import {PdfDocument} from "@ironsoftware/ironpdf"; (async () => { // Render new PDF document const pdf = await PdfDocument.fromHtml("<h1>.NET6</h1>"); // Parameters const pageIndex = 0; // Page index (zero-based) const oldText = ".NET6"; // Old text to remove const newText = ".NET7"; // New text to add // Replace text on the specified page await pdf.replaceText(oldText, newText, pageIndex); // Save the modified PDF document await pdf.saveAs("newSample.pdf"); })();

Text Find and Replace

This code example demonstrates how to replace specific text in any PDF document. This feature can be applied to both newly rendered and existing PDFs.

To replace text in a PDF document, you can utilize the replaceText method. It requires three arguments: the old text to find, the new text to replace it with, and the page index where this replacement should take place. In this example, it substitutes ".NET6" with ".NET7" on the specified page.

using IronPdf;
using System;

class PDFTextReplacer
{
    static void Main()
    {
        // Load an existing PDF document
        var pdfDocument = PdfDocument.FromFile("example.pdf");

        // The old text to be replaced
        string oldText = ".NET6";

        // The new text that will replace the old text
        string newText = ".NET7";

        // Page index where the text replacement should occur (0-based index)
        int pageIndex = 0;

        // Replace text on the specified page
        pdfDocument.ReplaceText(pageIndex, oldText, newText);

        // Save the modified PDF document to a new file
        pdfDocument.SaveAs("modified_example.pdf");

        // Inform the user that the process is complete
        Console.WriteLine("Text replacement complete. Modified PDF saved as 'modified_example.pdf'.");
    }
}

using IronPdf;
using System;

class PDFTextReplacer
{
    static void Main()
    {
        // Load an existing PDF document
        var pdfDocument = PdfDocument.FromFile("example.pdf");

        // The old text to be replaced
        string oldText = ".NET6";

        // The new text that will replace the old text
        string newText = ".NET7";

        // Page index where the text replacement should occur (0-based index)
        int pageIndex = 0;

        // Replace text on the specified page
        pdfDocument.ReplaceText(pageIndex, oldText, newText);

        // Save the modified PDF document to a new file
        pdfDocument.SaveAs("modified_example.pdf");

        // Inform the user that the process is complete
        Console.WriteLine("Text replacement complete. Modified PDF saved as 'modified_example.pdf'.");
    }
}

Imports IronPdf
Imports System

Friend Class PDFTextReplacer
	Shared Sub Main()
		' Load an existing PDF document
		Dim pdfDocument = PdfDocument.FromFile("example.pdf")

		' The old text to be replaced
		Dim oldText As String = ".NET6"

		' The new text that will replace the old text
		Dim newText As String = ".NET7"

		' Page index where the text replacement should occur (0-based index)
		Dim pageIndex As Integer = 0

		' Replace text on the specified page
		pdfDocument.ReplaceText(pageIndex, oldText, newText)

		' Save the modified PDF document to a new file
		pdfDocument.SaveAs("modified_example.pdf")

		' Inform the user that the process is complete
		Console.WriteLine("Text replacement complete. Modified PDF saved as 'modified_example.pdf'.")
	End Sub
End Class

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Once the text replacement is completed, you can save the modified PDF document using the SaveAs method. For more information on how to manipulate and manage PDF files, visit the IronPDF Features Page.

Additionally, you can explore other powerful tools offered by Iron Software, such as IronOCR for OCR capabilities, IronBarcode for barcode generation and reading, or IronSoftware.com for a full list of products.