Use Grayscale PDF - free
Frequently asked questions
Will the text still be selectable after conversion?
Grayscale conversion renders pages to images, so text in the output will not be selectable. Run OCR afterwards if searchability is needed.
Does grayscale conversion reduce file size?
Yes, typically significantly. Colour image data is replaced with single-channel grayscale data, which compresses more efficiently.
Can I convert only specific pages to grayscale?
The current tool converts all pages uniformly. For selective page conversion, use the Organize PDF tool to extract the pages you want, convert them, then merge back.