About the Convert PDF to Grayscale
Print shops often charge more for color, and some submissions require grayscale. This tool renders every page with PDF.js, converts it to grayscale using perceptual luminance and rebuilds the PDF.
Because pages become images, text is no longer selectable — the tool tells you this up front so you can decide.
How to use it
- Open a PDF.
- Pick the output quality (150 DPI for screen, 300 for print).
- Convert and download.
Good to know
- Output pages are JPEG images; text selection and search are lost.
- Documents are limited to 500 pages.
- If you need a vector grayscale PDF, use a desktop tool such as Ghostscript.