PDF Watermark Tool

A simple web-based PDF watermark tool built with Python and Streamlit.

Upload a PDF, customize watermark text and styling, then download the processed file.

Features

• Upload PDF files
• Add tiled text watermarks
• Customize watermark text
• Adjust font size
• Adjust opacity
• Change watermark color
• Control horizontal / vertical spacing
• Offset tiling for better coverage
• Auto-download as original_filename-watermark.pdf

Tech Stack

• Python
• Streamlit
• PyMuPDF
• Pillow

Run Locally

Install dependencies:

pip install -r requirements.txt

Start the app:

streamlit run WaterMarkMaker.py

Usage

1. Upload a PDF
2. Set watermark text and style
3. Click Generate PDF
4. Download the processed file

Deployment

This app can be deployed easily on Streamlit Cloud.

Notes

• Supports Chinese watermark text
• Built-in Chinese font included
• Works on desktop and mobile browsers