Add Watermark to PDF Free | Interactive Drag & Drop Stamper

1. Select Target PDF

Click here to choose a PDF file

2. Configure Watermark

Placement Position

Rotation Angle: 45°

Size / Scale: 100%

Pages to Watermark

Watermark Text

Font Style

Text Color

Opacity: 50%

Upload Logo (PNG or JPG)

Choose Image

Image Opacity: 50%

Real-time Preview

Upload a PDF to see how the watermark looks instantly.

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How to Add a Watermark to a PDF Online

Interactive Drag & Drop

Experience our next-generation Real-time Preview Engine. Drag the watermark with your mouse, adjust rotation (0-360°), change font styles, or scale the size—all changes reflect instantly on the live canvas.

Mosaic Anti-Theft

Need maximum protection? Use our Mosaic (Tile) mode to automatically repeat your logo or text across the entire PDF page. Combine it with precise Page Range selection (e.g., First Page Only or Odd Pages).

100% Client-Side Privacy

Your highly sensitive documents never leave your computer. All processing, rendering, and stamping happens locally inside your web browser. We do not upload or store your files anywhere.

Why Watermark PDFs?

Protect Intellectual Property: Deter plagiarism and unauthorized sharing by stamping your company logo across your documents.
Document Status: Clearly mark documents as "DRAFT", "APPROVED", or "VOID" so your team knows their exact status.
Free & No Registration: Add watermarks to unlimited PDF files completely free of charge. No signup required.

Watermark PDF