1PDF

Black & white

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Make scanned pages grayscale or pure black and white.

Drop your PDFs here

PDF files · up to 50 MB each

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Processed on your device.

Saved workspaces on this device

Files are saved only when you choose Save. Up to 5 workspaces and 200 MB total. Browser storage may be cleared; download important files separately.

    How it works

    1. 1Choose your PDF file.
    2. 2Choose grayscale or a threshold, a resolution and pages.
    3. 3Download the converted PDF.

    Originals stay unchanged. Save results before leaving, or explicitly save this workspace on your device. Manipulation tools require unlocked, flattened PDFs. Layout changes require pages without annotations or links. New outputs may lose bookmarks and digital signatures.