How do I redact a PDF for free?
Drop the PDF into the box above, then drag a rectangle over each name, number, address or picture that must not be seen. Each box is only a mark at first, so you can resize it, move it or delete it. When every area is right, click “Download PDF”. The tool removes the content under the boxes, paints them black and gives you a new PDF to download. Your original is left as it was.
Work through the whole document before you apply, because a detail that appears on page one often appears again in a footer or a table further down. Search by eye, page by page, until you are sure none is left.
Tip: After you save, open the redacted file, select all and paste into a notes app. If any hidden word shows up, mark that area again. A thirty-second check is worth it for anything sensitive.
What is the difference between redacting and drawing a black box?
This is the mistake behind many leaked documents. A black rectangle placed over text looks final, but the words are still in the file underneath. Anyone can select the area, copy it and paste the text out, search for it, or read it in a different viewer.
Real redaction works on the content itself. It deletes the text and image pixels inside each area and only then draws the box. That is what this tool does, and it is why the result can be shared with more confidence. If you only need to cover something visually, such as a rough draft, the Edit PDF tool will do. For anything you would be unhappy to see published, use Redact.
What should I redact before I share a document?
- Personal identifiers: ID numbers, passport and driver’s license numbers, tax numbers, and dates of birth.
- Financial details: account and card numbers, balances and individual transactions you do not want to share.
- Contact details: home addresses, personal phone numbers and email addresses.
- Names: of minors, witnesses, patients or anyone who has not agreed to be named.
- Images: faces, signatures and photos of documents embedded in the PDF.
Also consider the file’s metadata, such as the author and the document title. The Remove hidden data tool clears those for you before you send the file.
Is it safe to redact a PDF online?
It is, with this tool, because your document is never uploaded. Redacting is exactly the moment when a file contains the information you want to protect, so sending it to a stranger’s server to hide it would undo the point. The page loads online, but the redaction itself runs in your browser, on your device.
You can verify it: open the network tab of your browser, redact a file and watch. Nothing carrying your document leaves the page. Keep the original somewhere private and share only the redacted copy.