Choose a PDF or drag it herePDF
Processed in your browser. Nothing is sent to a server.
Turn a colour PDF into greyscale or pure black and white — cheaper to print and lighter to send. The conversion runs in your browser.
Convert colored PDF documents to monochrome or grayscale to save printer ink and toner.
Free · Local · works offline · PDF → GRAYSCALE · B&W
Frequently asked questions
- Does converting to grayscale make the file smaller?
- Usually yes, noticeably so for image-heavy documents, because three colour channels collapse into one. A text-only PDF barely changes, since its size is mostly fonts.
- Will this stop my printer using colour ink?
- It removes the colour from the file, which is the reliable half. Some drivers still run a colour pass out of habit, so also select the printer's own black-and-white or grayscale setting in the print dialog.
- What is the difference between grayscale and black-and-white?
- Grayscale keeps the full range of greys, so photographs still look like photographs. Pure black-and-white forces every pixel to one or the other, which is right for line drawings and scanned text but destroys a photo.
- Can I get the colour back afterwards?
- Not from the converted file — the colour information is discarded, not hidden. Keep the original, which is why the tool exports a new document rather than overwriting anything.