Watermark PDFs and pictures

How to add a watermark

1. Choose PDF files or JPG/PNG pictures (several at once is fine).
2. Pick a preset or type your own text, or use a picture as the watermark, then adjust the layout, tilt, size and opacity. Check the preview below.
3. Press "Add the watermark and save". Several files come as a zip.

Your files stay on your device

This tool opens the files from your device, adds the watermark in your browser's memory and saves the new files back to your device. Nothing is uploaded and no file or file name is kept. That suits copies of ID cards, which should not be sent to any website.

Good to know

• The watermark is put over the page, not hidden under its text, and it is a picture (the text is drawn with the Sarabun font so Thai comes out right), so it cannot be selected as text. The text already in a PDF is not changed.
• A watermark tells people what a copy was made for and when, but it does not stop all misuse. A watermark across an important number does not hide that number; to really hide it, use redaction.
• A JPG comes out saved again at 92% quality, and data inside the picture, such as the GPS position, is not carried over. A picture too big for the browser is made smaller and you are told.
• PDF files locked with a password need to be unlocked first.

Report a problem or suggest an idea

Found a problem, or want this tool to do more? Tell us on the feedback page. No sign-up needed.