import {PdfDocument} from "@ironsoftware/ironpdf"; (async () => { const options = { margin: { top: 40, left: 20, right: 20, bottom: 40, }, }; // Render HTML file to PDF const pdf = await PdfDocument.fromHtml("my-content.html", { renderOptions: options }); // Save the PDF await pdf.saveAs("my-content.pdf"); })();

Set Custom Margins

Customizing margins is a straightforward task with IronPDF.

Begin by setting up the rendering options and specifying the margins for the PDF content. In this example, we have defined a top margin of 40 units, a left margin of 20 units, a right margin of 20 units, and a bottom margin of 40 units. These margin values control the spacing between the content and the edges of each page within the PDF.

Utilize the PdfDocument.fromHtml method to convert an HTML file into a PDF document using IronPDF's extensive HTML-to-PDF capabilities. The rendering options, which include the customized margins, should be provided within the renderOptions object.

Once the HTML content has been successfully rendered into a PDF document, proceed to export the resulting PDF, taking full advantage of IronPDF's powerful document conversion features.

Here's an example code snippet demonstrating how to set margins:

// Import the necessary IronPDF libraries
using IronPdf;

class Program
{
    static void Main(string[] args)
    {
        // Create an instance of the HtmlToPdf class
        HtmlToPdf renderer = new HtmlToPdf();

        // Set up the rendering options with specified margins
        var renderOptions = new PdfPrintOptions()
        {
            MarginTop = 40,   // Top margin in units
            MarginLeft = 20,  // Left margin in units
            MarginRight = 20, // Right margin in units
            MarginBottom = 40 // Bottom margin in units
        };

        // Assign the custom rendering options to the renderer
        renderer.PrintOptions = renderOptions;

        // Define the HTML content to be converted
        string htmlContent = "<html><body><h1>Hello, IronPDF!</h1></body></html>";

        // Convert the HTML content to a PDF document
        PdfDocument pdfDocument = renderer.RenderHtmlAsPdf(htmlContent);

        // Export the PDF document to a file
        pdfDocument.SaveAs("output.pdf");
    }
}

// Import the necessary IronPDF libraries
using IronPdf;

class Program
{
    static void Main(string[] args)
    {
        // Create an instance of the HtmlToPdf class
        HtmlToPdf renderer = new HtmlToPdf();

        // Set up the rendering options with specified margins
        var renderOptions = new PdfPrintOptions()
        {
            MarginTop = 40,   // Top margin in units
            MarginLeft = 20,  // Left margin in units
            MarginRight = 20, // Right margin in units
            MarginBottom = 40 // Bottom margin in units
        };

        // Assign the custom rendering options to the renderer
        renderer.PrintOptions = renderOptions;

        // Define the HTML content to be converted
        string htmlContent = "<html><body><h1>Hello, IronPDF!</h1></body></html>";

        // Convert the HTML content to a PDF document
        PdfDocument pdfDocument = renderer.RenderHtmlAsPdf(htmlContent);

        // Export the PDF document to a file
        pdfDocument.SaveAs("output.pdf");
    }
}

' Import the necessary IronPDF libraries
Imports IronPdf

Friend Class Program
	Shared Sub Main(ByVal args() As String)
		' Create an instance of the HtmlToPdf class
		Dim renderer As New HtmlToPdf()

		' Set up the rendering options with specified margins
		Dim renderOptions = New PdfPrintOptions() With {
			.MarginTop = 40,
			.MarginLeft = 20,
			.MarginRight = 20,
			.MarginBottom = 40
		}

		' Assign the custom rendering options to the renderer
		renderer.PrintOptions = renderOptions

		' Define the HTML content to be converted
		Dim htmlContent As String = "<html><body><h1>Hello, IronPDF!</h1></body></html>"

		' Convert the HTML content to a PDF document
		Dim pdfDocument As PdfDocument = renderer.RenderHtmlAsPdf(htmlContent)

		' Export the PDF document to a file
		pdfDocument.SaveAs("output.pdf")
	End Sub
End Class

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Explanation of the code:

Import IronPDF: Ensure you have included the necessary using directives to access IronPDF's features.
Initialize HtmlToPdf: Create an object of HtmlToPdf to handle the HTML to PDF conversion.
Configure Margins: Define a PdfPrintOptions object setting the margins for the PDF pages. The margins are important for layout and help define where content will be placed relative to the edge of the paper.
Set Print Options: Assign the PdfPrintOptions (with margin specifications) to the renderer.PrintOptions.
HTML Content: Define your HTML content in a string. This is what will be converted into the PDF format.
Render HTML to PDF: Call RenderHtmlAsPdf on the renderer, passing in the HTML content. This method returns a PdfDocument object.
Save PDF: Save the resulting PdfDocument to a file using SaveAs, providing the path where you want to store the PDF.