e-Ink Reader Optimizer
Optimize PDFs for e-Ink screens via background clearing, Otsu binarization, and morphological text dilation.
e-Ink Contrast Optimizer
Drag and drop your PDF e-book here to optimize for e-Ink paper contrast.
Upload Scanned PDF
Drag and drop your PDF e-book here to optimize for e-Ink paper contrast.
You May Also Like
Compress PDF
Reduce PDF file size while maintaining quality. Free online PDF compressor for smaller files.
PDF to Greyscale
Convert color PDF to greyscale. Reduce file size and prepare for black-and-white printing.
Rasterize PDF
Convert PDF pages to high-quality images. Export as PNG, JPEG, or WebP with custom DPI settings.
How to Use
Upload Scanned PDF
Upload e-books or scanned documents with faint text or gray backgrounds.
Adjust Contrast Slider
Drag the damped slider to balance background removal and character bolding in real-time.
Optimize and Download
Process the entire PDF to generate a high-contrast, eye-friendly document tailored for e-Ink.
Everything You Need to Know About e-Ink Reader Optimizer
Got questions about file security, features, or conversions? Find quick answers below.
In image processing, this is called dilation. It uses a structuring matrix to expand character margins by a pixel, physically thickening faint strokes to make them legible.
Have additional questions or custom needs?
Our team is here to assist you with PDF tools, custom requests, and feature suggestions.
Latest Articles & Guides
Tips, workflows, and in-depth guides to master your PDF documents.