Category Archive: GroupDocs.Watermark Product Family

Official blog with announcements of latest supported features, hot fixes, technical articles, tips and videos of GroupDocs.Watermark – A document watermarking API for .NET.

Add Watermark to Presentation Slides using C#

Watermarks are normally used to protect the documents from any unauthorized use. To protect your presentations and to claim ownership, today we will learn how to programmatically add text and image watermarks to the Microsoft PowerPoint presentations within .NET applications using C#. In a separate article, we have seen applying watermarks to images in C#.

The following topic are separately and briefly covered in this artile:

  • Add text watermarks to presentation slides.
  • Add image watermarks to presentation slides.

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Add Watermark to Images using C#

Add Text Watermark to PNG image using Java and .NET

Let's see today, how to add watermarks to images. This helps you branding your official photography, and protects your pictures from any unauthorized use. This article will guide you to programmatically add text and images watermarks to your image files using C#. In an earlier post, we have seen the same to add text and image based watermarks to images using Java. After reading this article, it will not be difficult for you to add watermarks to JPG/JPEG, PNG, WebP, GIF, TIFF, JP2, BMP images using C# within your .NET application.

Let's now separately see, how we can easily add text and image-based watermarks on your pictures, photos, or image files in C# using the .NET Watermarking API for documents and images.

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Find and Remove Watermarks from Documents in Java

This article is useful for Java developers who are looking for a way to find and remove text or image watermarks from PDF, Word, Excel, PowerPoint, and Visio documents. In one of our posts we have learnt finding and removing watermarks from documents in C#. Let's now jump to quickly see a little about a Java API that allows adding, finding and removing watermarks from various documents in different ways.

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Find and Remove Watermarks from Documents in C#

Today, we will have a look at how to find and remove watermarks from documents in C#. There can be text and image-based watermarks in a document. We can easily search and programmatically remove such watermarks from many PDF, Word, Excel, PowerPoint, and Visio supported documents.

Following topics will be covered in this article:

  • .NET API for removing watermarks
  • Find watermarks in documents using C#
  • Remove watermarks from documents in C#
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Add Watermark to Images in Java

In this article, we will learn to add text and image watermarks to images using Java. There can be two ways to add watermark to images. Either you want to add the watermark with the personalized text or add an image watermark over the source image. We will see both scenarios. Currently, in addition to the JPG and PNG, this Java API supports BMP, GIF, JP2, TIFF & WebP image formats for adding watermarks on it. We can also change the style, orientation, and appearance of the watermark text.

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Watermark Password Protected Documents using GroupDocs.Watermark for .NET 19.11

C# .NET Watermarking API

Another month, another release! GroupDocs.Watermark for .NET 19.11 has been released with 4 improvements and 1 bug fix. So in this article, I’ll give you a brief overview of each improvement and fix we have included in the latest release.

First of all, let’s begin with the improvements and then see what has been fixed in v19.11.

Adding Watermark to Password Protected Documents

GroupDocs.Watermark already supports adding watermark to the password protected documents. However, we have improved and simplified the … Continue Reading

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How To Remove Watermark from PDF Documents using C#

Remove Watermark from PDF in C# – If you are looking to create an application to delete watermark from a PDF document. This article is a good learning source for C# programming developers.

Significance of Removing Watermarks from PDF documents

Remove Watermark from PDF

Watermark importance is very high for all those who intend to ascertain their copyrights if in case their data gets copied somewhere. The information contained within the watermark designates the authority of the owner and prevents other users from deleting … Continue Reading

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Lock Watermarks in Word Documents using C#

Watermarking is a famous way of adding labels to the documents that may indicate the state of the document such as draft, confidential, etc. It can be used to add a company’s logo behind the text of the document to avoid the ownership dispute. In some cases, people add watermarks to the documents to protect the content. But, are you sure that the content is protected and no one can remove those watermarks? There is no guarantee because various third-party … Continue Reading

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Introducing a More Optimized and Simplified GroupDocs.Watermark for .NET API

It’s been quite long since we released the last version of GroupDocs.Watermark for .NET API. The reason behind this gap was to introduce a more simplified and optimized watermark manipulation API for the .NET platform. Today, I am excited to announce that the API v2 of GroupDocs.Watermark for .NET has been released as v19.10 and it is available for download.

What’s new in the latest release?

The major updates have been done at the architecture level of the API … Continue Reading

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Add Watermark to a Batch of Documents and Images in .NET and Java

Watermarking is a popular technique to indicate that the content or data inside a document is copyrighted. On the other hand, it is also used to place the company’s logo or some kind of label in the documents before they are shared within or outside the company. However, it is quite hard to apply the watermark to a bunch of documents one by one. It becomes harder if you have documents of various formats such as PDF, DOCX, PPTX, XLSX, … Continue Reading

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