Tools inside GroupDocs.Redaction for .NET

Text Redaction in POWERPOINT with Overlays Using .NET

Protect content in your POWERPOINT files by placing overlay blocks with help from C# and GroupDocs.Redaction for .NET.

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Secure content in Powerpoint documents

Use GroupDocs.Redaction for .NET in your .NET apps to clean files before distribution.

Pass the file path to a new Redactor instance.
Set what and how you want to redact.
Define the text pattern and set the overlay color.
Redact and save your updated file.

Sample redactions Copy

// Overlay text in POWERPOINT to hide details

// Use Redactor to open your file
using (Redactor redactor  = new Redactor("input.pptx"))
{
    // Adjust settings for redaction
    // Select text and a blocking color
    var opt = new ReplacementOptions(System.Drawing.Color.Red);
    
    var redaction = new ExactPhraseRedaction("Text to hide", opt);

    // Run and save your redacted file
    redactor.Apply(redaction);
    redactor.Save();
}

dotnet add package GroupDocs.Redaction

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Hide sensitive data easily

Use GroupDocs.Redaction for .NET to remove or cover content across document types — ideal for protecting data in legal, business, or personal files.

Swap out text

Find words or numbers and replace or hide them.

Redact photos or sections

Add overlays to images or selected spots on a page.

Remove extra data

Clean out metadata that may reveal hidden info.

Find & redact with regex

This shows how regex can help identify and hide text

C#

Download result Copy

//  Open the file that needs redaction
using (Redactor redactor  = new Redactor("source.pptx"))
{
    // Set up your rules using regex
    var repl_opt = new ReplacementOptions(System.Drawing.Color.Blue);
    var redaction = new RegexRedaction("\\d{2}\\s*\\d{2}[^\\d]*\\d{6}", repl_opt);

    // Run redaction process
    redactor.Apply(redaction);

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