How to optimize HTML?

Open the site: HTML . Drag and drop HTML files to optimize and compress them online. Or just use a code sample in C#. Install Aspose.Words for .NET. Add a library reference (import the library) to your C# project. Open the source HTML file in C#. Compress HTML without losing quality. Call the Document.Cleanup() method. The resulting code may vary depending on the output file format. Get the compressed result as a HTML file.

Why compress HTML files in C#?

Compressing HTML allows you to improve the use of disk spaces and network traffic without sacrificing data quality.

What output file formats can I use to compress HTML files?

We support a variety of output file formats for HTML optimization, including DOCX, DOC, RTF, ODT, EPUB, JPG, PNG, XLS, XLSX, WPS and many more.

What is the maximum HTML size supported by Aspose.Words for .NET?

There are no size limits to compress HTML files using Aspose.Words for .NET.

C# Compress HTML

Compress HTML file in C#

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

Reduce the size of HTML files using C#

C# 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 .NET'. The following example demonstrates how to optimize the content of a HTML file in C#:

Code example in C# to compress HTML files

Input file

Upload a file you want to optimize/compress

Run code

Output format

Select the target format from the list

using Aspose.Words;

var doc = new Document("Input.html");
doc.Cleanup();

var nodes = doc.GetChildNodes(NodeType.Shape, true);
foreach (Shape shape in nodes)
{
    if (shape.IsImage)
    {
        // It's up to developer to choose the library for image compression.
        using var image = Image.Fromstream(shape.ImageData.ToStream());

        // ...
        // Compress image and set it back to the shape.
        shape.ImageData.SetImage("yourCompressedImage");
    }
}

doc.Save("Output.html");
							using Aspose.Words;

var doc = new Document("Input.html");
doc.Cleanup();

var nodes = doc.GetChildNodes(NodeType.Shape, true);
foreach (Shape shape in nodes)
{
    if (shape.IsImage)
    {
        // It's up to developer to choose the library for image compression.
        using var image = Image.FromStream(shape.ImageData.ToStream());

        // ...
        // Compress image and set it back to the shape.
        shape.ImageData.SetImage("yourCompressedImage");
    }
}

var saveOptions = new PdfSaveOptions
{
    CacheBackgroundGraphics = true
};

doc.Save("Output.html", saveOptions);
 
							using Aspose.Words;

var doc = new Document("Input.html");
doc.Cleanup();

var nodes = doc.GetChildNodes(NodeType.Shape, true);
foreach (Shape shape in nodes)
{
    if (shape.IsImage)
    {
        // It's up to developer to choose the library for image compression.
        using var image = Image.Fromstream(shape.ImageData.ToStream());

        // ...
        // Compress image and set it back to the shape.
        shape.ImageData.SetImage("yourCompressedImage");
    }
}

doc.Save("Output.html"); 
							using Aspose.Words;

var doc = new Document("Input.html");
doc.Cleanup();

var nodes = doc.GetChildNodes(NodeType.Shape, true);
foreach (Shape shape in nodes)
{
    if (shape.IsImage)
    {
        // It's up to developer to choose the library for image compression.
        using var image = Image.FromStream(shape.ImageData.ToStream());

        // ...
        // Compress image and set it back to the shape.
        shape.ImageData.SetImage("yourCompressedImage");
    }
}


var saveOptions = new OoxmlSaveOptions
{
  CompressionLevel = CompressionLevel.Maximum
};

doc.Save("Output.html", saveOptions); 
							using Aspose.Words;

var doc = new Document();
var builder = new DocumentBuilder(doc);

var shape = builder.InsertImage("Input.html");

// Update page settings to crop the document to fit the size of the picture.
var pageSetup = builder.PageSetup;
pageSetup.PageWidth = shape.Width;
pageSetup.PageHeight = shape.Height;
pageSetup.TopMargin = 0;
pageSetup.LeftMargin = 0;
pageSetup.BottomMargin = 0;
pageSetup.RightMargin = 0;

var saveOptions = new ImageSaveOptions(SaveFormat.Html)
{

};

doc.Save("Output.html", saveOptions); 
							using Aspose.Words;
using Aspose.Words.Pdf2Word.FixedFormats;

using var pdfStream = File.OpenRead("Input.html");

var renderer = new PdfFixedRenderer();
var pdfReadOptions = new PdfFixedOptions
{
    ImageFormat = FixedImageFormat.Jpeg,
    JpegQuality = 50
};

const double maxPageDimension = 1584;
var pagesStream = renderer.SavePdfAsImages(pdfStream, pdfReadOptions);

var builder = new DocumentBuilder();
for (var i = 0; i < pagesStream.Count; ++i)
{
    // Set maximum page size to avoid the current page image scaling.
    var pageSetup = builder.PageSetup;
    SetPageSize(pageSetup, maxPageDimension, maxPageDimension);

    var pageImage = builder.InsertImage(pagesStream[i]);

    SetPageSize(pageSetup, pageImage.Width, pageImage.Height);
    pageSetup.TopMargin = 0;
    pageSetup.LeftMargin = 0;
    pageSetup.BottomMargin = 0;
    pageSetup.RightMargin = 0;

    if (i != pagesStream.Count - 1)
        builder.InsertBreak(BreakType.SectionBreakNewPage);
}

var saveOptions = new PdfSaveOptions
{
    CacheBackgroundGraphics = true
};

builder.Document.Save("Output.html", saveOptions);

private void SetPageSize(PageSetup pageSetup, double width, double height)
{
    pageSetup.PageWidth = width;
    pageSetup.PageHeight = height;
}
 
			

					Run code
				

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

How to compress HTML C#

Install Aspose.Words for .NET.
Add a library reference (import the library) to your C# project.
Open the source HTML file in C#.
Compress HTML without losing quality.
Call the Document.Cleanup() method. The resulting code may vary depending on the output file format.
Get the compressed result as a HTML file.

C# library to optimize and compress HTML files

There are three alternative options to install "Aspose.Words for .NET" onto your system. 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

Our product is fully cross-platform and supports all major .NET implementations:

.NET ≥ 5.0
.NET Core ≥ 2.0
.NET Standard ≥ 2.0
.NET Framework ≥ 3.5
MonoMac
MonoAndroid
Xamarin

As far as .NET code doesn't depend on the underlying hardware or operating system, but only on a Virtual Machine, you are free to develop any kind of software for Windows, macOS, Android, iOS and Linux. Just make sure you have installed the corresponding version of .NET Framework, .NET Core, Windows Azure, Mono or Xamarin.

We recommend using Microsoft Visual Studio, Xamarin, and MonoDevelop integrated development environments to create C#, F#, VB.NET applications.

Fore more details please refer to Product Documentation.

You can optimize files in many other file formats: