1. Inspect the original
Open the PDF privacy tool and choose a PDF up to 20 MB and 25 pages. The tool shows common document information such as title, author, creator and producer. It also reports whether PDF.js found an XMP metadata packet or attached files. This inspection is a useful starting point, not an exhaustive analysis of every PDF object.
2. Cover visible details
Choose each page and drag a rectangle over text or images you do not want visible in the new copy. Review names, addresses, browser tabs, headers, footers, small print and every page edge. The tool does not find sensitive information automatically. Try the fictional practice PDF first.
3. Export an image-based copy
The tool renders every page to a new image, draws your solid black covers into those pixels, then places the images into a fresh PDF. Source text, form fields, links, attachments and document information are not copied. The result loses selectable and searchable text, may be larger, and may have slightly softer image quality. This is a new file; the original remains unchanged.
4. Open the downloaded result
Open the exported PDF in a viewer. Check that every cover is where you expected, that any remaining visible detail is safe to share, and that no pages are missing. If the output needs selectable text or a certified signature, use a dedicated PDF workflow. This tool does not add password protection or verify identity.