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PDF · Grayscale · Free

Convert a PDF to grayscale

Strip the color from every page — useful for printing, scanning uniformity, or a smaller file.

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How to convert a PDF to grayscale

Upload your PDF and click "Convert to grayscale." Like Compress PDF, this works by re-rendering every page as an image — desaturating it to black & white — then rebuilding the PDF from those images. Text becomes part of a picture and is no longer selectable, so this is best for documents you're printing or archiving rather than ones you need to keep searchable.

The clearest use case is anything headed to a printer: a colored header, a highlighted table, or an embedded chart with colored bars will otherwise trigger a color print job at most print shops (usually charged per page at several times the black & white rate) even when the color adds nothing to what the reader actually needs.

Will my PDF's text still be selectable after converting to grayscale?
No. Like the Compress PDF tool, this works by re-rendering every page as an image (desaturated to grayscale) and rebuilding the PDF from those images, so text becomes part of a picture and is no longer selectable or searchable.
Why convert a PDF to grayscale?
The most common reason is printing cost — black & white printing is cheaper than color on most printers and print shops, and a document with a colored logo or highlighted sections will otherwise force a color print even if the color isn't essential to reading it.
Does grayscale reduce the file size too?
Often yes, somewhat, since a desaturated image can compress a little more efficiently than a color one — though the main effect here is dropping color, not shrinking the file. For file size specifically, use Compress PDF instead.
Is my PDF uploaded anywhere?
No — conversion happens locally in your browser using pdf.js and pdf-lib. Your eyes only — we never get a look.

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