Below we show how to add text watermark to PDF documents online, for free. Works on all desktop platforms including Mac.
Step 1: Select your PDF document
Documents are uploaded over a secure connection. They stay private and are removed after being processed.
Rather not upload your files to the cloud but work with them locally?
Use Sejda PDF Desktop. Same features as the online service, and the files are processed on your computer.
Click Upload PDF files
and select files from your local computer. Can also just drag and drop files anywhere on the page.
Step 2: Add Text Watermark
Click the Add Text
button at the top of the PDF page. You should see a text watermark being added.
Click on it to edit the text. Type 'Draft' or 'Classified' to try it out.

Step 3: Change text size, rotation and location on page
Click and drag the text watermark to change the location on the PDF page
Drag the rotation handle to rotate the text watermark.
Click and drag the resize handles found on the sides to change font size.
Step 4: Change text color, transparency and font family
Click on the text watermark to reveal its associated menu.
One can change the transparency of the watermark, making the text more or less opaque.
Watermark text color can also be configured, together with the font used for the text.