Convert multiple image to PNG in JavaScript

High-speed Node.js library for merging image files into PNG

Fast and efficient Node.js library to combine multiple image files into PNG. Try it online for free!

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Convert image to PNG in JavaScript

Modern JavaScript library allows Node.js via .NET developers to convert image to PNG image format with a few lines of code. image conversion engine analyses the original content, and exports the combined result as one PNG image.

Use JavaScript to convert image to PNG image format with maximum flexibility and speed. Run online live demo and check the highest output PNG image quality right in a browser. image Conversion API supports a bunch of useful options.

Merge image into one PNG image in JavaScript

To convert image files to PNG image just use JavaScript library that handles all low-level details.

Convert multiple image and save the result as a single PNG image. If you develop code in JavaScript, image format conversion will be simpler than it sounds. See JavaScript example that iterates through source image files and combines them into one PNG image:

Code example in JavaScript to combine multiple PNG to PNG
Upload a file you want to merge
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Upload a file you want to merge
Select the target format from the list
npm install @aspose/words
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const aw = require('@aspose/words');

var fileNames = [ "Input1.png", "Input2.png" ]

var doc = new aw.Document()
var builder = new aw.DocumentBuilder(doc)

shapes = fileNames.map(fileName => builder.insertImage(fileName))

// Calculate the maximum width and height and update page settings 
// to crop the document to fit the size of the pictures.
pageSetup = builder.pageSetup
pageSetup.pageWidth = Math.max(...shapes.map(shape => shape.width));
pageSetup.pageHeight = shapes.reduce((sum, shape) => sum + shape.height, 0);
pageSetup.topMargin = 0
pageSetup.leftMargin = 0
pageSetup.bottomMargin = 0
pageSetup.rightMargin = 0

doc.save("Output.png")
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How to convert several image into PNG

  1. Install Aspose.Words for Node.js via .NET.
  2. Add a library reference (import the library) to your JavaScript project.
  3. Open the source image file in JavaScript.
  4. Convert several image files into PNG in a few seconds.
  5. Call the appendDocument() method, passing an output filename with PNG extension.
  6. Get the result of conversion image into PNG.

JavaScript library to convert several image into PNG

We host our Node.js via .Net packages in NPM repositories. Please follow the step-by-step instructions on how to install "Aspose.Words for Node.js via .NET" to your developer environment.

System Requirements

This package is compatible with Node.js 14.17.0 or higher.

Other Supported image Merge operations

You can merge image to many other file formats:

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