PDFSlick

Grayscale PDF

Convert a colour PDF to black and white — smaller file, cheaper to print.

How it works

  1. 1

    Upload your PDF

    Drop a colour PDF onto the upload area.

  2. 2

    Click 'Convert to Grayscale'

    Your file is uploaded, converted using Ghostscript, and the download starts automatically.

  3. 3

    Done

    Your file is deleted from the server immediately after download.

Processed securely, deleted within 1 hour

Files are transferred over HTTPS, assigned a random ID, processed on our servers, and automatically deleted within 60 minutes. We never log file contents.

Frequently asked questions

How much smaller will the grayscale PDF be?

Typically 20–40% smaller, depending on how many colour images the PDF contains. Text-heavy PDFs see less reduction.

Is the text still readable?

Yes. All text, images, and graphics are preserved — just converted from colour to shades of grey.

Is my file safe?

Files are transferred over HTTPS and deleted from our server immediately after your download.

Can I convert only some pages to grayscale?

Not with this tool — it converts all pages. For selective editing, use the PDF Editor.