Question 1

How does this work?

Accepted Answer

We render each PDF page to a canvas, apply a grayscale CSS filter, then re-create the PDF using pdf-lib.

Question 2

Is my PDF uploaded?

Accepted Answer

No, everything happens locally in your browser.

Question 3

Does it reduce file size?

Accepted Answer

It may slightly reduce or increase size depending on the content. Grayscale images generally compress better.

⬛ PDF Grayscale Converter

❓ Frequently Asked Questions