# Grayscale PDF: Arthize vs PDFtk

_Updated July 2026 · Arthize · https://arthize.com/vs/pdftk/grayscale-pdf_

To convert a PDF to grayscale, Arthize offers a free, private grayscale pdf with no watermark — a focused alternative to PDFtk. Converting a PDF to grayscale removes colour from every page, which cuts file size and prepares a document for black-and-white printing.

## Arthize's grayscale pdf vs PDFtk

PDFtk is a command-line PDF toolkit. PDFtk is a free command-line tool for scripted PDF operations.

**Arthize's approach:** Converting a PDF to grayscale removes colour from every page, which cuts file size and prepares a document for black-and-white printing.

- A visual workspace instead of memorising command-line flags.
- 50+ tools live in one workspace, so you don't jump between single-purpose pages.
- Files are processed inside your private Arthize workspace and deleted after the job — never sold or used to train models.
- Handles conversion, OCR, signing and editing that PDFtk doesn't.

## How to convert a PDF to grayscale with Arthize

Grayscale conversion removes colour from every page.

It prepares documents for black-and-white printing.

It can reduce size on colour-heavy scans.

## How to convert a PDF to grayscale with Arthize

1. **Open the tool** — Sign in and open the grayscale tool.
2. **Add your PDF** — Upload the colour document.
3. **Convert** — Arthize converts all pages to grayscale.
4. **Download** — Get a grayscale PDF.

## FAQ

### Is Arthize a good PDFtk alternative to convert a PDF to grayscale?

Yes. Converting a PDF to grayscale removes colour from every page, which cuts file size and prepares a document for black-and-white printing. Arthize does it free with no watermark and deletes the file after the job. PDFtk is excellent for developers automating simple, repeatable PDF tasks from scripts.

### How do I convert a PDF to grayscale?

Converting a PDF to grayscale removes colour from every page, which cuts file size and prepares a document for black-and-white printing. On Arthize it's free with no watermark and processed privately.

### Will grayscale reduce my PDF's file size?

Converting a PDF to grayscale removes colour from every page, which cuts file size and prepares a document for black-and-white printing. On Arthize it's free with no watermark and processed privately.