How to convert a PDF to black and white

Converting a PDF to grayscale removes colour from every page. It saves colour ink, gives scanned documents a uniform look, and can reduce file size.

Why go grayscale

• Cheaper printing on colour-charged printers.
• A consistent look across mixed-source scans.
• Smaller files when colour was not adding meaning.

It is not reversible

Grayscale discards colour information. Keep the colour original if you might need it back.