PDF Generator C#

Free for development. Licenses from $399

Examples

HTML PDF Generator Run

 // Install IronPdf with Nuget:  PM> Install-Package IronPdf
using IronPdf;

// Create a PDF from an existing HTML using C#
 var Renderer = new IronPdf.HtmlToPdf();
 var PDF = Renderer.RenderHTMLFileAsPdf("Assets/TestInvoice1.html");
 var OutputPath = "Invoice.pdf";
 PDF.SaveAs(OutputPath);

' Install IronPdf with Nuget:  PM> Install-Package IronPdf
Imports IronPdf

' Create a PDF from an existing HTML using C#
 Private Renderer = New IronPdf.HtmlToPdf()
 Private PDF = Renderer.RenderHTMLFileAsPdf("Assets/TestInvoice1.html")
 Private OutputPath = "Invoice.pdf"
 PDF.SaveAs(OutputPath)

URL PDF Generator Run

// Install IronPdf with Nuget:  PM> Install-Package IronPdf
using IronPdf;

IronPdf.HtmlToPdf Renderer = new IronPdf.HtmlToPdf();
Renderer.RenderUrlAsPdf("https://ironpdf.com/").SaveAs("url.pdf");



// or System.IO.MemoryStream PdfStream = PDF.GetStream;
// or byte[] PdfBinary = PDF.GetBinary;

' Install IronPdf with Nuget:  PM> Install-Package IronPdf
Imports IronPdf

Private Renderer As New IronPdf.HtmlToPdf()
Renderer.RenderUrlAsPdf("https://ironpdf.com/").SaveAs("url.pdf")



' or System.IO.MemoryStream PdfStream = PDF.GetStream;
' or byte[] PdfBinary = PDF.GetBinary;

ASPX PDF Generator

private void Form1_Load(object sender, EventArgs e)
{
IronPdf.AspxToPdf.RenderThisPageAsPdf();
//Changes the ASPX output into a pdf instead of html
}

Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs)
IronPdf.AspxToPdf.RenderThisPageAsPdf()
'Changes the ASPX output into a pdf instead of html
End Sub

HTML PDF Generator Run

// PM> Install-Package IronPdf

using IronPdf;

var Renderer = new IronPdf.HtmlToPdf();
Renderer.RenderHtmlAsPdf("<h1>Html with CSS and Images</h1>").SaveAs("example.pdf");

 



// Advanced:  Load external html assets: images, css and javascript.
// An optional "base" asset locating path can be set as a url or local directory. 
var PDF = Renderer.RenderHtmlAsPdf("<img src='icons/iron.png'>", @"C:\site\assets\");
PDF.SaveAs("html-with-assets.pdf");

' PM> Install-Package IronPdf

Imports IronPdf

Private Renderer = New IronPdf.HtmlToPdf()
Renderer.RenderHtmlAsPdf("<h1>Html with CSS and Images</h1>").SaveAs("example.pdf")





' Advanced:  Load external html assets: images, css and javascript.
' An optional "base" asset locating path can be set as a url or local directory. 
Dim PDF = Renderer.RenderHtmlAsPdf("<img src='icons/iron.png'>", "C:\site\assets\")
PDF.SaveAs("html-with-assets.pdf")

Images PDF Generator

// Install IronPdf with Nuget:  PM> Install-Package IronPdf
using IronPdf;
using System.IO;
using System.Linq;

// Select one or more images.  This example selects all JPEG images in a specific folder.
var ImageFiles = Directory.EnumerateFiles(@"C:\project\assets").Where(f => f.EndsWith(".jpg") || f.EndsWith(".jpeg"));

// Convert the images to a PDF and save it.
ImageToPdfConverter.ImageToPdf(ImageFiles).SaveAs(@"C:\project\composite.pdf");
            
//Also see PdfDocument.RasterizeToImageFiles() method to flatten a PDF to images or thumbnails

' Install IronPdf with Nuget:  PM> Install-Package IronPdf
Imports IronPdf
Imports System.IO
Imports System.Linq

' Select one or more images.  This example selects all JPEG images in a specific folder.
Private ImageFiles = Directory.EnumerateFiles("C:\project\assets").Where(Function(f) f.EndsWith(".jpg") OrElse f.EndsWith(".jpeg"))

' Convert the images to a PDF and save it.
ImageToPdfConverter.ImageToPdf(ImageFiles).SaveAs("C:\project\composite.pdf")

'Also see PdfDocument.RasterizeToImageFiles() method to flatten a PDF to images or thumbnails

PDF to Images

// Install IronPdf with Nuget:  PM> Install-Package IronPdf
using IronPdf;
using System.Drawing;


//Example rendering PDF documents to Images or Thumbnails

var pdf = PdfDocument.FromFile("Example.pdf");

//Extract all pages to a folder as image files
 pdf.RasterizeToImageFiles(@"C:\image\folder\*.png");

//Dimensions and page ranges may be specified
 pdf.RasterizeToImageFiles(@"C:\image\folder\thumbnail_*.jpg", 100,80);


//Extract all pages as System.Drawing.Bitmap objects
Bitmap[] pageImages = pdf.ToBitmap();

' Install IronPdf with Nuget:  PM> Install-Package IronPdf
Imports IronPdf
Imports System.Drawing


'Example rendering PDF documents to Images or Thumbnails

Private pdf = PdfDocument.FromFile("Example.pdf")

'Extract all pages to a folder as image files
 pdf.RasterizeToImageFiles("C:\image\folder\*.png")

'Dimensions and page ranges may be specified
 pdf.RasterizeToImageFiles("C:\image\folder\thumbnail_*.jpg", 100,80)


'Extract all pages as System.Drawing.Bitmap objects
Dim pageImages() As Bitmap = pdf.ToBitmap()

Headers & Footers

// Install IronPdf with Nuget:  PM> Install-Package IronPdf
using IronPdf;

IronPdf.HtmlToPdf Renderer = new IronPdf.HtmlToPdf();

// add a header to every page easily
Renderer.PrintOptions.FirstPageNumber = 1; // use 2 if a coverpage  will be appended
Renderer.PrintOptions.Header.DrawDividerLine = true;
Renderer.PrintOptions.Header.CenterText = "{url}" ;
Renderer.PrintOptions.Header.FontFamily = "Helvetica,Arial";
Renderer.PrintOptions.Header.FontSize = 12;

// add a footer too
Renderer.PrintOptions.Footer.DrawDividerLine = true;
Renderer.PrintOptions.Footer.FontFamily = "Arial";
Renderer.PrintOptions.Footer.FontSize = 10;
Renderer.PrintOptions.Footer.LeftText = "{date} {time}";
Renderer.PrintOptions.Footer.RightText = "{page} of {total-pages}";

// mergable fields are:
// {page} {total-pages} {url} {date} {time} {html-title} & {pdf-title}

' Install IronPdf with Nuget:  PM> Install-Package IronPdf
Imports IronPdf

Private Renderer As New IronPdf.HtmlToPdf()

' add a header to every page easily
Renderer.PrintOptions.FirstPageNumber = 1 ' use 2 if a coverpage  will be appended
Renderer.PrintOptions.Header.DrawDividerLine = True
Renderer.PrintOptions.Header.CenterText = "{url}"
Renderer.PrintOptions.Header.FontFamily = "Helvetica,Arial"
Renderer.PrintOptions.Header.FontSize = 12

' add a footer too
Renderer.PrintOptions.Footer.DrawDividerLine = True
Renderer.PrintOptions.Footer.FontFamily = "Arial"
Renderer.PrintOptions.Footer.FontSize = 10
Renderer.PrintOptions.Footer.LeftText = "{date} {time}"
Renderer.PrintOptions.Footer.RightText = "{page} of {total-pages}"

' mergable fields are:
' {page} {total-pages} {url} {date} {time} {html-title} & {pdf-title}

PDF Forms

           
// Install IronPdf with Nuget:  PM> Install-Package IronPdf
using IronPdf;

// Step 1.  Creating a PDF with editable forms from HTML using form and input tags

var FormHtml = @"
<html>
    <body>
        <h2>Editable PDF  Form</h2>
        <form>
          First name:<br> <input type='text' name='firstname' value=''   > <br>
          Last name:<br> <input type='text' name='lastname'  value='' >
        </form>
    </body>
</html>";

IronPdf.HtmlToPdf Renderer = new IronPdf.HtmlToPdf();
Renderer.PrintOptions.CreatePdfFormsFromHtml = true;
Renderer.RenderHtmlAsPdf(FormHtml).SaveAs("BasicForm.pdf");

// Step 2. Reading and Writing PDF form values.
var FormDocument = PdfDocument.FromFile("BasicForm.pdf");

//Set and Read the value of the "firstname" field
var FirstNameField =  FormDocument.Form.GetFieldByName("firstname");
FirstNameField.Value = "Minnie";
Console.WriteLine("FirstNameField value: {0}", FirstNameField.Value);

//Set and Read the value of the "lastname" field
IronPdf.Forms.FormField LastNameField = FormDocument.Form.GetFieldByName("lastname");
LastNameField.Value = "Mouse";
Console.WriteLine("LastNameField value: {0}", LastNameField.Value);

FormDocument.SaveAs("FilledForm.pdf");

' Install IronPdf with Nuget:  PM> Install-Package IronPdf
Imports IronPdf

' Step 1.  Creating a PDF with editable forms from HTML using form and input tags

Private FormHtml = "
<html>
    <body>
        <h2>Editable PDF  Form</h2>
        <form>
          First name:<br> <input type='text' name='firstname' value=''   > <br>
          Last name:<br> <input type='text' name='lastname'  value='' >
        </form>
    </body>
</html>"

Private Renderer As New IronPdf.HtmlToPdf()
Renderer.PrintOptions.CreatePdfFormsFromHtml = True
Renderer.RenderHtmlAsPdf(FormHtml).SaveAs("BasicForm.pdf")

' Step 2. Reading and Writing PDF form values.
Dim FormDocument = PdfDocument.FromFile("BasicForm.pdf")

'Set and Read the value of the "firstname" field
Dim FirstNameField = FormDocument.Form.GetFieldByName("firstname")
FirstNameField.Value = "Minnie"
Console.WriteLine("FirstNameField value: {0}", FirstNameField.Value)

'Set and Read the value of the "lastname" field
Dim LastNameField As IronPdf.Forms.FormField = FormDocument.Form.GetFieldByName("lastname")
LastNameField.Value = "Mouse"
Console.WriteLine("LastNameField value: {0}", LastNameField.Value)

FormDocument.SaveAs("FilledForm.pdf")

Responsive HTML to PDF

// Install IronPdf with Nuget:  PM> Install-Package IronPdf
using IronPdf;

IronPdf.HtmlToPdf Renderer = new IronPdf.HtmlToPdf();

 //Choose screen or print CSS media
Renderer.PrintOptions.CssMediaType = PdfPrintOptions.PdfCssMediaType.Screen;

//Set the width of the responsive virtual browser window in pixels
Renderer.PrintOptions.ViewPortWidth = 1280; 

// Render an HTML document or snippet as a string
Renderer.RenderHTMLFileAsPdf("Assets/Responsive.html");

' Install IronPdf with Nuget:  PM> Install-Package IronPdf
Imports IronPdf

Private Renderer As New IronPdf.HtmlToPdf()

 'Choose screen or print CSS media
Renderer.PrintOptions.CssMediaType = PdfPrintOptions.PdfCssMediaType.Screen

'Set the width of the responsive virtual browser window in pixels
Renderer.PrintOptions.ViewPortWidth = 1280

' Render an HTML document or snippet as a string
Renderer.RenderHTMLFileAsPdf("Assets/Responsive.html")

PDF Generation Settings

// Install IronPdf with Nuget:  PM> Install-Package IronPdf
using IronPdf;

IronPdf.HtmlToPdf Renderer = new IronPdf.HtmlToPdf();

Renderer.PrintOptions.SetCustomPaperSizeInInches(12.5, 20);
Renderer.PrintOptions.PrintHtmlBackgrounds = true;
Renderer.PrintOptions.PaperOrientation = PdfPrintOptions.PdfPaperOrientation.Portrait;
Renderer.PrintOptions.Title = "My PDF Document Name";
Renderer.PrintOptions.EnableJavaScript = true;
Renderer.PrintOptions.RenderDelay = 50; //ms
Renderer.PrintOptions.CssMediaType = PdfPrintOptions.PdfCssMediaType.Screen;
Renderer.PrintOptions.DPI = 300;
Renderer.PrintOptions.FitToPaperWidth = true;
Renderer.PrintOptions.JpegQuality = 80;
Renderer.PrintOptions.GrayScale = false;
Renderer.PrintOptions.FitToPaperWidth = true;
Renderer.PrintOptions.InputEncoding = Encoding.UTF8;
Renderer.PrintOptions.Zoom = 100;
Renderer.PrintOptions.CreatePdfFormsFromHtml = true;

Renderer.PrintOptions.MarginTop = 40;  //millimeters
Renderer.PrintOptions.MarginLeft = 20;  //millimeters
Renderer.PrintOptions.MarginRight = 20;  //millimeters
Renderer.PrintOptions.MarginBottom = 40;  //millimeters

Renderer.PrintOptions.FirstPageNumber = 1; //use 2 if a coverpage  will be appended

Renderer.RenderHTMLFileAsPdf("my-content.html").SaveAs("my-content.pdf");

' Install IronPdf with Nuget:  PM> Install-Package IronPdf
Imports IronPdf

Private Renderer As New IronPdf.HtmlToPdf()

Renderer.PrintOptions.SetCustomPaperSizeInInches(12.5, 20)
Renderer.PrintOptions.PrintHtmlBackgrounds = True
Renderer.PrintOptions.PaperOrientation = PdfPrintOptions.PdfPaperOrientation.Portrait
Renderer.PrintOptions.Title = "My PDF Document Name"
Renderer.PrintOptions.EnableJavaScript = True
Renderer.PrintOptions.RenderDelay = 50 'ms
Renderer.PrintOptions.CssMediaType = PdfPrintOptions.PdfCssMediaType.Screen
Renderer.PrintOptions.DPI = 300
Renderer.PrintOptions.FitToPaperWidth = True
Renderer.PrintOptions.JpegQuality = 80
Renderer.PrintOptions.GrayScale = False
Renderer.PrintOptions.FitToPaperWidth = True
Renderer.PrintOptions.InputEncoding = Encoding.UTF8
Renderer.PrintOptions.Zoom = 100
Renderer.PrintOptions.CreatePdfFormsFromHtml = True

Renderer.PrintOptions.MarginTop = 40 'millimeters
Renderer.PrintOptions.MarginLeft = 20 'millimeters
Renderer.PrintOptions.MarginRight = 20 'millimeters
Renderer.PrintOptions.MarginBottom = 40 'millimeters

Renderer.PrintOptions.FirstPageNumber = 1 'use 2 if a coverpage  will be appended

Renderer.RenderHTMLFileAsPdf("my-content.html").SaveAs("my-content.pdf")

Explore the code and run it to see the sample PDFs