How to Make a PDF Black and White (Grayscale) Online for Printing & Filing

Published: 2026-02-21 | Read Time: 4 min read

Learn how converting color PDF documents and scans to pure black and white reduces file size by up to 90%, improves printer contrast, and meets legal submission rules.

Frequently Asked Questions

Is a grayscale PDF the same as 1-bit black and white?

Grayscale retains 256 shades of gray suitable for photographs, whereas 1-bit black and white thresholding converts pixels strictly to pure black or pure white, ideal for text documents.