The E-Ink Manga Optimizer prepares comic page scans, light novel illustrations, and line art for crisp reading on electronic ink (E-Ink) reader displays.

### Why E-Ink Readers Need Custom Image Optimization Standard digital manga releases are formatted for color OLED and LCD tablets with continuous tone rendering. When displayed on 16-level grayscale E-Ink screens, fine ink hatching can wash out, and faint screentones can cause visual moiré patterns. This tool fits illustrations to exact hardware aspect ratios and sharpens inking lines: - **Kindle Paperwhite Preset**: Scales to $1236 \times 1648$ pixels (300 PPI display standard). - **Kindle Scribe Preset**: Scales to $1860 \times 2480$ pixels (large-format 10.2" canvas). - **Kobo Clara & Libra Preset**: Scales to $1264 \times 1680$ pixels (7" E-Ink Carta display). - **reMarkable 2 Preset**: Scales to $1404 \times 1872$ pixels (10.3" digital paper canvas). - **Line Contrast Tuning**: Darkens inking lines and cleans gray paper backgrounds to pure white (#FFFFFF), preventing ghosting during page turns.

### Worked Example Workflow 1. Upload a 2000×3000 pixel manga page scan. 2. Select the **Paperwhite** hardware preset ($1236 \times 1648$). 3. The image is scaled proportionally and centered against a pure white background. 4. Set Line Contrast to 70% to strengthen dialogue panel borders and character inking. 5. Download the optimized PNG for transfer to your e-reader or packaging into an EPUB/CBZ file.

### In-Browser Canvas Processing Image resizing, canvas padding, and contrast remapping run 100% locally on your computer via the HTML5 Canvas 2D API. No manga volumes, personal comic collections, or graphic assets are uploaded to any server.