IronPdf.Classic 2021.9.3678

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dotnet add package IronPdf.Classic --version 2021.9.3678
NuGet\Install-Package IronPdf.Classic -Version 2021.9.3678
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="IronPdf.Classic" Version="2021.9.3678" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add IronPdf.Classic --version 2021.9.3678
#r "nuget: IronPdf.Classic, 2021.9.3678"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
// Install IronPdf.Classic as a Cake Addin
#addin nuget:?package=IronPdf.Classic&version=2021.9.3678

// Install IronPdf.Classic as a Cake Tool
#tool nuget:?package=IronPdf.Classic&version=2021.9.3678

Passing Nuget Downloads Support

IronPDF is a .NET library to generate, read, edit & save PDF files in .NET projects. IronPDF features HTML to PDF for .NET 5, Core, Standard & Framework with full HTML to PDF support including CSS3 and JS.

Visit our website for a quick-start guide at

using IronPdf;

var Renderer = new IronPdf.ChromePdfRenderer();
Renderer.RenderHtmlAsPdf("<h1>Html with CSS and Images</h1>").SaveAs("pixel-perfect.pdf");

/****** Advanced ******/
// 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 PDF = Renderer.RenderHtmlAsPdf("<img src='icons/iron.png'>", @"C:\site\assets\");


Welcome to the cutting edge of .NET PDF rendering and manipulation technology with IronPDF 2021 now featuring Chrome identical HTML rendering with full support for:

  • C#, F#, and VB.NET
  • .Net 5, Core 2x & 3x, Standard 2, and Framework 4x
  • Console, Web, & Desktop Apps
  • Windows, Linux (Debian, CentOS, Ubuntu), MacOs, Docker, and Azure
  • Microsoft Visual Studio or Jetbrains ReSharper & Rider

Generating PDFs

Generate PDFs in C# with HTML, MVC, ASPX, & images.

  • HTML to PDF using HTML Files, Strings, URLs, ASPX, Razor and MVC Views
  • Image to PDF and PDF to Image
  • Supports Base 64 Encoding, Base URLs, and Custom File Paths
  • Website & System Logins, Custom User Agents, Proxies, Cookies, HTTP Headers, Async & Multithreading

Formatting PDFs

Supports HTML, JS and CSS Standards using modern Chrome Rendering

  • HTML (5 and below), CSS (Screen & Print), Images (jpg, png, gif, tiff, svg, bmp), JavaScript (+ Render Delays), Fonts (Web & Icon)
  • Use Responsive Layouts, Set Virtual Viewports and Zoom
  • Apply Headers & Footers, Page Numbers, and Page Breaks
  • Page Settings for Custom Paper Size, Orientation & Rotation, Margins (mm, inch, & zero), Color & Grayscale, Resolution & JPEG Quality
  • International Language Support with UTF-8 HTML Encoding

Manipulating PDFs

Edit, Read and Secure PDF Documents

  • Merge & Split PDFs. Add / Duplicate / Delete Pages
  • Add New HTML Content, Headers & Footers, Stamp & Watermark, Backgrounds & Foregrounds, Annotations, Outlines & Bookmarks
  • Create, Edit, and Fill PDF Forms
  • Apply PDF Metadata, Permissions & Passwords, Digital Signatures
  • Print PDFs to Physical Printers
  • Read Text and Images from PDFs

You can email us at for support directly from our code team. We offer licensing and extensive support for commercial deployment projects.

Installing IronPDF 2021

To Install:

PM> Install-Package IronPdf

Upgrade Guide for Existing Users

IronPdf updates all usages of your existing HtmlToPdf and AspToPdf code to use our new Chrome Rendering Engine.

Remove any reference to IronPdf.Threading which is now legacy software. The IronPdf main package is threading and async compatible!

Try out the new 2021 API

We haven’t broken the IronPDF API you are using, it will remain! However, the old style is being superseded by a better one to give you more control. For examples you now have Print options and Http Login controls specific to your renderer

using IronPdf;
ChromePdfRenderer Renderer = new ChromePdfRenderer();
Renderer.RenderingOptions.FitToPaper = true;
Renderer.RenderingOptions.CssMediaType = IronPdf.Rendering.PdfCssMediaType.Screen;
Renderer.RenderingOptions.PrintHtmlBackgrounds = true;
Renderer.RenderingOptions.CreatePdfFormsFromHtml = true;
var doc = Renderer.RenderHtmlAsPdf(“<h1>Hello world!</h1>“);
//var doc = Renderer.RenderUrlAsPdf(“”);
//var doc = Renderer.RenderHtmlFileAsPdf(“example.html”);

Pixel perfect Chrome rendering!

This example will give you PDFs which are pixel perfect to the latest chrome desktop browser’s “print to pdf” functionality:

ChromePdfRenderer Renderer = new ChromePdfRenderer();
Renderer.RenderingOptions.CssMediaType = IronPdf.Rendering.PdfCssMediaType.Print;
Renderer.RenderingOptions.PrintHtmlBackgrounds = false;
Renderer.RenderingOptions.CreatePdfFormsFromHtml = false;
var doc = Renderer.RenderUrlAsPdf(“”);

However...we would recommend using improved features such as:

Using screen stylesheets to print PDFs which are less fiddly to develop and more true to existing web assets.

  • Responsive layout support
  • Creating PDF Forms from your HTML form elements.
ChromePdfRenderer Renderer = new ChromePdfRenderer();
Renderer.RenderingOptions.CssMediaType = IronPdf.Rendering.PdfCssMediaType.Screen;
Renderer.RenderingOptions.PrintHtmlBackgrounds = true;
Renderer.RenderingOptions.CreatePdfFormsFromHtml = true;
Renderer.RenderingOptions.ViewportWidth = 1080 ; //px
var doc = Renderer.RenderUrlAsPdf(“”);

Comparing Chrome and WebKit

You can use the IronPdf.Rendering.AdaptivePdfRenderer to switch between the ‘Chrome’ and ‘WebKit’ rendering at an instance level if you preferred the old rendering style for some of your application, or dont want to break unit tests.

using IronPdf;
IronPdf.Rendering.AdaptivePdfRenderer Renderer = new IronPdf.Rendering.AdaptivePdfRenderer();
Renderer.RenderingOptions.RenderingEngine = IronPdf.Rendering.PdfRenderingEngine.Chrome;  //switch between Chrome and WebKit here
var doc = Renderer.RenderHtmlAsPdf(“<h1>Hello world!</h1>“);

Use every CPU core available!

  • Multithreading and Async support for our Chrome rendering engine is in a different league to previous build.
  • For enterprise grade multi-threading use our Chrome in your existing threads and it will work. For web applications this also takes zero setup.
  • For batch processing for HtmlToPdf we suggest using the built in .NETParallel.ForEach
  • We love async and have provided Async variants of methods such as ChromePdfRenderer.RenderHtmlAsPdf

MSDN Style Class Reference

Explore the IronPDF API in the left navigation of this page. Popular Links include:

There are no supported framework assets in this package.

Learn more about Target Frameworks and .NET Standard.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last updated
2021.12.4401 11,066 12/1/2021
2021.11.4257 370 11/15/2021
2021.11.4183 35,967 10/28/2021
2021.9.3737 356 9/20/2021
2021.9.3678 374 8/26/2021

Feature Spotlight:
The primary upgrade is IronPdf in 2021 is ‘Chrome Identical’ PDF rendering.
* Added Chrome, WebKit and Adaptive Rendering to IronPdf

*  Pixel Perfect Chrome HTML to PDF Rendering
*  Full Multithreading an Async Support
*  Razor and MVC helpers added
*  ChromePdfRenderer Class added
*  WebKitPdfRenderer Class added
*  AdaptivePdfRenderer Class added

Minor breaking API changes exist.
* Chrome renderer replaces WebKit as our default HtmlToPdf engine.   Html, CSS add JS is rendered more accurately, which may cause layout changes for existing users
* Minor breaking API changes