PDF Watermark is a free online tool for adding text or image watermarks to PDF files with customizable position, opacity, rotation, and tiling. All processing runs locally in your browser.
What is PDF Watermark?
Add text or image watermarks to your PDF files directly in the browser. Choose between single placement or tiled patterns, adjust font, color, opacity, rotation, and position. No data is uploaded — all processing uses the pdf-lib library.
How to Add a Watermark to a PDF
- 1
Upload a PDF
Drag and drop a PDF file onto the drop zone, or click to browse. The file stays in your browser.
- 2
Configure your watermark
Choose between text or image watermark. Adjust font, size, color, opacity, and position. Use tiled mode for copyright protection with repeated watermarks across all pages.
- 3
Download
Preview the watermarked first page in real-time, then download the watermarked PDF with the watermark applied to all pages.