PDF remains the most preferred format for document sharing and archiving due to its consistency and security. Converting JPG to PDF ensures your images are preserved, easily shared, and formatted for professional use.

Key Benefits of JPG to PDF Conversion:

  • Maintain image quality and layout fidelity.
  • Secure files for distribution or long-term storage.
  • Combine multiple images into a single document.
  • Automate the conversion process with .NET REST API.

JPG to PDF Conversion API

In this article, we are focused on utilizing the amazing capabilities of GroupDocs.Conversion Cloud SDK for .NET for JPEG to PDF conversion. It’s a feature-rich API designed to simplify the process of converting various document and image formats. Therefore, with just a few lines of C# code, you can efficiently transform your JPG or JPEG files into professional-quality PDFs.

Getting Started

Before you begin, make sure you have the following:

  1. An account over GroupDocs Cloud dashboard to obtain API credentials.
  2. A sample JPG or JPEG image for testing.
  3. A working .NET environment (Visual Studio, Visual Studio Code, or other supported IDE).

Now, in order to use the SDK, we need to install it in our solution. Please execute the following command in your NuGet Package Manager Console:

Install-Package GroupDocs.Conversion-Cloud -Version 25.9.0

Convert JPEG to PDF using C#

Let’s delve into the details on converting JPG images to PDF format using simple and easy C# code snippet.

Step 1. - Create Configuration & ConvertApi object by using client credentials.

var configurations = new Configuration(clientId, clientSecret1);
var apiInstance = new ConvertApi(configurations);

Step 2. - Upload the input JPEG image to cloud storage.

fileUpload.UploadFile(new UploadFileRequest("source.jpg", stream));

Step 3. - Create instance of ConvertSettings where we define the resultant format as PDF.

var settings = new ConvertSettings{...}

Step 4. - Use ConvertDocument(...) to perform the JPEG to PDF conversion.

var response = apiInstance.ConvertDocument(new ConvertDocumentRequest(settings));

Save JPG as PDF using cURL

If you prefer a lightweight, scriptable solution without writing full C# code, you can also use cURL commands with GroupDocs.Conversion Cloud API. This approach is perfect for automation, CI/CD pipelines, or quick testing.

Why Use cURL for JPG to PDF Conversion?

  • No SDK installation required.
  • Easily integrates with automation scripts.
  • Ideal for server-side and command-line workflows.

The prerequisite for this approach is to generate a JWT access token based on client credentials. Once we have obtained the token, please execute the following command to save JPG as PDF 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 "{  \"StorageName\": \"internal\",  \"FilePath\": \"{inputFile}\",  \"Format\": \"pdf\",  \"resultantPath\": \"{myResultant}\"}"

Replace {ACCESS_TOKEN} with your generated token, inputFile with your JPG image, and myResultant with name of resultant PDF file to be generated in cloud storage.

Save Resultant PDF on local Drive

If you prefer saving the resultant PDF on a local drive, then try using the following command:

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 "{  \"StorageName\": \"internal\",  \"FilePath\": \"inputFile\",  \"Format\": \"pdf\"}" \
-o "Resultant.pdf"

Try JPG to PDF Online (Free App)

If you’d like to experience GroupDocs.Conversion Cloud without writing any code, try our free online JPG to PDF Converter. This web app is built on top of the same REST API and allows you to instantly convert JPG or JPEG images to PDF in your browser.

jpg to pdf online

Helpful Resources

Concluding Remarks

We have learned that the conversion of JPG or JPEG images to PDF using GroupDocs.Conversion Cloud SDK for .NET is a fast, secure, and scalable solution. Whether you’re building a document automation system, archiving visual data, or integrating file conversion into enterprise workflows, this SDK empowers you to achieve reliable results with minimal code.

Frequently Asked Questions (FAQs)

  1. Do I need to install any additional software to perform JPG to PDF conversion?

No. You don’t need any external software, and the API has no dependency on local applications like Adobe Acrobat or Microsoft Office.

  1. Can I convert multiple JPG images into a single PDF document?

Yes. The API supports batch JPG to PDF conversion, allowing you to combine multiple JPG or JPEG images into one consolidated PDF. Simply specify multiple file paths in the conversion settings to accomplish this task.

  1. Is the image quality preserved after conversion?

Absolutely. The GroupDocs.Conversion Cloud maintains high image fidelity during the JPG to PDF conversion process, ensuring that your output PDF retains the original quality, color depth, and resolution of your images.

  1. What output formats are supported besides PDF?

GroupDocs.Conversion Cloud supports a wide range of output formats, including DOCX, HTML, XLSX, PPTX, and PNG, giving developers the flexibility to convert images and documents into multiple formats as per their needs.

We highly recommend visiting the following articles to learn more about: