Convert a colour PDF to grayscale (black & white) online for free. Great for cheaper printing and smaller file sizes — powered by Ghostscript on our server.
Colour printing is expensive and colour PDFs are larger than they need to be. Grayscale PDF converts your document to clean black and white, which cuts printing costs, shrinks the file, and looks tidy for documents that don't need colour.
Drop your PDF onto the Grayscale PDF tool above, or click to browse and pick it from your device.
KOIAE removes all colour while keeping the text and images sharp and legible.
Download a black & white PDF in one click. Any files you upload are deleted automatically afterwards.
Yes — Grayscale PDF is free. There is no account to create, no watermark on your files, and generous daily limits for everyday use.
Drop files here or click to browse