Click on " save" and once more on the " save" button to receive your edited pdf. select file or drop file here this tool can change background color of pdf and text color in pdf online. it is a great tool for pdf color changer changing background color and font color of pdf. it' s free, fast, online and easy to use. choose files maximum combined file size: 100mb, up to 50 files supported types: pdf, doc, docx, odt, ppt, pptx ( all files will be converted to pdf automatically) pdf to grayscale ( b/ w) converter free online tool for converting color pdf to black and white ( grayscale). draw, write, etc. a special tool is available to convert pdfs to black and white. try sejda desktop how to make a pdf grayscale below we show how to convert pdf files to black and white. the pdf color changing tool converts all the colors in a document to a continuum of a single color. by opening the " options" menu on the left. in case you’ re not sure what grayscale means, it’ s something that used to be in full colours and is now represented by a range of grey shades from white to black, as used in changer a monochrome display. you can zoom in and out on the page using the magnifying glasses buttons, undo changes, reset the whole page, and so on. change the color, font, stroke size, etc. upload pdf document and click convert. reasons to change pdf color include printing when you are out of black ink and matching a color scheme. on the full- size image of your pdf.