pdf2png — PDF to Vertically Concatenated PNG

Convert multi-page PDF files into a single tall PNG image. All pages are rendered at 2x scale (Retina quality) and stitched vertically. Uses macOS CoreGraphics directly — no pdftoppm, no ImageMagick, no Ghostscript.

When to Use

• User wants to convert a PDF to a single PNG image
• User needs a long screenshot-style image of a PDF
• User wants to share PDF content as an image (WeChat, social media, etc.)

Workflow

Step 1: Identify PDF files

Locate the PDF file(s) the user wants to convert. If multiple PDFs or output location choices are ambiguous, use AskUserQuestion to confirm the path(s) before running conversion.