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Merge PNG Files using Node.js REST API

Combining multiple PNG images into a single file reduces the number of assets your application needs to manage. It allows developers to work with a unified PNG file, which improves usability and backend efficiency. In this step-by-step guide, we will explore how to merge PNG files in Node.js apps programmatically using the Node.js REST API. With this approach, there is no reliance on complex third-party graphics libraries or heavyweight frameworks. Let’s get started!

Steps to Merge PNG Files Using Node.js

  1. Import and set up GroupDocs.Merger Cloud Node.js SDK
  2. Obtain API credentials and initialize the DocumentApi with them
  3. Configure the source PNG files to merge from the cloud storage
  4. Define the PNG merging options with JoinOptions
  5. Create an PNG image joining request using JoinRequest
  6. Process the request to merge two PNG files using the join() method

Because the Cloud REST API is designed with developers in mind, it only takes a few simple steps and minimal JavaScript code to join PNG images in Node.js and simplify file handling. You can experience improved performance while using the Cloud API, as it optimizes storage and reduces load times when serving images in web or mobile apps. As a developer, you do not need to worry about OS-specific compatibility and can seamlessly create image-based reports, combine PNG image assets in your apps, or prepare consolidated files for archiving.

Code to Merge PNG Files Using Node.js

Merging PNG files in Node.js becomes straightforward and less resource-intensive with the GroupDocs.Merger Cloud Node.js SDK. Developers can add this capability to their cross-platform image merger applications effortlessly using the Node.js REST AI. Offering benefits such as reduced complexity, enhanced processing, and easier image management, adopting our cloud-based image manipulation solution gives your applications a professional edge while saving development time.

Explore more ways to handle file formats in Node.js by referring to our guide on Merging RTF Files Using Node.js REST API.

Updated on 21 Aug 2025