KissPDF Free Grayscale PDF Converter
Create a grayscale copy of a color PDF for printing and sharing. Convert supported text to natural gray shades or solid black, convert embedded images to grayscale, and download a separate copy.
A grayscale copy removes color from converted content while retaining brightness differences in headings, charts, diagrams, and photographs.
PDF.js and a local WASM engine process the selected PDF bytes in browser memory.
Choose one PDF, set how text and images should be handled, and download the converted copy.
Drop one PDF on the page or select it from your device.
Keep natural gray shades or convert supported colored text to solid black.
Convert embedded images to grayscale or keep their original colors, then enable compression only if needed.
Process the document locally and save the new grayscale copy when it is ready.
Practical guide
Convert a color PDF to grayscale online for free while controlling how supported text and embedded images are handled. Choose natural gray shades or solid-black text, convert images to grayscale or preserve their colors, and optionally compress large images. Processing happens locally in the browser.
Grayscale keeps brightness differences in supported colored text, producing natural gray shades. Black and White converts supported colored text to solid black for stronger printed contrast. This text setting does not turn photographs into pure black-and-white pixels; embedded images follow their own conversion setting.
Choose Grayscale under image conversion to remove color from embedded photographs and artwork. Choose None when photographs, logos, or brand colors should remain unchanged. The PDF is rewritten instead of turning every page into a screenshot, so ordinary text remains searchable and page dimensions stay the same.
A grayscale PDF removes color information from converted content, but the printer controls which ink cartridges are used. Select grayscale or black-and-white output in the print dialog when black-only printing is required. Removing image color can make some files smaller, but conversion alone does not guarantee a size reduction.
PDF.js and a local WASM engine process the selected file in browser memory. The document is not sent to a document-processing API. Some advanced structures may be normalized during rewriting, and any existing digital signature becomes invalid.
Clear answers based on how this tool actually works.
Select one PDF, choose how supported text and embedded images should be converted, and start processing. KissPDF creates a separate grayscale copy for download.
Yes. Grayscale is the common US spelling and greyscale is a common UK spelling. Both describe shades between black and white without the original colors.
Yes. Choose Black and White under text conversion to turn supported colored text into solid black. Embedded images still follow the separate image conversion setting.
No. Black and White converts supported colored text to solid black. Embedded images are either converted to grayscale or preserved in color according to the image conversion setting.
Yes. Choose Grayscale under image conversion to remove color from embedded photographs and artwork.
No. PDF.js and the WASM conversion engine process the selected document locally in your browser.
Ordinary text remains text because pages are not rasterized. Complex fonts or PDF constructs may still be normalized when the document is rewritten.
Yes. Choose None under image conversion. Embedded images remain in their original colors while the rest of the document is processed.
Not necessarily. The printer driver controls which cartridges are used. Select grayscale or black-and-white output in the print dialog when black-only printing is required.
It downsamples large images to 144 DPI and applies balanced JPEG compression. Leave it off when maximum image fidelity matters.
No. Removing color may reduce some image-heavy files, but document rewriting can also produce a similar or larger result. Enable image compression when size reduction matters.
No. Rewriting a signed PDF invalidates its existing byte-level digital signature. Keep the signed or archival original and convert a working copy.