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Redact a PDF: black out data for good

Permanently hide ID numbers and other details

Up to 200 MB at a time. On a phone, large documents take longer and need more memory.

Every page is redrawn as an image of up to 144 dpi, 4 megapixels at most. Text, attachments, links, forms and metadata from the original are left out. The black areas contain none of the original data.

    Your file stays on your device. No sign-up, no limits.

    Redacting a PDF here removes the details you choose so they don’t exist even under the black box. Mark the areas, and the tool redraws every page as an image and fills those areas black before writing the new file. Text, attachments, links and metadata from the original are left out, so the result is no longer searchable.

    How it works

    A black rectangle drawn in an ordinary PDF editor only covers the text, which can still be selected and copied underneath. That can’t happen here, because the new file holds none of the original text. Leave a millimetre or two of margin around each detail. Then zoom in.

    “Find sensitive data” can suggest things like ID numbers and account numbers. Untick anything you want to keep.

    Worked example

    You’re sending your employer a bank statement as proof of a payment, and you don’t want them to see your other transactions or your balance. Mark those lines, check the black boxes in the zoomed preview and send only the new copy.

    Questions people ask

    Can text under the black box be copied?

    No. Not from this result. The black area is part of a new image, and the original text isn’t in the file.

    Why do all pages become images, not just the redacted ones?

    That way nothing hidden from the original gets through: no text, no attachments, no metadata.

    How do I hide a JMBG on a Serbian document?

    The JMBG (the 13-digit personal ID number) is on ID cards, payslips and contracts. Use “Find sensitive data” or mark it by hand, then check the preview before sharing.

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    Updated: 13 November 2026