What is GroupDocs.Watermark?
GroupDocs.Watermark for .NET is a powerfull API for managing watermarks in the various documents formats such as PDF, DOCX/DOC/RTF, PPTX/PPT, XLSX/XLS, JPG, PNG, TIFF, GIF and many others.
With GroupDocs.Watermark for .NET you can add watermarks that are hard to be automatically removed by third-party tools, search and remove previously added watermarks of popular types (including watermarks added by third-party tools) in a document.
Why use GroupDocs.Watermark?
No additional software is required;
Fast and efficient document watermarking API;
Adding/removing watermarks to/from a particular section or whole document;
Attach watermark to all images in a particular section, page, slide, or document;
Assign watermark to only particular frames of a multi-framed image;
Allocate hidden watermark to PDF that only appears when printing document;
Set watermark to all attachments in an excel document & all image shapes in presentation;
Place watermark or remove it from the background images of spreadsheet or presentation;
Employ watermark to supported files in all attachments of an email or PDF document;
Apply or remove watermark as XObjects, artifacts & annotations in PDF documents;
Eliminate watermark containing text with particular formatting;
Look for image watermarks that resemble a particular image;
Identify text watermark even if there are unreadable characters between letters;
Search watermarks based on specific parameters or by combining multiple criteria;
Specify font formatting to look for matching text watermark;
Programmatically extract page setup & other information for supported formats;
Add watermark to images inside any header & footer in supported document formats;
Add watermark to image shapes in a word document & lock watermarks to restrict editing;
Protect text watermark using unreadable characters in presentations;
Rasterize particular page or whole PDF document to protect added watermarks;
Change text formatting while replacing existing text watermark;
Align watermark to bleed box, art box, crop box, or trim box in PDF document.