Redact PDF

Blacken areas in PDF files to make them unrecognizable

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Information

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How to blacken PDFs

Choose the file you want to blacken. Blacken your file with the tools. Then save your file as a new PDF.

Tools for blackening

There are several tools available for blacking. Blacken with the pen or with shapes to quickly and easily make areas unrecognizable.

Easy to use

PDF24 makes it as easy and fast as possible to blacken PDF files. You do not need to install or adjust anything, just edit your file here.

Supports your system

There are no special system requirements for blackening files. This app works under all common operating systems and browsers.

No installation necessary

You don't have to install any software. This app runs on our servers in the cloud and your system is not changed and does not require any special requirements.

Security is important to us

This tool does not save your files on our server longer than necessary. Your files and results will be completely removed from our system after a short time.

Stefan Ziegler Developed by Stefan Ziegler

Questions and Answers

How can I blacken PDF files?

  1. Use the file selector on this page to choose the PDF file you want to blacken. Your PDF will then be opened in the special PDF24 editor.
  2. Use the tools of this special PDF24 editor to blacken the PDF.
  3. After blackening the PDF, click on the save icon in the toolbar and then use the download button to save your blackened PDF on your computer.

Can the redaction be reversed?

Redactions made with the PDF24 redaction tool are permanent and cannot be undone. The reason for this is that all affected pages are converted into raster images when the redacted document is saved. These images completely replace the original page content. This process ensures that the redacted information is actually removed and can no longer be restored - not even with special tools or through technical analysis. As the original content is lost, the process is not reversible.

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