Find Answers by API

Convert PNG to PDF using Java REST API

PDF PNG conversion can be performed effortlessly with the Aspose.PDF Cloud Java SDK. This guide shows you how to transform a PNG image (or a collection of images) into a searchable PDF document by leveraging the Java RESTful service, complete with code snippets and step‑by‑step instructions. For format details, see the official pages for PDF and PNG.

Prerequisite

Steps to Convert PNG File to PDF using Java REST Interface

  1. Create an instance of the PdfApi class to access conversion operations.
  2. Define the input image file name(s) and the desired output PDF file name.
  3. Read the image(s) into a memory stream and upload them to Aspose Cloud storage.
  4. Build an image template that describes how the uploaded image(s) should be handled.
  5. Add as many images as needed to the template’s collection.
  6. Create a conversion request, supplying the image list and the OCR flag.
  7. Invoke the PutImageInStorageToPdf() method to perform the conversion.
  8. Inspect the API response; if successful, download the resulting PDF file.

These steps outline the complete workflow for converting a PNG to a PDF using Java REST API: instantiate PdfApi, specify source and destination names, upload the image(s), configure the template, send the conversion request, and finally retrieve the generated PDF.

Code to Change a PNG to a PDF using Java‑based API

The sample demonstrates how to convert a PNG to PDF with the Java Low‑Code API. When multiple images are supplied, each image becomes a separate page in the output PDF. Setting IsOCR to true makes the resulting PDF searchable and selectable.

For adding images to an existing PDF, refer to the article Attach image to PDF using Java REST API.

Keywords: png to pdf using Java Low Code API; convert png to pdf using Java REST API; transform png to pdf using Java RESTful Service; change a png to a pdf using Java-based API.