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PDF Grayscale Converter

Convert a color PDF to clean grayscale — great for printing and saving ink. Adjustable DPI and quality, fully client-side.

Drop a color PDF

PDF — up to 60 MB

Tip: you can also paste an image with ⌘V / Ctrl V

Resolution (150 DPI)

150 DPI is great for most prints. 300 DPI for high-quality output.

JPEG quality (85%)

Choose a PDF to preview it in grayscale.

How this works — and why it's private

Each page is rendered at your chosen resolution using pdfjs — right in the browser.
Pixels are converted to luminance grayscale (BT.601), then re-encoded as JPEG for a smaller file.
The pages are stitched into a new PDF with pdf-lib. Nothing is uploaded — your file stays on your device.

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