GroupDocs.Redaction for .NET features

Hide Sensitive Text in PDF Documents with Overlays Using .NET

Take control of PDF file content using C#. Use redactions to protect legal, financial, and personal information.

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Protect business data in Pdf documents

GroupDocs.Redaction for .NET: built to help your .NET apps keep documents safe. Redact private info quickly and easily.

Create a Redactor instance and provide the path to the Pdf file you want to redact.
Configure redaction settings to get the result you need.
Just set the text pattern to search for and pick the overlay color.
Redact the document and save the changes.

Sample redactions Copy

// Hide sensitive text in PDF with overlay images

// Pass the file path to the Redactor constructor
using (Redactor redactor  = new Redactor("input.pdf"))
{
    // Set up the redaction options
    // Define the text pattern and overlay color
    var opt = new ReplacementOptions(System.Drawing.Color.Red);
    
    var redaction = new ExactPhraseRedaction("Text to hide", opt);

    // Redact and save the updated PDF file
    redactor.Apply(redaction);
    redactor.Save();
}

dotnet add package GroupDocs.Redaction

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Redact content in documents

With GroupDocs.Redaction for .NET, you can remove or hide content across many file types. Protect sensitive information while keeping your documents easy to read and share.

Edit text anywhere

Search and replace any matching text in your document to help secure confidential data.

Cover images

Place overlays over full images or selected areas to hide private visuals.

Handle metadata

Erase or change hidden metadata to prevent unwanted data leaks.

Use regular expressions to hide text

This example shows how to find and hide text using regular expressions

C#

Download result Copy

//  Load the document you want to redact
using (Redactor redactor  = new Redactor("source.pdf"))
{
    // Define the redaction settings: text pattern and color
    var repl_opt = new ReplacementOptions(System.Drawing.Color.Blue);
    var redaction = new RegexRedaction("\\d{2}\\s*\\d{2}[^\\d]*\\d{6}", repl_opt);

    // Apply redaction to the content
    redactor.Apply(redaction);

    // Save the redacted version
    var save_opt = new SaveOptions() { AddSuffix = true, RasterizeToPDF = false };
    var outputPath = redactor.Save(save_opt);
}

dotnet add package GroupDocs.Redaction

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About GroupDocs.Redaction for .NET

GroupDocs.Redaction for .NET gives C# developers the tools to hide or remove content from PDF files. It’s a simple way to keep documents safe. You can cover text, images, or metadata in many file types.

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