How to insert signature in PDF using Xournal++

First, download & install Xournal++ from the homepage. On modern Linux distributions such as Ubuntu 24.04, you can install it using

sudo apt install xournalpp

Step 0: Open the PDF file

Then, open the PDF file you want to sign in Xournal++. You can do this by opening Xournal++ and then opening the PDF file from the File -> Open menu.

Step 1: Add an image

Click on the Image tool in the toolbar:

Now, select the signature (preferably PNG or SVG) file from the file dialog.

Step 2: Place & resize the image

You can move the image around by dragging it with the mouse. You can resize it by dragging the corners. Place the image where you want the signature to be.

Step 3: Save the PDF

Finally, save the PDF file with signature using File -> Export as PDF. Do not use File -> Save As since this will save the file in a Xournal++-specific format and not as PDF.

That’s it! You’ve successfully signed a PDF file using Xournal++.

Example data

You can test this using our test document

• Please sign this document.pdf
• Please sign this document.docx

and using our fantasy signature:

Fantasy signature as SVG

Fantasy signature as PNG