserve colors, layout, and vector graphics.
  • Automation-ready – Perfect for backend document processing.
  • Scalability – Convert multiple PDF files to JPG in bulk effortlessly.

PDF Conversion REST API

The GroupDocs.Conversion Cloud SDK for .NET provides a cloud-based solution to convert PDF to JPG, among many other formats. It supports dozens of document and image types, offering you an easy way to export PDF as JPEG or other file types directly from .NET applications.

Getting Started

Before we begin the conversion process, make sure you have:

  1. A GroupDocs Cloud account with Client ID and Client Secret.
  2. A sample PDF file to test conversion.
  3. A configured .NET environment (Visual Studio, Visual Studio Code, or other supported IDE).

Install the SDK via NuGet Package Manager:

Install-Package GroupDocs.Conversion-Cloud -Version 25.9.0

How to Convert PDF to JPG in C#

Follow these simple steps to convert PDF into image (JPG) format using the .NET REST API:

Step 1. - Create an instance of Configuration, ConvertApi & FileApi classes.

var configurations = new Configuration(clientId, clientSecret1);
var convertApi = new ConvertApi(configurations);
var fileApi = new FileApi(configuration);

Step 2. - Upload PDF File to Cloud Storage.

using (var fileStream = File.OpenRead("sample.pdf"))
{
    var uploadRequest = new UploadFileRequest("sample.pdf", fileStream);
    fileApi.UploadFile(uploadRequest);
}

Step 3. - Define ConvertSettings for PDF → JPG conversion.

var settings = new ConvertSettings
{
    FilePath = "input.pdf",
    Format = "jpg",
    OutputPath = "converted/pdf-to-jpg/"
};

Step 4. - Use ConvertDocument(...) method to initiate the PDF to JPG conversion.

var request = new ConvertDocumentRequest(settings);
convertApi.ConvertDocument(request);
  • Each page from the PDF document is converted into a separate JPG image, stored in the output folder.

Export PDF as JPEG using cURL

If you prefer a script-based approach, you can also convert PDF to JPG using GroupDocs.Conversion Cloud REST API and cURL.

Why Use cURL for PDF to JPG Conversion?

  • Ideal for automation pipelines or CI/CD integration.
  • No SDK installation required.
  • Perfect for headless or server environments.

First, generate your JWT access token while using client credentials and then, execute the following command to export PDF into JPEG image format:

curl -v "https://api.groupdocs.cloud/v2.0/conversion" \
-X POST \
-H "accept: application/json" \
-H "authorization: Bearer {ACCESS_TOKEN}" \
-H  "Content-Type: application/json" \
-d "{  \"FilePath\": \"{inputFile}\",  \"Format\": \"jpg\",  \"LoadOptions\": {    \"Format\": \"JPG\"  },\"OutputPath\": \"{resultantFile}\"}"

Replace {ACCESS_TOKEN} with JWT token, inputFile with name of PDF file, and resultantFile with name of resultant JPEG image to be generated in cloud storage.

Try JPG to PDF Online (Free App)

If you’d like to explore this functionality without coding, try our free PDF to JPG Converter web app. It allows you to export PDF as JPEG instantly in your browser, powered by the same GroupDocs.Conversion Cloud API.

pdf to jpg converter

Helpful Resources

Conclusion

In conclusion, converting PDF to JPG using GroupDocs.Conversion Cloud SDK for .NET provides an efficient and reliable solution for developers and businesses. Whether you’re building an automated document management system or looking to convert PDF files to JPG for easier sharing, archiving, or preview generation, this API makes the process seamless.

Frequently Asked Questions (FAQs)

Q. Can I convert multiple PDF files into images at once?

  • A. Yes. The API supports batch PDF to JPG conversion, allowing you to process multiple PDFs simultaneously.

Q. What is the quality of the converted JPG images?

  • A. The SDK ensures high-fidelity output, preserving text clarity, vector graphics, and color accuracy when exporting PDF into image format.

Q. Is additional software like Adobe Acrobat required?

  • A. No. The .NET REST API runs fully in the cloud—no local installation or third-party software is needed.

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