Redact a PDF (permanent removal)

Why a black box is not enough

In many PDFs, a black rectangle drawn over text does not delete it: the text stays in the file and can be copied or found by a viewer. This mistake has exposed confidential documents more than once.

This tool works differently: the page is rasterized (turned into a 200 dpi image) with the black areas painted in, and a new page is built from that image. The original text, fonts and layers are not in it anymore.

redacted page = page image + black areas, with no hidden text

How to use it

1. Draw boxes on the page shown, or type a word (name, number, address) and click "Find and black out": every match on every page is located.
2. Review each page with ◀ ▶ and remove any extra box.
3. Apply: only the affected pages are converted; the others are copied as they are.

Before you share the file

The title, author and keywords stored in the PDF are cleared. Still check every page in the preview before sending it: a name can also hide in an image or a stamp, which text search cannot see. Redacted pages are images, so the file can get larger.

How to redact a PDF in seven steps

To redact a PDF without mistakes, follow this order. Each step is quick.

1. First, drop your PDF into the tool.
2. Next, scan each page for sensitive data.
3. Then draw a box over each item, or type a word to search.
4. After that, step through the pages with the arrows.
5. If a box does not belong, remove it.
6. Then click Apply.
7. Finally, download the redacted file.

So you control every area before the page changes. When you search a word, the tool finds it everywhere. That saves time on a long file.

What to redact in each type of document

Every paper hides different details. This table helps you miss nothing when you redact a PDF.

For example, for a rental application, hide the Social Security number and the photo. However, keep the income figures if the landlord needs them.

Mistakes that leak data when you redact a PDF

A failed redaction exposes data. So avoid these traps.

• Drawing a black box in another app: the text stays underneath. Here the page rebuilds, so the text disappears.
• Missing small spots: check footers and watermarks too.
• Searching one spelling only: try variants such as Martin and MARTIN.
• Skipping the review: open each page before you apply.
• Ignoring pictures: word search cannot read text inside a photo. Draw a box by hand instead.
• Overwriting the original: keep it in a separate folder. Then you can start over.

Also, never send the original by mistake. Name the safe copy clearly, for example lease-redacted.pdf.

After you redact a PDF: check and share

Open the final file and try to select the text under a black area. Nothing should come out. Next, use your PDF viewer's search to retype a hidden word. No match should appear. Finally, look at the file size. Image pages weigh more, so shrink the file with Compress PDF if needed.

Related tools

To stamp a warning on the copy, add a watermark to a PDF. You can also fix typos with Edit PDF before you redact. If the document comes from a scanner, run OCR PDF first. Then word search works. Last, Organize PDF helps you drop extra pages before you send the file.

A short privacy routine

Redact first. Compress second. Watermark third. Then share. Each step takes seconds. You protect names, numbers and addresses. You also keep control of the original. Nobody else touches your file while you redact a PDF. The tool runs in your browser. You decide who gets the final copy. Check twice and send once whenever you redact a PDF. That habit prevents most leaks. It costs you one extra minute. It saves you a lot of trouble if you redact PDF files often. Redact a PDF on your next form. You will see how fast it goes. Then repeat it every time.

Quick answers

Can you undo a redaction after you apply it? No, so keep the original. Does the tool read scanned pages? Word search does not, but drawn boxes work on any page. Does the file keep its links? The redacted pages become images, so links on those pages stop working. Do untouched pages change? No, the tool copies them as they are. Does the tool keep a copy of your file? No. Does it need an account? No.

Which dpi does it use? It renders at 200 dpi. Does the text stay sharp? Yes, at normal reading size. Can you print the result? Yes. Can you search the result? Not on the redacted pages.