GroupDocs.Watermark 24.8.0

.NET API for Advanced Document Watermarking

GroupDocs.Watermark for .NET is a versatile and powerful NuGet package designed to help developers seamlessly add, detect, customize, and remove watermarks in 40+ file formats, including PDFs, Word® documents, Excel® spreadsheets, PowerPoint® presentations, images, Visio® diagrams, and more. This robust API supports advanced watermarking features such as batch processing, dynamic watermark creation based on metadata, content-aware watermarking, and comprehensive security measures to protect sensitive documents. With cross-platform compatibility across Windows®, Linux, and macOS, and full support for .NET Framework, .NET Core, and .NET Standard, GroupDocs.Watermark for .NET is the ideal solution for integrating scalable watermarking capabilities into any .NET application, ensuring document integrity, brand protection, and compliance with legal standards.

General Watermarking Features

• Add Watermarks: Add text, image, or metadata watermarks to various document formats including PDFs, Microsoft Office® files, and images.
• Watermark Detection: Detect existing watermarks in documents, including both text and image-based watermarks.
• Watermark Removal: Remove detected watermarks while preserving the document's original format and quality.
• Watermark Management: Manage multiple watermarks within a single document, including editing, searching, and removing watermarks.
• Customizable Watermark Appearance: Adjust properties such as size, color, font, opacity, rotation, and position of watermarks.

Supported Document Formats

• Microsoft Office®: Watermark Word® (DOC, DOCX), Excel® (XLS, XLSX), and PowerPoint® (PPT, PPTX) files.
• PDF Documents: Full support for watermarking and annotation of PDF files, including PDF/A formats.
• Image Formats: Supports JPEG, PNG, BMP, TIFF, and more for image watermarking.
• Visio® Diagrams: Watermark Microsoft Visio® formats such as VSD, VSDX.
• OpenDocument Formats: Support for ODT, ODS, ODP, and other OpenDocument formats.
• AutoCAD Files: Add watermarks to DWG, DXF formats.
• Email Formats: Annotate and watermark EML, EMLX files.
• HTML and HTM: Add watermarks to web-based documents.

Advanced Watermarking Capabilities

• Batch Processing: Apply watermarks to multiple documents simultaneously for increased efficiency.
• Content-Aware Watermarking: Apply watermarks that adapt based on the document’s content.
• Dynamic Watermark Creation: Create watermarks using dynamic properties like date, time, and document metadata.
• Layering and Transparency: Control the layering of watermarks, and adjust transparency to avoid obscuring content.
• Conditional Watermarking: Apply watermarks based on specific triggers or document conditions.
• Watermark Sensitivity: Control the sensitivity level for watermark detection.

PDF-Specific Watermarking

• Page-Specific Watermarks: Apply watermarks to specific pages or all pages of a PDF document.
• PDF/A Support: Fully compatible with PDF/A standards.
• Password-Protected PDF Handling: Ability to add or remove watermarks in password-protected PDF files.

Microsoft Office® Watermarking

• Word® Document Watermarks: Watermark Word® files across both older (97-2003) and newer (2007 and later) formats.
• Excel® Sheet Watermarking: Apply watermarks to entire Excel® workbooks or specific sheets.
• PowerPoint® Presentation Watermarking: Add watermarks to individual slides or entire presentations.

Image Watermarking

• Multi-Frame TIFF Support: Apply watermarks to multi-frame TIFF images.
• Vector Graphics Watermarks: Add scalable vector-based watermarks to images, maintaining quality upon resizing.

Security and Compliance

• Document Protection: Enhance document security by adding invisible or visible watermarks to prevent unauthorized use.
• Digital Signatures: Compatible with digitally signed documents, ensuring watermarking does not invalidate signatures.
• Encryption Support: Apply watermarks without compromising the encryption or security of the document.
• Compliance: Ensure documents meet legal and organizational standards by embedding required watermarks.

Platform and Integration

• Cross-Platform Compatibility: Works across various operating systems, including Windows®, Linux, and macOS.
• .NET Compatibility: Fully compatible with .NET Framework, .NET Core, and .NET Standard.
• API Integration: Easily integrate with .NET applications, providing a comprehensive set of functionalities.
• No External Dependencies: Operates independently without the need for third-party software installation.

Performance and Optimization

• High Performance: Optimized for handling large documents and applying watermarks efficiently.
• Scalable API: Suitable for large-scale watermarking tasks, capable of processing high volumes of documents.
• Batch Processing: Process multiple documents in a single operation for faster watermarking.

Export and Conversion

• Document Conversion: Convert watermarked documents into different formats while preserving the watermark.
• Output Customization: Customize the output settings when saving watermarked documents to meet specific needs.

Supported Watermark Formats

System Requirements

Get Started

Are you ready to give GroupDocs.Watermark for .NET a try? Simply execute Install-Package GroupDocs.Watermark from Package Manager Console in Visual Studio to fetch & reference GroupDocs.Watermark assembly in your project. If you already have GroupDocs.Watermark for .Net and want to upgrade it, please execute Update-Package GroupDocs.Watermark to get the latest version.

Please check the GitHub Repository for other common usage scenarios.

GroupDocs.Watermark for .NET API Code Samples

Code Sample 1: Adding a Text Watermark to a PDF Document

This code snippet demonstrates how to add a customizable text watermark to a PDF document using GroupDocs.Watermark for .NET. The text watermark includes options for setting the font, color, size, rotation, and opacity, ensuring that the watermark is prominently displayed without obscuring the document content. This feature is particularly useful for branding or protecting PDF documents from unauthorized use.

using GroupDocs.Watermark;
using GroupDocs.Watermark.Options.Pdf;

public class AddTextWatermarkToPdf
{
    public static void Run()
    {
        // Load the PDF document
        using (Watermarker watermarker = new Watermarker("input.pdf"))
        {
            // Create a text watermark with customizable properties
            TextWatermark textWatermark = new TextWatermark("Confidential", new Font("Arial", 36));
            textWatermark.ForegroundColor = Color.Red;
            textWatermark.Opacity = 0.5;
            textWatermark.RotationAngle = 45;

            // Add the watermark to all pages of the PDF
            watermarker.Add(textWatermark);
            
            // Save the watermarked PDF document
            watermarker.Save("output.pdf");
        }
    }
}

Code Sample 2: Removing an Existing Watermark from a Microsoft Word® Document

This code snippet illustrates how to detect and remove existing watermarks from a Microsoft Word® document (DOCX) using GroupDocs.Watermark for .NET. This feature is essential for users who need to clean up documents by removing unwanted or outdated watermarks, ensuring the document remains professional and clear of any distracting marks.

using GroupDocs.Watermark;
using GroupDocs.Watermark.Options.Word®;

public class RemoveWatermarkFromWord®
{
    public static void Run()
    {
        // Load the Word® document
        using (Watermarker watermarker = new Watermarker("input.docx"))
        {
            // Search and remove all watermarks from the document
            watermarker.Remove(WatermarkSearchCriteria.Text("Confidential"));
            
            // Save the document without the watermark
            watermarker.Save("output.docx");
        }
    }
}

Code Sample 3: Applying an Image Watermark with Transparency to a PowerPoint® Presentation

This code snippet demonstrates how to add an image watermark with adjustable transparency to a PowerPoint® presentation (PPTX) using GroupDocs.Watermark for .NET. Image watermarks are ideal for adding logos or brand images to presentations, ensuring that the visual identity of the organization is maintained while allowing the underlying content to remain visible.

using GroupDocs.Watermark;
using GroupDocs.Watermark.Options.Presentation;

public class AddImageWatermarkToPptx
{
    public static void Run()
    {
        // Load the PowerPoint® presentation
        using (Watermarker watermarker = new Watermarker("input.pptx"))
        {
            // Create an image watermark with transparency settings
            ImageWatermark imageWatermark = new ImageWatermark("logo.png");
            imageWatermark.Opacity = 0.3;
            imageWatermark.ScaleFactor = 0.5;
            imageWatermark.HorizontalAlignment = HorizontalAlignment.Center;
            imageWatermark.VerticalAlignment = VerticalAlignment.Center;

            // Add the watermark to all slides of the presentation
            watermarker.Add(imageWatermark);
            
            // Save the watermarked presentation
            watermarker.Save("output.pptx");
        }
    }
}

Tags

.NET Watermarking | PDF Watermarking | Batch Watermarking | Dynamic Watermark | Content-Aware Watermark | Watermark Removal | Watermark Detection | Watermark API | Cross-Platform .NET | Document Protection | PDF/A Watermark | Office® Watermarking | Image Watermarking | Metadata Watermarking | Watermark Layering | Digital Signatures | API Integration | High Performance Watermarking | Scalable Watermarking | NuGet Package | Cross-Platform