Add a text watermark to a PDF privately
Mark drafts and confidential copies with a diagonal or straight watermark in any language. Your file stays on this device.
How to watermark a PDF
Choose or drop your PDF.
Type the watermark text and choose the direction, opacity, size, and color.
Add it to all pages or only the selected ones, then save the PDF.
Frequently asked questions
Can the watermark be in Japanese, Russian, or another language?
Yes. The text is drawn on this device as a transparent image, so any language and script shows the same in every PDF app.
Can a watermark be removed?
A watermark discourages reuse, but anyone with a PDF editor can remove it. To control who can open a file, also protect it with a password.
Are my files uploaded?
No. The PDF is read and changed by code running in this browser tab. The tools page blocks network connections for file processing, so the document, its pages, and any password you type stay on your device.
How large can the PDF be?
Up to 150 MB per file, 300 MB in total when you work with several files, and 500 pages. Very large or complex documents also depend on your device’s memory.
Is it free?
Yes. The PDF tools are free to use, need no account, and add no watermark.