Redact PDF

Blacken areas in PDF files to make them unrecognizable

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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.

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.

Is it secure to use PDF24 Tools?

PDF24 takes the protection of files and data very seriously. We want our users to be able to trust us. Security aspects are therefore a permanent part of our work.

  1. All file transfers are encrypted.
  2. All files are automatically deleted from the processing server within one hour after processing.
  3. We do not store files and do not evaluate them. Files will only be used for the intended purpose.
  4. PDF24 is operated by a German company, Geek Software GmbH. All processing servers are located in data centres within the EU.
  5. Alternatively, you can get a desktop version of the PDF24 tools with the PDF24 Creator. All files remain on your computer here, as this software works offline.

Can I use PDF24 on a Mac, Linux or Smartphone?

Yes, you can use PDF24 Tools on any system with which you have access to the Internet. Open PDF24 Tools in a web browser such as Chrome and use the tools directly in the web browser. You do not need to install any other software.

You can also install PDF24 as an app on your smartphone. To do so, open the PDF24 Tools in Chrome on your smartphone. Then click on the "Install" icon in the upper right corner of the address bar or add PDF24 to your start screen via the Chrome menu.

Can I use PDF24 offline without an Internet connection?

Yes, Windows users can also use PDF24 offline, i.e. without an Internet connection. Simply download the free PDF24 Creator and install the software. The PDF24 Creator brings all PDF24 tools to your PC as a desktop application. Users of other operating systems should continue to use PDF24 Tools.

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