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Gratis PDF Redactor

Black out sensitive text in a PDF for good. Pages are flattened to images so the hidden content is permanently destroyed — not just covered. Runs entirely in your browser.

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Draw black boxes over anything you want hidden. On export, each page is flattened to an image with the boxes burned into the pixels — so the redacted text is physically destroyed, not just covered. Unlike most free tools, the hidden content can't be copied back or recovered. Everything runs in your browser.

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Redact a Legal Document Black Out Personal Information Redact a Bank Statement Redact Medical Records Redact Documents to Protect Sources

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Most free "redaction" tools just draw a black rectangle on top of the text — but the text is still in the file underneath and can be copied or recovered, which has caused real-world data leaks. This redactor does it properly: it destroys the hidden content.

1
Your PDF is rendered in the browser
pdf.js renders each page to an image so you can see and mark it. The file is read into memory locally — never uploaded.
2
You draw boxes over what to hide
Drag to draw a black box over any text, signature, or image you want gone. Boxes can be removed with a tap.
3
Each page is flattened to an image
On export, every page is re-rendered to a high-resolution image with the black boxes burned into the pixels, then assembled into a new PDF with pdf-lib. The original text layer is discarded entirely.
4
You download the redacted PDF
Because the output is image-based, the hidden content is physically gone — it cannot be selected, searched, or recovered.

Safe redaction is exactly the kind of task you should never upload. Everything happens on your device — ideal for lawyers, journalists, HR, and anyone sharing contracts, statements, or records. The trade-off: the exported PDF's text is no longer selectable, which is the price of guaranteed redaction.