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Convert a PDF to grayscale — without uploading

Turn a color PDF into clean black-and-white on your own device. Great for printing, often smaller too.

100% private — files never leave your device

How it works

  1. 1

    Drop a PDF file.

  2. 2

    The engine converts all colors to grayscale on your device.

  3. 3

    Compare sizes and download the result.

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Frequently asked questions

Is my PDF uploaded to convert it to grayscale?

No. The conversion runs on your device with Ghostscript WebAssembly — the file never leaves your browser.

Why convert a PDF to grayscale?

Predictable black-and-white printing (no muddy color conversions at the printer), often smaller files, and a uniform look for scanned or mixed documents.

Does it change text quality?

No — text and vector graphics stay sharp. Only the colors are converted to shades of gray.