How to Use Web Assets & Optimize PDFs in C# for Performance

// Pixel Perfect HTML Formatting Settings
IronPdf.ChromePdfRenderer renderer = new IronPdf.ChromePdfRenderer();
renderer.RenderingOptions.CssMediaType = PdfCssMediaType.Print; // or Screen

using IronPdf;
using IronPdf.Rendering;

ChromePdfRenderer renderer = new ChromePdfRenderer();

// Change the paper size to small
renderer.RenderingOptions.SetCustomPaperSizeinPixelsOrPoints(600, 400);

// Choose screen or print CSS media
renderer.RenderingOptions.CssMediaType = PdfCssMediaType.Print;

// Render HTML to PDF
PdfDocument pdf = renderer.RenderHtmlFileAsPdf("tableHeader.html");

pdf.SaveAs("tableHeader.pdf");

using IronPdf;

ChromePdfRenderer renderer = new ChromePdfRenderer();

string html = @"<img src='https://ironsoftware.com/img/products/ironpdf-logo-text-dotnet.svg'>";

// Render HTML to PDF
PdfDocument pdf = renderer.RenderHtmlAsPdf(html);

// Export PDF
pdf.SaveAs("embedImage.pdf");

using IronPdf;

string htmlWithJavaScript = @"<h1>This is HTML</h1>
<script>
    document.write('<h1>This is JavaScript</h1>');
    window.ironpdf.notifyRender();
</script>";

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

// Enable JavaScript
renderer.RenderingOptions.EnableJavaScript = true;
// Set waitFor for JavaScript
renderer.RenderingOptions.WaitFor.JavaScript(500);

// Render HTML contains JavaScript
var pdfJavaScript = renderer.RenderHtmlAsPdf(htmlWithJavaScript);

// Export PDF
pdfJavaScript.SaveAs("javascriptHtml.pdf");

using IronPdf;

ChromePdfRenderer renderer = new ChromePdfRenderer();

// Render as soon as the page is loaded
renderer.RenderingOptions.WaitFor.PageLoad();

PdfDocument pdf = renderer.RenderHtmlAsPdf("<h1>testing</h1>");

using IronPdf;

// HTML contains webfont
var html = @"<link href=""https://fonts.googleapis.com/css?family=Lobster"" rel=""stylesheet"">
<p style=""font-family: 'Lobster', serif; font-size:30px;"" > Hello Google Fonts</p>";

ChromePdfRenderer renderer = new ChromePdfRenderer();

// Wait for font to load
renderer.RenderingOptions.WaitFor.AllFontsLoaded(2000);

// Render HTML to PDF
PdfDocument pdf = renderer.RenderHtmlAsPdf(html);

// Export the PDF
pdf.SaveAs("font-test.pdf");

using IronPdf;

string html = "<img src='https://ironsoftware.com/img/svgs/new-banner-svg.svg' style='width:100px'>";

ChromePdfRenderer renderer = new ChromePdfRenderer();
renderer.RenderingOptions.WaitFor.RenderDelay(1000);

PdfDocument pdf = renderer.RenderHtmlAsPdf(html);
pdf.SaveAs("svgToPdf.pdf");

using IronPdf;
using IronPdf.Fonts;
using System.Collections.Generic;

// Import PDF
PdfDocument pdf = PdfDocument.FromFile("sample.pdf");

// Retreive font
PdfFontCollection fonts = pdf.Fonts;

using IronPdf;

const string html_with_utf_8 =
    @"<p>周態告応立待太記行神正用真最。音日独素円政進任見引際初携食。更火識将回興継時億断保媛全職。
    文造画念響竹都務済約記求生街東。天体無適立年保輪動元念足総地作靖権瀬内。
    失文意芸野画美暮実刊切心。感変動技実視高療試意写表重車棟性作家薄井。
    陸瓶右覧撃稿法真勤振局夘決。任堀記文市物第前兜純響限。囲石整成先尾未展退幹販山令手北結。</p>
    <p>
    أم يذكر النفط قبضتهم على, الصين وفنلندا ما حدى. تم لكل أملاً المنتصر,
    ٣٠ حدى مارد القوى. شرسة للسيطرة قامفي. حتى أم يطول المحيط,
    زهاء وحلفاؤها من فعل. لم قامت الجو الساحلية وتم, ويعزى واقتصار قبل كل.
    </p>
    <p>
    ภคันทลาพาธสตาร์เซฟตี้ แชมป์ มาร์เก็ตติ้งล้มเหลวโยเกิร์ต แลนด์บาบูนอึมครึม รุสโซ แบรนด์ไคลแม็กซ์ พิซซ่าโมเดลเสือโคร่ง ม็อบโซนรายชื่อ
    แอดมิชชั่น ด็อกเตอร์ พะเรอ มาร์คเจไดโมจิราสเบอร์รี เอนทรานซ์ออดิชั่นศิลปวัฒนธรรมเปราะบาง โมจิซีเรียสวอลนัตทริปลีเมอร์ ทิป วาไรตี้บิ๊กเมเปิล
    </p>";

var renderer = new ChromePdfRenderer();
renderer.RenderingOptions.InputEncoding = System.Text.Encoding.UTF8;

var pdf = renderer.RenderHtmlAsPdf(html_with_utf_8);
pdf.SaveAs("Unicode.pdf");

using IronPdf;

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

string baseUrl = @"C:\site\assets\";
string html = "<img src='icons/iron.png'>";

// Render HTML to PDF
PdfDocument pdf = renderer.RenderHtmlAsPdf(html, baseUrl);

// Export PDF
pdf.SaveAs("html-with-assets.pdf");

using IronPdf;

// Configure IronPdf settings
IronPdf.Installation.SingleProcess = true;
IronPdf.Installation.ChromeGpuMode = IronPdf.Engines.Chrome.ChromeGpuModes.Hardware;

ChromePdfRenderer renderer = new ChromePdfRenderer();

// Set delay before rendering
renderer.RenderingOptions.WaitFor.RenderDelay(5000);

// Render from URL
PdfDocument pdf = renderer.RenderUrlAsPdf("https://docs.mapbox.com/mapbox-gl-js/example/geojson-layer-in-slot/");

pdf.SaveAs("webGL.pdf");

using IronPdf;

ChromePdfRenderer renderer = new ChromePdfRenderer();

renderer.RenderingOptions.CssMediaType = IronPdf.Rendering.PdfCssMediaType.Print;
renderer.RenderingOptions.PrintHtmlBackgrounds = false;
renderer.RenderingOptions.CreatePdfFormsFromHtml = false;

PdfDocument pdf = renderer.RenderUrlAsPdf("https://www.google.com/");

using IronPdf;

ChromePdfRenderer renderer = new ChromePdfRenderer();

PdfDocument pdf = renderer.RenderUrlAsPdf("https://en.wikipedia.org/wiki/Main_Page");

// Compress images in the PDF
pdf.CompressAndSaveAs("compressed.pdf", 40);

using IronPdf;
using System.Threading.Tasks;

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

string[] htmlStrings = {"<h1>Html 1</h1>", "<h1>Html 2</h1>", "<h1>Html 3</h1>"};

// Create an array to store the tasks for rendering
var renderingTasks = new Task<PdfDocument>[htmlStrings.Length];

for (int i = 0; i < htmlStrings.Length; i++)
{
    int index = i; // Capturing the loop variable
    renderingTasks[i] = Task.Run(async () =>
    {
        // Render HTML to PDF
        return await renderer.RenderHtmlAsPdfAsync(htmlStrings[index]);
    });
}

// Wait for all rendering tasks to complete
// await Task.WhenAll(renderingTasks);

IronSoftware.Logger.LoggingMode = IronSoftware.Logger.LoggingModes.Custom;
IronSoftware.Logger.CustomLogger = new CustomLoggerClass("logging");

using IronPdf;

// Select the desired PDF File
PdfDocument pdf = PdfDocument.FromFile("before.pdf");

// Flatten the pdf
pdf.Flatten();

// Save as a new file
pdf.SaveAs("after_flatten.pdf");

using IronPdf;

ChromePdfRenderer renderer = new ChromePdfRenderer();

PdfDocument pdf = renderer.RenderHtmlAsPdf("<h1>Test printing</h1>");

// Send the document to "Microsoft Print to PDF" printer
pdf.Print("Microsoft Print to PDF");