How to Render HTML String to PDF

by Regan Pun

IronPDF allows developers to create PDF documents easily in C#, F#, and VB.NET for .NET Core and .NET Framework. IronPdf supports rendering any HTML string into a PDF and the rendering process is undertaken by a fully functional version of the Google Chromium engine, embedded within IronPDF DLL.

How to Render HTML String to PDF

Download HTML String to PDF C# Library
Install with NuGet to Test the Library
Enter HTML string to render
Set an optional BasePath to load external assets
Save and download the PDF

or

HTML String to PDF Example

Here we have an example of IronPDF renderig HTML string into a PDF by using the RenderHtmlAsPdf() method. The parameter is a Html string to be rendered as a PDF.

:path=/static-assets/pdf/content-code-examples/how-to/html-string-to-pdf.cs

using IronPdf;

// Instantiate Renderer
var renderer = new ChromePdfRenderer();

// Create a PDF from a HTML string using C#
var pdf = renderer.RenderHtmlAsPdf("<h1>Hello World</h1>");

// Export to a file or Stream
pdf.SaveAs("output.pdf");

Imports IronPdf

' Instantiate Renderer
Private renderer = New ChromePdfRenderer()

' Create a PDF from a HTML string using C#
Private pdf = renderer.RenderHtmlAsPdf("<h1>Hello World</h1>")

' Export to a file or Stream
pdf.SaveAs("output.pdf")

VB C#

In cases where an HTML string is obtained from an external source, and disabling local disk access or cross-origin requests is desired, the Installation.EnableWebSecurity property can be set to true to achieve that.

Result

This is the file that the code produced:

Advanced HTML to PDF Example

Here we have an example of IronPDF loading external image asset from an optional BasePath. Setting the BaseUrlOrPath property gives the relative file path or URL context for hyper-links, images, CSS and JavaScript files.

:path=/static-assets/pdf/content-code-examples/how-to/html-string-to-pdf-2.cs

using IronPdf;

// Instantiate Renderer
var renderer = new ChromePdfRenderer();

// Advanced Example with HTML Assets
// Load external html assets: Images, CSS and JavaScript.
// An optional BasePath 'C:\site\assets\' is set as the file location to load assets from
var myAdvancedPdf = renderer.RenderHtmlAsPdf("<img src='icons/iron.png'>", @"C:\site\assets\");
myAdvancedPdf.SaveAs("html-with-assets.pdf");

Imports IronPdf

' Instantiate Renderer
Private renderer = New ChromePdfRenderer()

' Advanced Example with HTML Assets
' Load external html assets: Images, CSS and JavaScript.
' An optional BasePath 'C:\site\assets\' is set as the file location to load assets from
Private myAdvancedPdf = renderer.RenderHtmlAsPdf("<img src='icons/iron.png'>", "C:\site\assets\")
myAdvancedPdf.SaveAs("html-with-assets.pdf")

How to Render HTML String to PDF