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HTML to PDF Converter Library for .NET

EVO HTML to PDF Converter for .NET and .NET Core offers full support for HTML tags, CSS styles, SVG vector graphics, Canvas, Web Fonts, JavaScript, page breaks control with CSS styles, repeating HTML table header and footer in PDF pages, live URLs and internal links in PDF, automatically generated hierarchical bookmarks and table of contents, HTML in the headers and footers. The library is more than a HTML to PDF converter. You can also use it to easily merge, split, edit and fill existing PDF documents.

EVO HTML to PDF Converter Icon
EVO HTML to PDF Converter
for .Net

EVO HTML to PDF Converter library for .NET can be easily integrated in your .NET and .NET Core applications, including ASP.NET web sites, desktop applications, Azure Cloud services to convert HTML pages and HTML strings to PDF documents, raster images or SVG vector images.

The HTML to PDF Converter for .NET The library does not rely on external tools or services and does not require installation or server configuration changes, supporting simple copy deployment.

The converter offers full support for HTML tags, CSS styles, SVG vector graphics, page breaks control with CSS styles, automatically repeated HTML table header on each PDF page, live URLs and internal links in PDF, automatically generated bookmarks, HTML in the headers and footers, Unicode and right to left text, PDF merge, split and edit.

There are separate libraries and downloadable ZIP packages for .NET Framework and for .NET Core platforms. The library for .NET Framework is compatible with .NET 2.0 and .NET 4.0 and the later runtimes. The library for .NET Core was built for .NET Standard 2.0 and is compatible with .NET Core 2.0, .NET Core 3.1, .NET Core 6.0 and later.

The libraries for .NET and .NET Core are compatible with Windows platforms. In .NET applications for Linux, macOS, Windows, Azure App Service, Xamarin, UWP and other platforms you can use the Cross-Platform PDF Library for .NET which includes the HTML to PDF, Word to PDF, Excel to PDF, PDF to Text, PDF to Image, PDF to HTML and PDF Images Extractor components from EVO PDF Toolkit in a single library under an unique namespace.

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Code Samples Code Samples
User Guide User Guide
API Reference API Reference
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Download Icon Compatibility

EVO HTML to PDF Converter for .NET is compatible with any platform which supports .NET Standard 2.0 and above or .NET Framework 4.0 and above, including:

  • .NET Core 8, 7, 6, 5, .NET Standard 2.0 (and above)
  • .NET Framework 4.8.1, 4.7.2, 4.6.1, 4.0 (and above)
  • Windows 32-bit (x86) and 64-bit (x64)
  • Azure Cloud Services and Azure Virtual Machines
  • Web, Console and Desktop applications
For Linux, macOS, Windows, Azure App Service, Xamarin, UWP and other platforms you can use the Cross-Platform PDF Library for .NET which includes the HTML to PDF, Word to PDF, Excel to PDF, PDF to Text, PDF to Image, PDF to HTML and PDF Images Extractor components from EVO PDF Toolkit in a single library under an unique namespace.
Download Icon Software Download
The evaluation version of the EVO HTML to PDF Converter can be downloaded as a zip archive. The software does not need installation. You can simply extract the archive into a folder and reference the .NET assembly in your project. Please check the Release Notes to see the new features and the latest changes. You must read and accept our End User License Agreement before you download the software. Downloading the software from our website implies that you agreed the terms and conditions.
Download HTML to PDF Converter v11.0 for .NET
Download HTML to PDF Converter v11.0 for .NET Core
Note: After you unzip the archive into a folder make sure that the product binaries and documentation files (the .dll and .chm files) were not blocked by Windows OS. To unblock the file click the "Unblock" button if this button is displayed in file properties in Windows Explorer.
The HTML to PDF converter library you can download from the link above works well both in 32-bit and 64-bit environments. The 64-bit environments offers more memory for the executing processes and the version below is optimized to take advantage of this opportunity when converting very large HTML documents:
Download HTML to PDF Converter for .NET - Optimized for 64-bit
Download HTML to PDF Converter for .NET Core - Optimized for 64-bit
While the default version of the EVO HTML to PDF converter works both in 32-bit and 64-bit environments, the version optimized for 64-bit systems works only in 64-bit systems and it is not compatible with 32-bit environments.
Code Sample Icon Getting Started

You can quickly start with the demo applications from the Samples folder of the downloaded package or you can integrate the library in your own project. To start with your own project, first add a reference to library.

In projects targeting the .NET Framework platform you can reference directly the EvoHtmlToPdf.dll assembly from root folder of the ZIP package for .NET Framework or alternatively the NuGet Logo ImageEvoPdf or NuGet Logo ImageEvoPdf.HtmlToPdf NuGet packages.

In projects targeting the .NET Core platform you can reference the NuGet Logo ImageEvoPdf.HtmlToPdf.NetCore NuGet package or alternatively the EvoHtmlToPdf_NetCore.dll from the Bin folder of the ZIP package for .NET core, but in this case you also have to manually reference the EvoPdf.HtmlToPdf.NetCore package dependencies.

After the reference to library was added to your project you are now ready to start writing code to convert HTML to PDF in your .NET application

Code Sample Icon C# Code Samples

Copy the C# code lines from the section below to use the HTML to PDF Converter component to create a PDF document from a web page or from a HTML string and save the resulted PDF to a memory buffer for further processing, to a PDF file or send it to browser for download in ASP.NET applications.

At the top of your C# source file add the using EvoPdf; statement to make available the EVO HTML to PDF Converter API for your .NET application.

// add this using statement at the top of your C# file
using EvoPdf;

To convert a HTML string or an URL to a PDF file you can use the C# code below.

// create the converter object in your code where you want to run conversion
HtmlToPdfConverter converter = new HtmlToPdfConverter();

// convert the HTML string to a PDF file
converter.ConvertHtmlToFile("<b>Hello World</b> from EVO PDF !", null, "HtmlToFile.pdf");

// convert HTML page from URL to a PDF file
string htmlPageURL = "http://www.evopdf.com";
converter.ConvertUrlToFile(htmlPageURL, "UrlToFile.pdf");

To convert a HTML string or an URL to a PDF document in a memory buffer and then save it to a file you can use the C# code below.

// create the converter object in your code where you want to run conversion
HtmlToPdfConverter converter = new HtmlToPdfConverter();

// convert a HTML string to a memory buffer
byte[] htmlToPdfBuffer = converter.ConvertHtml("<b>Hello World</b> from EVO PDF !", null);

// write the memory buffer to a PDF file
System.IO.File.WriteAllBytes("HtmlToMemory.pdf", htmlToPdfBuffer);

// convert an URL to a memory buffer
string htmlPageURL = "http://www.evopdf.com";
byte[] urlToPdfBuffer = converter.ConvertUrl(htmlPageURL);

// write the memory buffer to a PDF file
System.IO.File.WriteAllBytes("UrlToMemory.pdf", urlToPdfBuffer);

To convert in your ASP.NET Core and ASP.NET MVC applications a HTML string or an URL to a PDF document in a memory buffer and then send it for download to browser you can use the C# code below.

// create the converter object in your code where you want to run conversion
HtmlToPdfConverter converter = new HtmlToPdfConverter();

// convert a HTML string to a memory buffer
byte[] htmlToPdfBuffer = converter.ConvertHtml("<b>Hello World</b> from EVO PDF !", null);

FileResult fileResult = new FileContentResult(htmlToPdfBuffer, "application/pdf");
fileResult.FileDownloadName = "HtmlToPdf.pdf";
return fileResult;

To convert in your ASP.NET Web Forms application a HTML string to a PDF document in a memory buffer and then send it for download to browser you can use the C# code below.

// create the converter object in your code where you want to run conversion
HtmlToPdfConverter converter = new HtmlToPdfConverter();

// convert a HTML string to a memory buffer
byte[] htmlToPdfBuffer = converter.ConvertHtml("<b>Hello World</b> from EVO PDF !", null);

HttpResponse httpResponse = HttpContext.Current.Response;
httpResponse.AddHeader("Content-Type", "application/pdf");
httpResponse.AddHeader("Content-Disposition",
    String.Format("attachment; filename=HtmlToPdf.pdf; size={0}",
    htmlToPdfBuffer.Length.ToString()));
httpResponse.BinaryWrite(htmlToPdfBuffer);
httpResponse.End();
Features Features
Easy integration, no installation or setup is required on server
Designed and tested for multithreaded environments
Does not require IE WebBrowser or any third party tools
Compatible with .NET Framework and .NET Core Runtime
Compatible with Windows Azure Cloud applications
Can be deployed on the server by simple xcopy deployment
Works both in 32-bit and 64-bit environments
Convert web pages, HTML strings to PDF files or in memory
Convert web pages, HTML strings to raster image formats
Convert web pages, HTML strings to SVG vector images
Support for HTML5 features like CSS3, SVG and Web Fonts
Convert HTML with SVG and Web Fonts to PDF
Different styles for screen and print using @media rules
Merge multiple web pages into the single PDF document
Convert only a selected part of the HTML document
Generate PDF/A and PDF/X compliant documents
Generate CMYK and Gray Scale PDF documents
Full support for Unicode and right to left languages
Set PDF page size to a standard (A4, etc.) or a custom size
Set PDF page orientation and PDF document margins
Set JPEG compression level for images in PDF document
Add HTML content and page numbers in header and footer
Add page numbering in header and footer HTML
Control header and footer visibility in each PDF page
Add header and footer to existing PDF documents
Auto resize header and footer to adapt to content
Control page breaks in PDF using standard CSS styles
Control page breaks in PDF using API
'Keep Together' feature with page-break-inside:avoid
Avoid page breaks inside HTML elements using API
Option to avoid cutting off images between PDF pages
Add content in PDF pages background during conversion
Add content over PDF page main content during conversion
Repeat the HTML table header and footer in PDF pages
Place and resize the HTML content anywhere in a PDF page
Shrink or stretch the HTML content to fit the PDF page
Automatically resize the PDF page to fit the HTML content
Convert HTTP links from HTML to HTTP links in PDF
Convert internal links from HTML to internal links in PDF
Auto create a bookmarks hierarchy from heading tags
Select in HTML the elements to bookmark
Select in API the elements to bookmark
Auto create a table of contents from heading tags
Define in HTML the elements to include in table of contents
Auto create a live PDF form from a HTML form
Define in HTML the elements to become fields in PDF form
Get the location in PDF for a set of selected HTML elements
Embed true type fonts into the rendered PDF for portability
Append or prepend external PDF files to conversion result
Password protect and set permissions of the PDF document
Add a digital signature to generated PDF document
Set the PDF document properties like title, subject, etc.
Enable or disable JavaScript during conversion
HTTP authentication support (IIS Windows Authentication)
Use current user credentials for NTLM authentication
Support for access through a HTTP or SOCKS Proxy
Access the HTML page with GET or POST HTTP methods
Add HTTP headers when the HTML page is requested
Add cookies when the HTML page is requested
Execute a JavaScript when the PDF document is opened
Go to a page when the PDF document is opened
Open the print dialog when the PDF document is opened
Set the zoom level when the PDF document is opened
Support for Flash and other extensions
Add file links and attachments to generated PDF document
Add text notes to generated PDF document
Add watermarks and stamps to generated PDF document
Add graphic elements to generated PDF document
Add image elements to generated PDF document
Add text elements to generated PDF document
Edit existing PDF document
Merge multiple PDF documents in a single PDF document
Split a PDF document in multiple PDF documents
Fill PDF forms and save the filled PDF document
C# and VB.NET samples for ASP.NET, Windows Forms
Sample code for ASP.NET MVC with Razor engine
Sample code for a Windows Azure Cloud Service
Full documentation for all the product features
Code Sample Icon C# Full Code Sample for ASP.NET

EVO HTML to PDF Converter for .NET API allows you to convert a HTML document to PDF in just a few lines a code. The programming interface is also very rich and allows you customize the generated PDF document in various ways. The code below is copied from the Getting Started demo for HTML to PDF Converter that you can find in the Samples folder of the software Zip package.

protected void convertToPdfButton_Click(object sender, EventArgs e)
{
    // Create a HTML to PDF converter object with default settings
    HtmlToPdfConverter htmlToPdfConverter = new HtmlToPdfConverter();

    // Set license key received after purchase to use the converter in licensed mode
    // Leave it not set to use the converter in demo mode
    htmlToPdfConverter.LicenseKey = "4W9+bn19bn5ue2B+bn1/YH98YHd3d3c=";

    // Set HTML Viewer width in pixels which is the equivalent in converter of the browser window width
    htmlToPdfConverter.HtmlViewerWidth = int.Parse(htmlViewerWidthTextBox.Text);

    // Set HTML viewer height in pixels to convert the top part of a HTML page 
    // Leave it not set to convert the entire HTML
    if (htmlViewerHeightTextBox.Text.Length > 0)
        htmlToPdfConverter.HtmlViewerHeight = int.Parse(htmlViewerHeightTextBox.Text);

    // Set PDF page size which can be a predefined size like A4 or a custom size in points 
    // Leave it not set to have a default A4 PDF page
    htmlToPdfConverter.PdfDocumentOptions.PdfPageSize = SelectedPdfPageSize();

    // Set PDF page orientation to Portrait or Landscape
    // Leave it not set to have a default Portrait orientation for PDF page
    htmlToPdfConverter.PdfDocumentOptions.PdfPageOrientation = SelectedPdfPageOrientation();

    // Set the maximum time in seconds to wait for HTML page to be loaded 
    // Leave it not set for a default 60 seconds maximum wait time
    htmlToPdfConverter.NavigationTimeout = int.Parse(navigationTimeoutTextBox.Text);

    // Set an adddional delay in seconds to wait for JavaScript or AJAX calls after page load completed
    // Set this property to 0 if you don't need to wait for such asynchcronous operations to finish
    if (conversionDelayTextBox.Text.Length > 0)
        htmlToPdfConverter.ConversionDelay = int.Parse(conversionDelayTextBox.Text);

    // The buffer to receive the generated PDF document
    byte[] outPdfBuffer = null;

    if (convertUrlRadioButton.Checked)
    {
        string url = urlTextBox.Text;

        // Convert the HTML page given by an URL to a PDF document in a memory buffer
        outPdfBuffer = htmlToPdfConverter.ConvertUrl(url);
    }
    else
    {
        string htmlString = htmlStringTextBox.Text;
        string baseUrl = baseUrlTextBox.Text;

        // Convert a HTML string with a base URL to a PDF document in a memory buffer
        outPdfBuffer = htmlToPdfConverter.ConvertHtml(htmlString, baseUrl);
    }

    // Send the PDF as response to browser

    // Set response content type
    Response.AddHeader("Content-Type", "application/pdf");

    // Instruct the browser to open the PDF file as an attachment or inline
    Response.AddHeader("Content-Disposition", String.Format("{0}; filename=Getting_Started.pdf; size={1}",
        openInlineCheckBox.Checked ? "inline" : "attachment", outPdfBuffer.Length.ToString()));

    // Write the PDF document buffer to HTTP response
    Response.BinaryWrite(outPdfBuffer);

    // End the HTTP response and stop the current page processing
    Response.End();
}
Code Sample Icon C# Full Code Sample for MVC

EVO HTML to PDF Converter for .NET can be used in any type of .NET application including ASP.NET MVC websites. The code below is copied from the Getting Started demo for MVC that you can find in the Samples\Other\Mvc folder of the software Zip package.

[HttpPost]
public ActionResult ConvertHtmlToPdf(FormCollection collection)
{
    // Create a HTML to PDF converter object with default settings
    HtmlToPdfConverter htmlToPdfConverter = new HtmlToPdfConverter();

    // Set HTML Viewer width in pixels which is the equivalent in converter of the browser window width
    htmlToPdfConverter.HtmlViewerWidth = int.Parse(collection["htmlViewerWidthTextBox"]);

    // Set HTML viewer height in pixels to convert the top part of a HTML page 
    // Leave it not set to convert the entire HTML
    if (collection["htmlViewerHeightTextBox"].Length > 0)
        htmlToPdfConverter.HtmlViewerHeight = int.Parse(collection["htmlViewerHeightTextBox"]);

    // Set PDF page size which can be a predefined size like A4 or a custom size in points 
    // Leave it not set to have a default A4 PDF page
    htmlToPdfConverter.PdfDocumentOptions.PdfPageSize = SelectedPdfPageSize(collection["pdfPageSizeDropDownList"]);

    // Set PDF page orientation to Portrait or Landscape
    // Leave it not set to have a default Portrait orientation for PDF page
    htmlToPdfConverter.PdfDocumentOptions.PdfPageOrientation = SelectedPdfPageOrientation(collection["pdfPageOrientationDropDownList"]);

    // Set the maximum time in seconds to wait for HTML page to be loaded 
    // Leave it not set for a default 60 seconds maximum wait time
    htmlToPdfConverter.NavigationTimeout = int.Parse(collection["navigationTimeoutTextBox"]);

    // Set an adddional delay in seconds to wait for JavaScript or AJAX calls after page load completed
    // Set this property to 0 if you don't need to wait for such asynchcronous operations to finish
    if (collection["conversionDelayTextBox"].Length > 0)
        htmlToPdfConverter.ConversionDelay = int.Parse(collection["conversionDelayTextBox"]);

    string url = collection["urlTextBox"];

    // Convert the HTML page given by an URL to a PDF document in a memory buffer
    byte[] outPdfBuffer = htmlToPdfConverter.ConvertUrl(url);

    // Send the PDF file to browser
    FileResult fileResult = new FileContentResult(outPdfBuffer, "application/pdf");
    fileResult.FileDownloadName = "Getting_Started.pdf";

    return fileResult;
}