Annotate PDF

Annotate PDF files by highlighting and adding text, images or shapes

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4.8 (233 votes)
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How to annotate PDFs

Select the file you want to annotate. Annotate your file with tools like adding text, images, shapes. Save your file as a PDF.

Many tools

There are numerous tools available for commenting. Everything from free drawing to adding shapes, text and images is available.

Easy to use

PDF24 makes it as easy and fast as possible to annotate files. You don't have to install or configure anything, just edit your file here.

Supports your system

There are no special requirements for commenting on files on your system. This app works with all common operating systems and browsers.

No installation required

You do not need to install any software. This tool runs on our servers in the cloud and your system is not changed and does not require any special things.

Security is important to us

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

Developed by Stefan Ziegler

What others are saying

A really cool tool. It is easy to use and comments are easily inserted. Many tools are available for commenting. It's fun that way.
I like to use this tool on my tablet. The app supports free drawing and so I can draw and write directly in the PDF with the pen. It almost feels like pen and paper.

Questions and Answers

How can I annotate a PDF?

  1. Select the PDF file you want to annotate using the file selection box on this page. Your PDF will then be opened in the PDF24 Editor.
  2. Use the tools of the PDF24 Editor to add new elements like text or images or to highlight text.
  3. After editing, click on the save icon in the toolbar and then use the download button to save your annotated 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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