PDF Watermark

😫 The Pain Point

You’re sharing a confidential draft with clients but need to mark it “CONFIDENTIAL” on every page. Doing this manually in Adobe Acrobat takes forever.

🚀 Agentic Solution

An Automatic PDF Watermarker that stamps every page with text or your logo.

Key Features:

• Text Watermarks: Diagonal “DRAFT” or “CONFIDENTIAL” stamps.
• Image Watermarks: Your company logo with opacity control.
• Position Control: Center, corners, or custom coordinates.

⚔️ Phase 1: Commander (Quick Fix)

For quick watermarking.

Prompt:

“I have a PDF report.pdf. Write a Python script using pypdf and reportlab to:

1. Text Watermark: Add ‘CONFIDENTIAL’ diagonally across each page.
2. Style: Gray color, 50% opacity, large font.
3. Output: Save as report_watermarked.pdf.

Print progress. Handle encrypted PDFs (skip with warning).”

Result: Protected documents ready for distribution.

🏗️ Phase 2: Architect (Permanent Tool)

For Legal/Compliance Teams.

Engineering Prompt:

**Role:** Python GUI Developer (PyQt6 Specialist)
**Task:** Create "PDF Watermark Pro" Desktop App

**Objective:** A batch stamping tool to apply text or image watermarks securely.

**Tech Stack:**
* Language: Python 3.10+
* GUI Library: PyQt6 (Cross-platform)
* PDF Engine: PyPDF2, reportlab
* Packaging: PyInstaller

**Functional Requirements:**
1.  **UI Layout (PyQt6):**
    *   **Input:** Source PDF/Folder.
    *   **Mode:** Tabs for "Text Watermark" vs "Image Watermark".
    *   **Text Ctrl:** Input field, Font, Size, Color, Rotation (0-360).
    *   **Image Ctrl:** File Picker, Scale Slider, Opacity Slider.
    *   **Position:** 3x3 Grid (Top-Left...Bottom-Right) or Center.

2.  **Core Logic:**
    *   Generate watermark PDF page using `reportlab`.
    *   Merge watermark layer onto every page of source docs.
    *   **Threading:** Processing loop runs in background.

3.  **Deliverables:**
    *   `main.py`: Complete source code.
    *   `requirements.txt`: Dependencies.
    *   **Build Instructions:**
        *   Windows: `pyinstaller --onefile --noconsole main.py`
        *   macOS: `pyinstaller --windowed --noconsole main.py`

🧠 Prompt Decoding

• reportlab: Creates the watermark as a PDF layer. pypdf merges it onto each page.

🛠️ Instructions

1. Install: pip install pypdf reportlab
2. Copy Prompt → Run.