How to convert PDF File to PNG and PNG to PDF Format using Java

Convert PDF File to PNG and PNG to PDF Format using Java

If you’ve been wondering how to make PDF into PNG or vice versa, then I am here to tell you that it’s incredibly easy and simple to do that. PDF (Portable Document Format) is one of the most popular file formats to protect and secure documents online. PNG is a compressed image file format that contains more details for high-resolution images like logos. There can be many reasons why you prefer to convert an image or photo into a document or JPG to PDF with original quality. For example, for securing data or reducing the size of image files for transporting over the internet. Therefore, this article covers how to convert PDF File to PNG and PNG to PDF Format using Java.

In this article, we will discuss the following points/topics:

Java Convert PDF to PNG and PNG to PDF using REST API – Installation

For converting PDF to PNG and PNG to PDF in Java, I will be using the Java SDK of GroupDocs.Conversion Cloud API. Install this rich-featured Java library to convert PDF files to image formats such as PNG. It offers a wide range of files format conversion methods that can also be converted back and forth. Further, this document-processing Java library is very quick and easy to install in your Java project.

You can either download the jar files or follow the following Maven configurations.

Maven Repository:

<repository>
    <id>groupdocs-artifact-repository</id>
    <name>GroupDocs Artifact Repository</name>
    <url>https://repository.groupdocs.cloud/repo</url>
</repository>

Maven Dependency:

<dependency>
    <groupId>com.groupdocs</groupId
    <artifactId>groupdocs-conversion-cloud</artifactId>
    <version>23.4</version>
    <scope>compile</scope>
</dependency>

Please collect Client ID and Secret from the dashboard before following the mentioned steps. Once you have your ID and secret, add the code snippet to a Java-based application:

How to Convert PDF to PNG Format in Java using REST API

Once the installation process is completed, you can jump to the code snippet that changes PDF file to PNG format programmatically. Follow the below-mentioned steps:

Upload the File

Firstly, upload the PDF file to the cloud using the code snippet given below:

As a result, the uploaded PDF file will be available in the files section of your dashboard on the cloud.

Convert PDF File to PNG Image in Java

The Java SDK is an extremely powerful library that performs optimized file conversion in a matter of seconds. Please follow the following steps and the code snippet as mentioned below to convert PDF to PNG file programmatically in Java:

  • Firstly, create an instance of ConvertApi
  • Secondly, create ConvertSettings instance
  • Set the storage name and input the PDF file path
  • Now, provide the output file format as “png”
  • Then, set the output file path
  • Create ConvertDocumentRequest with convert settings as a parameter
  • Lastly, invoke the ConvertApi.convertDocument() to convert the file in PNG format

The following code example shows how to convert PDF file to PNG file format in Java using REST API:

Download the Converted File

The above code sample will save the converted PDF to PNG file on the cloud. You can download it using the following code sample:

Convert PDF to PNG Images in Java using Advanced Settings

Generally, an image with higher resolution and quality is more clear. You can customize the image resolution while following the steps and the code snippet given below to convert PDF to PNG image in Java programmatically:

  • Initialize an instance of ConvertApi
  • Create an object of ConvertSettings
  • Set the storage name and input the PDF file path
  • Next, set “png” as the output file format
  • Create an object of PngConvertOptions class to specify additional options.
  • Set various convertOptions like setFromPage, setPagesCount, etc. to convert pages of a document.
  • Now set convertOptions and output file path
  • Create ConvertDocumentRequest with convert settings as a parameter
  • Finally, Invoke the ConvertApi.convertDocument() to save the document in PNG format

The following code example shows how to convert PDF to PNG file format in Java using REST API:

How to Convert PNG File to PDF in Java using REST API

Please follow the steps mentioned below to convert PNG file to PDF programmatically:

  • Firstly, create an instance of ConvertApi class
  • then, create ConvertSettings class instance
  • Set the storage name and input PNG file path
  • Now, provide the output file format as “pdf”
  • Then, set the output file path
  • Create ConvertDocumentRequest with convert settings as a parameter
  • Finally, invoke conversion using the ConvertApi.convertDocument() method

The following code example shows how to convert PNG file to PDF in Java using REST API:

Finally, the above code sample will save the PNG file on the cloud. Follow the already described steps to upload the file and then download the converted file on the cloud storage.

Free PDF to PNG Converter Online

What is PDF to PNG converter online? Please try the following free online PDF to PNG converter, which is developed using Groupdocs.Conversion Cloud APIs.

Online PNG to PDF Converter Free

How to convert PNG to PDF file for free? Please try the following free online PNG to PDF converter, which has been developed using Groupdocs.Conversion Cloud APIs.

Summing up

We are ending this blog post here. In this article, we have covered:

  • how to transform PDF to PNG programmatically in java;
  • programmatically upload the PDF and download the converted file from the cloud;
  • how to convert PDF to PNG in java using advanced settings;
  • how to change PNG to PDF in java programmatically;

To explore more about the Java Conversion API, you may navigate to the documentation, or available examples on GitHub. We also provide an API Reference section that helps you visualize and interact with our online API directly through the web browser.

Further, groupdocs.cloud is writing other blog posts on new topics. Therefore, please stay in touch for the latest updates.

Ask a question

You can let us know about your questions and queries on our forum.

FAQs

How do I convert PDF to PNG in Java?

Please visit this link to learn about the Java code snippet on how to turn PDF into PNG file quickly and easily.

How to convert PDF to PNG file using REST API?

Create an instance of ConvertApi, set the values of the convert settings, and invoke the convertDocument method with ConvertDocumentRequest for converting PDF to a PNG file.

How to convert PDF into PNG free online?

PDF to PNG converter free online allows you to convert PDF to PNG format, quickly and easily. Once the conversion is completed, you can download the PNG file.

How do I convert PDF file to PNG online free?

  • Open online PDF to PNG converter free
  • Click inside the file drop area to upload the PDF sheet or drag & drop PDF file.
  • Click on Convert Now button, and online PDF to PNG converter software will convert PDF file into PNG.
  • The download link of the output file will be available instantly after converting the PDF to a PNG file.

How to install PDF to PNG format converter free download library?

Install PDF to PNG converter free download Java library to create, and convert PDF to PNG programmatically.

How do I convert PDF to PNG offline in windows?

Please visit this link to download PDF to PNG converter software free for windows. This online PDF to PNG converter free download software can be used to turn PDF into PNG in windows quickly, with a single click.

How do I convert PNG to PDF in Java?

Please follow this link to learn the Java code snippet for how to transform PNG into PDF files quickly and easily.

How to convert PNG to PDF file using REST API?

Create an instance of ConvertApi, set the values of the convert settings, and invoke the convertDocument method with ConvertDocumentRequest for converting PNG to PDF file.

How to convert PNG into PDF free online?

PNG to PDF converter free online allows you to export PNG to PDF format, quickly and easily. Once the conversion is completed, you can download the PNG file.

How do I convert PNG to PDF file online free?

  • Open online PNG to PDF converter free
  • Click inside the file drop area to upload PNG or drag & drop a PNG file.
  • Click on Convert Now button, online PNG to PDF converter app will transform PNG to PDF.
  • Download link of the output file will be available instantly after converting data from PNG to PDF file.

How to install PNG to PDF format converter free download library?

Install PNG to PDF converter free download Java library to create, and convert PNG to PDF programmatically.

How do I convert PNG to PDF offline in windows?

Please visit this link to download PNG to PDF converter software free for windows. This online PNG to PDF converter free download software can be used to turn PNG to PDF in windows quickly, with a single click.

See Also

We recommend visiting the following articles for further information: