Turn a color PDF into grayscale to save ink when printing or to meet submission rules.
Pages are turned into grayscale images, so text in the new PDF can't be selected.
The file is too big afterwards? Use Compress PDF. For photos, use the black & white photo converter.
To save color ink when printing, to meet submission rules that ask for black-and-white documents, or to check how a document looks when printed on a black-and-white printer.
No. Each page is redrawn as a grayscale image, so text can no longer be selected or searched. Keep the original if you need that.
150 DPI is clear for printing text documents and keeps the file small. Choose 200 DPI for documents with small print or detailed images.
No. The conversion happens in your browser.