Stamping HTML Content

from ironpdf import *

# Create an HtmlStamper object to stamp an image onto a PDF
stamper = HtmlStamper("<img src='https://ironpdf.com/img/products/ironpdf-logo-text-dotnet.svg'/>")
stamper.HorizontalAlignment = HorizontalAlignment.Center
stamper.VerticalAlignment = VerticalAlignment.Bottom
stamper.IsStampBehindContent = False
stamper.Opacity = 30

# Load an existing PDF document and apply the stamp to it
pdf = PdfDocument.FromFile("Sample.pdf")
pdf.ApplyStamp(stamper).SaveAs("stampedimage.pdf")

Stamping HTML Content

IronPDF for Python can overlay HTML content onto existing PDF pages using the HtmlStamper class, allowing you to add logos, images, text, or any other HTML-rendered element on top of or behind page content.

Getting Started

Create an HtmlStamper with your HTML fragment, configure its positioning and appearance properties, load a PdfDocument, and call ApplyStamp to apply the stamp to all pages.

Understanding the Code

HtmlStamper(html): Accepts an HTML string — including <img> tags, styled text, or any valid HTML — and creates a stamper object that renders that HTML as an overlay.
HorizontalAlignment: Controls the horizontal position of the stamp on the page. Options include Left, Center, and Right.
VerticalAlignment: Controls the vertical position. Options include Top, Middle, and Bottom.
IsStampBehindContent: When False (default), the stamp appears on top of existing page content. Set to True to render the stamp behind the content, useful for watermarks or background graphics.
Opacity: A value from 0 (transparent) to 100 (fully opaque) that controls how visible the stamp is on the page.
PdfDocument.FromFile(path): Loads the existing PDF to be stamped.
ApplyStamp(stamper): Applies the stamp to all pages of the document and returns the modified PdfDocument.