Spire.PDFConverter allows users to add watermark after converting to PDF. The following steps will guide you how to add PDF watermark by using Spire.PDFConverter.

Step 1: Download Spire.PDFConverter Install and Run

Step 2: Add Files

Click add file and choose the document which you want to convert and add watermark.

Step 3: Add PDF Watermark

Click Add Watermark and then a window pops up. If select Text Watermark, enter text. If select Image Watermark, click "Browse" to choose images. Then click "Watermark"

Step 4: Convert to PDF

Click "Convert". And the document will be converted to PDF with watermark added.