The code to compress DOCX in JavaScript

High-performance Node.js library to optimize the size and content of DOCX files while maintaining their original quality

Develop DOCX processing software in Node.js using DOCX Optimization API. This powerful Node.js solution helps you optimize and reduce the size of DOCX files effortlessly. Test DOCX compressing capabilities online for free!

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Compress DOCX file in JavaScript

Make large DOCX files smaller without loss of quality. Delete unnecessary and unused data. Shrink the size of a DOCX file in code. The JavaScript library provides developers with an integrated API to optimize DOCX content.

Reduce the size of DOCX files using JavaScript

JavaScript library is a stand-alone solution and doesn't require any third party software installed.

Lossless compression and deep content optimization made easy with 'Aspose.Words for Node.js via .NET'. The following example demonstrates how to optimize the content of a DOCX file in JavaScript:

Code example in JavaScript to compress DOCX files
Upload a file you want to optimize/compress
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Select the target format from the list
npm install @aspose/words
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const aw = require('@aspose/words');

var doc = new aw.Document("Input.docx");
doc.cleanup();

var shapes = doc.getChildNodes(aw.NodeType.Shape, true)
for (var shape of shapes) {
    if (shape.hasImage()) {
        // It's up to developer to choose the library for image compression.
        const imageData = shape.getImageData().toStream();

        // ...
        // Compress image and set it back to the shape.
        shape.getImageData().setImage(compressedImageBuffer);
    }
}

var saveOptions = new aw.Saving.OoxmlSaveOptions()
saveOptions.compressionLevel = aw.Saving.CompressionLevel.Maximum

doc.save("Output.docx", saveOptions)
const aw = require('@aspose/words'); var doc = new aw.Document("Input.docx"); doc.cleanup(); var shapes = doc.getChildNodes(aw.NodeType.Shape, true) for (var shape of shapes) { if (shape.hasImage()) { // It's up to developer to choose the library for image compression. const imageData = shape.getImageData().toStream(); // ... // Compress image and set it back to the shape. shape.getImageData().setImage(compressedImageBuffer); } } var saveOptions = new aw.Saving.PdfSaveOptions() saveOptions.cacheBackgroundGraphics = true doc.save("Output.docx", saveOptions) const aw = require('@aspose/words'); var doc = new aw.Document("Input.docx"); doc.cleanup(); var shapes = doc.getChildNodes(aw.NodeType.Shape, true) for (var shape of shapes) { if (shape.hasImage()) { // It's up to developer to choose the library for image compression. const imageData = shape.getImageData().toStream(); // ... // Compress image and set it back to the shape. shape.getImageData().setImage(compressedImageBuffer); } } doc.save("Output.docx") const aw = require('@aspose/words'); var doc = new aw.Document("Input.docx"); doc.cleanup(); var shapes = doc.getChildNodes(aw.NodeType.Shape, true) for (var shape of shapes) { if (shape.hasImage()) { // It's up to developer to choose the library for image compression. const imageData = shape.getImageData().toStream(); // ... // Compress image and set it back to the shape. shape.getImageData().setImage(compressedImageBuffer); } } var saveOptions = new aw.Saving.OoxmlSaveOptions() saveOptions.compressionLevel = aw.Saving.CompressionLevel.Maximum doc.save("Output.docx", saveOptions) const aw = require('@aspose/words'); var doc = new aw.Document() var builder = new aw.DocumentBuilder(doc) shape = builder.insertImage("Input.docx") var saveOptions = new aw.Saving.ImageSaveOptions(aw.SaveFormat.Docx) shape.getShapeRenderer().save("Output.docx", saveOptions)
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How to compress DOCX in JavaScript

  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 DOCX file in JavaScript.
  4. Compress DOCX without losing quality.
  5. Call the Document.cleanup() method. The resulting code may vary depending on the output file format.
  6. Get the compressed result as a DOCX file.

JavaScript library to optimize and compress DOCX files

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 file format optimizations

You can optimize files in many other file formats:

5%

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