The Core Differences: JPG vs PNG
Both formats are standard on the web, but they utilize vastly different compression mechanisms:
JPG (Joint Photographic Experts Group)
JPG utilizes **lossy compression**, making it highly optimal for photographs, realistic gradients, and complex scans. It excels at keeping file sizes small, but it does not support alpha-channel transparency and can introduce fuzzy artifacts around high-contrast text outlines.
PNG (Portable Network Graphics)
PNG utilizes **lossless compression** and supports full alpha-channel transparency. It is the absolute standard for computer screenshots, design mockups, company logos, and diagrams containing high-contrast text. However, PNG photo files can carry significant weight, leading to oversized PDFs.
Fidelity & Size Matrix
- Use PNG to PDF if: You are compiling software screenshots, vector logos, or blueprints containing small text details where outlines must remain perfectly crisp.
- Use JPG to PDF if: You are combining realistic scanned photos, portfolios, or document sheets where small file sizes are preferred.