The black box that actually deletes
Most "redacted" PDFs in the wild are not redacted: someone drew a black rectangle in a viewer and the original text is still there, one select-all away. Courts, journalists and procurement teams find these every year. The safe way to redact is to remove the content from the file itself, and that is what this tool does: any page with a black box is re-rendered as a flat image with the box burned in, replacing the original page object. What was under the box is not hidden – it is gone.
The tradeoff is honest and shown before you apply: a flattened page is a picture, so its remaining text is no longer selectable either. For a two-page contract where one paragraph must disappear, that is exactly right; if you later need the visible text searchable again, OCR PDF adds a text layer back.
Private by construction
Everything happens in your browser: the preview is rendered locally, the boxes are drawn locally, and the redacted file is assembled locally. There is no upload, no processing queue, no server copy to worry about. Combined with a password from Protect PDF after redaction, the result is a document you can forward without the quiet fear every badly-redacted PDF carries.