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GroupDocs.Comparison for Node.js via Java Downloads

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Powerful document comparison API for Node.js (powered by Java) to diff 50+ document and image formats, including Microsoft Office and OpenDocument types, PDF documents, and common raster images (TIFF, JPEG, GIF, PNG, BMP). Retrieve changes in a convenient format with line-by-line comparison of content, paragraphs, characters, styles, shapes, and positions.

Quick links

Key Features

Compare files or folders and detect differences in similar documents.
Visually represent, list, approve, or reject changes.
Popular document formats such as PDF, DOCX, PPTX, and XLSX are supported.

Supported Formats

Microsoft Office Formats

Microsoft Word: DOC, DOCM, DOCX, DOT, DOTM, DOTX, RTF
Microsoft Excel: XLS, XLT, XLSX, XLTM, XLSB, XLSM
Microsoft PowerPoint: POT, POTX, PPS, PPSX, PPTX, PPT
Microsoft OneNote: ONE
Microsoft Visio: VSDX, VSD, VSS, VST, VDX

Other Supported Formats

OpenDocument: ODT, ODP, OTP, ODS, OTT
Portable: PDF
AutoCAD: DWG, DXF
Email: EML, EMLX, MSG
Images: BMP, GIF, JPG, JPEG, PNG, DICOM
Web: HTM, HTML, MHT, MHTML
Text: TXT, CSV
eBook: MOBI, DJVU

See the full list of supported formats.

Getting Started

Prerequisites

Node.js (LTS recommended)
Java Runtime Environment (JRE) 8 or later
Windows, Linux, or macOS

Installation

To install the package, check the System Requirements and Installation documentation topics for platform-specific instructions.

Use cases

Here are some typical use cases:

Compare files

This example shows how to compare two DOCX files and save a diff file.

'use strict';

const groupdocs = require('@groupdocs/groupdocs.comparison');

// Apply license, required for non-evaluation usage
const license = new groupdocs.License();
license.setLicense("GroupDocs.Comparison.lic");

// Compare documents
const comparer = new groupdocs.Comparer("proposal_v1.docx");
comparer.add("proposal_v2.docx");
comparer.compare("proposal_diff.docx");

// Exit
process.exit(0);

The output proposal_diff.docx file shows changes made in the second version of the file and lists all the changes on an additional summary page.

Get changes

'use strict';

const groupdocs = require('@groupdocs/groupdocs.comparison');

// Apply license, required for non-evaluation usage
const license = new groupdocs.License();
license.setLicense("GroupDocs.Comparison.lic");

// Compare documents
const comparer = new groupdocs.Comparer("proposal_v1.docx");
comparer.add("proposal_v2.docx");
comparer.compare();

// Print out changes
const changes = comparer.getChanges();
for (let index = 0; index < changes.length; index++) {
  const change = changes[index];
  
  const page = change.getPageInfo().getPageNumber();
  const type = change.getType().name();
  const text = (change.getText() || "").trim();
  const src = (change.getSourceText() || "").trim();
  const tgt = (change.getTargetText() || "").trim();
  
  console.log(`[Page ${page}] ${type} "${text}", "${src}" -> "${tgt}"`);
}

// Exit
process.exit(0);

This code example compares two DOCX files and outputs details on changes, such as page, change type, source, and changed text. See the expected console output:

[Page 3] INSERTED "7", "$12 per user/month" -> "$7 per user/month"
[Page 3] DELETED "12", "$12 per user/month" -> "$7 per user/month"
[Page 3] DELETED "5", "$25 per user/month" -> "$20 per user/month"
[Page 3] INSERTED "0", "$25 per user/month" -> "$20 per user/month"

Accept or reject changes

This code example shows how to accept or reject changes between two versions of the same document.

'use strict';

const java = require('java');

const groupdocs = require('@groupdocs/groupdocs.comparison');

// Apply license, required for non-evaluation usage
const license = new groupdocs.License()
license.setLicense("GroupDocs.Comparison.lic");

// Compare documents
const comparer = new groupdocs.Comparer("proposal_v1.docx");
comparer.add("proposal_v2.docx");
comparer.compare();

// Accept all chanes
const changes = comparer.getChanges();
for (let index = 0; index < changes.length; index++) {
  const change = changes[index];
  change.setComparisonAction(groupdocs.ComparisonAction.ACCEPT); // or REJECT
}

// Apply changes and save result
const changeArray = java.newArray('com.groupdocs.comparison.result.ChangeInfo', changes);
const saveOptions = new groupdocs.ApplyChangeOptions(changeArray);
comparer.applyChanges("proposal_accepted_changes.docx", saveOptions);

// Exit
process.exit(0);

This example accepts all the changes and saves the output file with all changes accepted.

GroupDocs.Comparison GroupDocs.Total Conholdate Conholdate.Total Document-Automation Compare-Documents Compare-Files Document-Comparer File-Comparison-API PDF-Comparer Word-Comparison-Library Excel-Comparison-Library PowerPoint-Comparison-API Image-Comparer HTML-Comparer

Direct Download

GroupDocs.Comparison for Node.js via Java 25.11

Download the offline package `groupdocs-groupdocs.comparison-25.11.0.tgz`. This .tgz package contains the same build that is available on NPM and can be installed locally in environments without internet access.

Added: 20/11/2025 Downloads: