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 Tool Developer
**Task:** Create a "PDF Watermark Tool".

**Requirements:**
1.  **GUI:**
    *   Select PDF or folder.
    *   Mode: Text or Image watermark.
    *   Text: Input, font, size, color.
    *   Image: file picker, scale, opacity.
    *   Position dropdown (center, corners, diagonal).
    *   Preview first page.
    *   Progress bar.

2.  **Logic:**
    *   Create watermark layer with reportlab.
    *   Merge with each page using pypdf.
    *   Preserve original PDF structure.

3.  **Deliverables:**
    *   `pdf_watermark.py`
    *   `run.bat`, `run.sh`
    *   `requirements.txt`

🧠 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.