How to black out text in a PDF for free
Blacking out text in a PDF should mean the text is gone. Too often it just means a black rectangle sits on top of words that are still there. This guide shows how to black out text in a PDF for free in a way that actually removes the underlying content.
The hidden risk of a black box
When you place a black shape over text using a markup or highlighter tool, the document still contains the original words. Anyone can:
- Select the page and copy the text out from under the box.
- Search the PDF and find the "hidden" words.
- Open the file in another program where the box and the text are separate layers.
That is why a proper redaction tool does not draw a box. It deletes the text inside the area you mark.
Black out text properly
- Open your PDF in a tool that redacts in the browser.
- Drag a box over each word, line, or block you want to hide.
- Apply. The content inside every box is removed and the area is filled in solid.
- Download the finished file.
The result looks the same as a black box, but there is nothing underneath. Copy and paste returns empty space.
When you need to black out a lot
For pages with many items, look for automatic detection. A good tool can find emails, phone numbers, Social Security numbers, and card numbers and mark them for you. You confirm, then black them all out at once. This is much faster than hunting for each value by hand.
Free, private, and no signup
You do not have to upload your document to a server to black out text. Browser based redaction keeps the file on your device, which matters when the document is private in the first place. There is no account required to try it, and no watermark on a single redaction.
Try it
Black out text in a PDF for free. It runs in your browser, actually removes the text, and your file never leaves your device.