PDF compression relies on image optimization. In this guide, we analyze the relationship between DPI (Dots Per Inch) and JPEG image quality configurations.
DPI Resolution Spans
- 72 DPI (Screen): Suitable for web views. Maximum file savings but not ideal for print.
- 150 DPI (Ebook): Standard layout display for mobile devices. Balanced quality and file size.
- 300 DPI (Printer): The standard print resolution. Delivers high quality at larger file sizes.
JPEG Quality Ratios
Adjusting compression parameters (from 0.30 to 0.90) controls the lossy compression ratio. Combining 150 DPI and 0.65 quality delivers optimal client-side results.