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Add a Watermark in Word with NET REST API

This article shows how to Java developers can use the REST API to insert a watermark into a Word document — specifically a DOCX file—by leveraging the Aspose.Words for Java Cloud SDK. Various properties are covered to control the watermark’s text, formatting, and layout.

Prerequisite

Steps to Insert a Watermark in Word with Java Low Code API

  1. Create the WordsApi object by providing the client ID/secret to insert a watermark.
  2. Create the WatermarkDataText object and set its basic parameters.
  3. Instantiate the InsertWatermarkRequest using the input Word file and the watermark object.
  4. Call the InsertWatermark method using the defined request object.
  5. Download the resultant Word file using the destination file name specified in the InsertWatermarkRequest.
  6. Retrieve the output Word file that now contains the watermark.

These steps illustrate how to insert a watermark in Word with Java Low Code API. Begin by creating a WatermarkDataText instance to define the text, formatting, and layout of the watermark, then pass this object to InsertWatermarkRequest, which is finally used with WordsApi.InsertWatermark().

Code to Insert Draft Watermark in Word with Java REST API

The sample demonstrates how to put a watermark in Word with Java REST API. You can set the Layout property to diagonal or horizontal, enable semi‑transparency, and choose the watermark color. The processed file is stored in the cloud and can be downloaded via the DownloadFile() method.

In this topic, we covered the process of adding watermarks in Word. If you need to add page numbers to a Word document, see the related article: Add a page number in Word with Java REST API.

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