Black out sensitive information and permanently remove the content underneath, free and in your browser. Nanodoc does not just draw a box over the text: it deletes the underlying content and then re-checks the region to verify the text is actually gone. If a PDF's structure defeats redaction, Nanodoc tells you instead of pretending it worked.
No sign-up required • No watermark • Files never leave your device
Open the free editor and load your PDF.
Select the Redact tool from the toolbar.
Draw over every region you want removed.
Apply the redactions. Nanodoc removes the content and verifies the text is gone.
Download the redacted PDF.
Really removed. Drawing a black rectangle over text leaves the text selectable and searchable underneath, which has caused real-world data leaks. Nanodoc applies true redaction that deletes the underlying content, then extracts the text in that region afterward to confirm nothing survived.
Nanodoc warns you. If the verification step finds text still present in a redacted area, you get an error instead of a false sense of security.
No. Redaction runs locally in your browser or on your device, which matters most for exactly the kind of sensitive documents that need redacting.