With this native C++ API, you can easily compare HTML documents and obtain the differences in the desired output format. Our C++ library is fully self-contained and does not rely on any external tools or services. It eliminates the need for external dependencies, providing a comprehensive set of HTML processing functionalities within a single C++ package.

On this landing page, we bring you a live demo of the HTML comparison in action, coupled with an illustrative C++ example. It compares the contents of HTML documents both at the character level and at the word level. Even if only a single character has been changed, the entire word will be marked as modified. Experience firsthand how easy it is to compare two documents by uploading HTML files to the interface, choosing the desired output format, and getting the differences between HTML documents marked with 100% accuracy.

Compare HTML using C++

Sometimes it may not be clear if a HTML file has been modified, and manually comparing two versions of a document can be a daunting task. Conversely, there are times when you're sure the HTML document has changed, but visually identifying the updated sections becomes overwhelming. The HTML comparison is an increasingly sought-after procedure, particularly within automated document workflows. Let's explore typical scenarios where automated HTML comparison can be highly valuable:

Version Control and Collaboration. When multiple contributors are working on the same HTML file, programmatic document comparison helps identify changes made by different individuals
Legal and Compliance. In the legal industry, accurate comparison of legal contracts, agreements, or regulatory documents is crucial. Automated HTML file comparison ensures precise detection of any modifications, additions, or omissions, helping legal professionals maintain compliance and mitigate legal risks
Quality Assurance and Testing. Software development often involves handling extensive documentation, such as requirements, specifications, and test cases. By automating HTML comparison, C++ developers can easily detect discrepancies between versions, ensuring consistency and accuracy throughout the development process
Content Management and Publishing. In content-driven industries, like publishing or journalism, maintaining consistency across different versions of articles, manuscripts, or books is essential. Comparing HTML documents programmatically allows authors and editors to quickly spot differences and ensure the integrity of their content, facilitating efficient publishing workflows

Find differences in HTML files in C++

As you can see, programmatic HTML comparison offers immense benefits in various domains, enabling streamlined workflows, enhanced collaboration, and increased productivity. With this C++ API, you have the power to harness these advantages seamlessly within your C++ projects. Try out our live demo by uploading two HTML documents, selecting the target format to highlight the differences, and examining the C++ code example. This C++ snippet demonstrates how to find differences between HTML files and save the results in the required format.

An important point: the compared HTML documents should not have revisions before calling the comparison method. You must first accept all the revisions.

Compare two HTML files using C++

Input files

Upload the compared file

Run code

Upload the second file to compare

Output format

Select the target format from the list

dotnet add package Aspose.Words.Cpp

Copy

using namespace Aspose::Words;

auto docA = MakeObject<Document>(u"Input1.html");
auto docB = MakeObject<Document>(u"Input2.html");

// There should be no revisions before comparison.
docA->AcceptAllRevisions();
docB->AcceptAllRevisions();

docA->Compare(docB, u"Author Name", time(0));
docA->Save(u"Output.html");

					Run code

You may freely copy this code and use it in any applicable purpose

How to compare two HTML in C++

Install Aspose.Words for C++
Add a library reference (import the library) to your C++ project
Load two HTML to compare
Accept all revisions before calling the Compare() method
Call the Compare() method to compare two HTML
Call the Save() method, passing an output filename with required extension
Get the result of compression HTML as a separate file

C++ library to compare HTML documents

There are three options to install Aspose.Words for C++ to your developer environment. Please choose one that resembles your needs and follow the step-by-step instructions:

Install a NuGet Package. See Documentation
Install the library using Package Manager Console within Visual Studio IDE
Install the library manually using Windows Installer

System Requirements

You can use this C++ library to develop software on Microsoft Windows, Linux and macOS operating systems:

GCC >= 6.3.0 and Clang >= 3.9.1 are required for Linux
Xcode >= 12.5.1, Clang and libc++ are required for macOS

If you develop software for Linux or macOS, please check information on additional library dependencies (fontconfig and mesa-glu open-source packages) in Product Documentation.

You can perform compare operation for other file formats: