# Auto-Scrolling Webpage Capture to PDF

GitHub: 0xarchit/Scroll-To-Pdf

A desktop application built with PyQt6 that automatically scrolls through a webpage, captures screenshots, stitches them, and exports the result as a multi-page PDF.

When you need a PDF of an entire webpage (including content below the fold), manual scrolling and screenshotting is tedious. AutoScrollCapturePDF automates:

1. Scrolling through the page
2. Taking successive screenshots
3. Detecting end of page via image similarity
4. Concatenating and saving as PDF

Ideal for long articles, reports, dashboards, and documentation pages.

• Configurable scroll delay, height, and max scroll count
• Automatic end-of-page detection (image similarity threshold)
• Preview stitched result before export
• Primary and fallback PDF export methods (Pillow and img2pdf)
• Dark-themed, responsive PyQt6 GUI
• Cross-platform (Windows/macOS/Linux)

1. Clone this repository:

   git clone https://github.com/0xarchit/Scroll-To-Pdf.git
   cd ScreenShotToPdf

2. (Optional) Create a virtual environment:

   python -m venv .venv
   .venv\Scripts\activate   # Windows
   source .venv/bin/activate  # macOS/Linux

3. Install dependencies:

   pip install -r requirements.txt

4. Ensure app_icon.ico sits alongside main.py in the project root.

python main.py

The main window appears. Adjust settings then click Start Capture.

1. Click Start Capture → 3‑second countdown → window minimizes
2. Focus browser and let it scroll+capture automatically
3. Status bar displays live updates and screenshot count
4. Capture stops on page end or reaching max scrolls
5. Window restores with Preview, Save, and Clear options

Click Preview Screenshots to open a stitched image of all screenshots. Close preview to return.

1. Click Save as PDF
2. Choose destination file path (.pdf)
3. Application attempts Pillow export; on failure, uses img2pdf fallback

• main.py: GUI, settings, thread orchestration
• CaptureThread: Runs scrolling & screenshot logic on background thread
• Image Similarity: Grayscale thumbnails compared to detect end of page
• PDF Export: Multi-page via Pillow or img2pdf fallback

1. Initial Delay: 3 seconds to switch focus to browser
2. Scroll Loop:
   • Grab full-screen screenshot
   • Compare with previous (100×100 grayscale threshold)
   • If similar beyond 95%, capture final part and exit
   • Else, scroll down by configured height and repeat
3. Signal UI: screenshot_taken, status_update, capture_complete signals update progress

This project includes a PyInstaller spec (main.spec):

pip install pyinstaller
pyinstaller main.spec

Look under dist/ or build/ for the generated executable.

• Blank screenshots: Ensure browser window is not minimized and is in focus.
• OCR or hidden UI elements: Use headless capture libraries or adjust scroll offsets.
• Permission errors: On macOS, grant screen recording privileges.
• PDF Export fails: Install img2pdf via pip install img2pdf.

Q: Can I capture only part of a page?

A: Not currently; feature coming soon (scroll region selection).

Q: Why are some screenshots repeated?

A: Overlapping scroll height may cause repeats. Increase delay or adjust scroll height.

Q: How do I change similarity threshold?

A: Hardcoded to 0.95; modify images_are_similar() in CaptureThread.

1. Fork the repo
2. Create a feature branch (git checkout -b feature/YourFeature)
3. Commit your changes (git commit -m 'Add feature')
4. Push to your branch (git push origin feature/YourFeature)
5. Open a Pull Request

Please follow PEP8 and include tests for new functionality.

This project is licensed under the MIT License. See LICENSE for details.