Redact PDFs in C# .NET

Permanently redact and remove sensitive information from PDFs using C#. Search and redact specific fields like emails, names, phone numbers, and addresses. Integrate smart PDF redaction to automatically identify and redact key values in documents.

Coordinate-based redaction

For precise manual redaction, you can define rectangular regions and apply permanent redaction in a few steps:

using GdPicture14;

LicenseManager licence = new LicenseManager();
licence.RegisterKEY("");

using GdPicturePDF pdf = new GdPicturePDF();
pdf.LoadFromFile(@"input.pdf");
pdf.AddRedactionRegion(72, 707, 40, 14);
pdf.ApplyRedaction();
pdf.SaveToFile(@"output.pdf");

For multi-page and advanced coordinate control, see Redact using coordinates.

Smart redaction

Based on its advanced artificial intelligence (AI) and document understanding engine, Nutrient .NET SDK recognizes sensitive information in a document and marks it for redaction. After you validate these marks, Nutrient .NET SDK removes them from the document.

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