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FileSwitch guide
How to Convert a PDF to Black and White
Turn a colour PDF into grayscale to save ink, reduce size, and standardise printing.
Updated July 24, 2026
Why go grayscale
Converting a PDF to black and white removes colour information. That saves printer ink, often shrinks the file, and gives a consistent look for documents that do not need colour.
How to convert to grayscale
Upload your colour PDF to the grayscale tool.
Convert it to black and white.
Download the grayscale PDF.
When it helps
Printing long documents cheaply.
Standardising scanned forms and contracts.
Reducing size when colour adds nothing useful.
Keep the colour original
Grayscale is a one-way change — you cannot bring the original colours back from the black-and-white file. Keep your colour version in case you need it later.