PDF to Greyscale
Convert a colour PDF to greyscale to reduce printing costs and file size, while keeping the text fully selectable and searchable.
Upload PDF File
About This Tool
Colour printing costs several times what greyscale does, and a print queue that detects any colour on the page will bill the whole job at the colour rate - even if the only colour is a blue hyperlink in the footer.
Converting to greyscale removes that. Colours are mapped to their luminance values, so the page keeps its tonal structure while containing no colour at all. Printers charge the mono rate, and file size usually drops too.
The text layer is not touched. Search, copy and accessibility tools work exactly as they did - this is a colour conversion, not a rasterising step.
How to Use
Add your PDFs
Drop in up to 10 files.
Convert
Colours are mapped to greyscale across the whole document.
Check the contrast
Review the preview. Colours of similar lightness can become hard to distinguish once desaturated.
Download
Save the greyscale PDF.
Use Cases
Bulk printing
A 200-page document printed at mono rates rather than colour, because there is no colour left to detect.
Fax and scan workflows
Systems that are monochrome anyway handle a greyscale source more predictably.
Smaller files
Dropping colour channels typically reduces size, especially on image-heavy pages.
Frequently Asked Questions
Is the text still searchable?
Yes. Only colour values change; the text layer is untouched.
Can I convert it back to colour?
No. Colour information is discarded, so keep your original if you might need it.
What happens to charts that rely on colour coding?
Series with similar lightness can become indistinguishable. Check the result, and consider adding patterns or labels before converting.
How much smaller will the file be?
Often 20 to 40 percent for image-heavy documents. Text-only files change very little.