PDF to Grayscale
Convert a color PDF to grayscale free — turn selected pages or the whole document black-and-white for cheaper printing. Private, in your browser.
About the PDF to Grayscale
Turn a colour PDF into a clean grayscale version — ideal for black-and-white printing, cutting ink costs, or standardising documents. Convert the whole file or just a page range, and choose a render quality to balance sharpness against file size.
Each page is rendered and converted to true grayscale using the standard luminosity formula, then rebuilt into a new PDF. Because pages are rasterised in the process, the result prints consistently on any printer, though its text is no longer selectable.
The conversion runs entirely on your device with pdf.js and pdf-lib — nothing is uploaded. There are no watermarks, no limits and no sign-up.
How to Use the PDF to Grayscale
- 1Upload the PDF you want to convert.
- 2Optionally set which pages to convert, and pick a render quality.
- 3Click Convert to Grayscale.
- 4Download the grayscale PDF.
Frequently Asked Questions
Why is the text no longer selectable after converting?
Grayscale conversion works by rendering each page to an image and desaturating it, so the finished pages are pictures rather than live text. That guarantees a consistent black-and-white result but means text can't be selected or searched. Keep the original if you still need selectable text.
Can I convert only some pages?
Yes. Enter a range such as 1-3,7 to grayscale just those pages; the rest keep their original colour. Leave the field blank to convert the entire document.
Will grayscale make the file smaller?
Often, yes, since colour information is dropped and pages are re-encoded, but the exact size depends on the render quality you choose and how image-heavy the pages are. Lower quality yields smaller files.
Is my PDF uploaded?
No. Rendering and conversion happen entirely in your browser, so the document never leaves your device.