Add Watermark
Stamp a text watermark on every page of a PDF.
Processed in your browser, nothing uploaded
or drop files here
PDF · 1 file · processed in your browser, nothing uploaded
How to use Add Watermark
- Select one PDF file or drop it on this page.
- Type the watermark text, up to 40 characters. The default is “CONFIDENTIAL”.
- Choose the opacity: Light, Medium or Strong.
- Click “Add Watermark” and download the PDF with the watermark on every page.
Frequently asked questions
Can I use non-Latin text such as Korean or Japanese?
Yes. When the text isn't in Latin script, Add Watermark embeds a Korean or Japanese font in the PDF so the characters display correctly. This makes the result larger than a watermark in Latin letters. Accented letters like é or ñ work with the standard font. The text can be up to 40 characters, including spaces.
Can I change the watermark's position or color?
No. Add Watermark places red text diagonally at 45° across the center of each page, and the position and color can't be changed. The font size adjusts to the page size. What you can choose is the text and one of three opacity levels.
Can I use a logo image as a watermark?
No. Add Watermark only adds text. If you need to place an image on a page, you can upload it in Sign PDF with “Upload image” and choose its position and size, but that method has no opacity setting.
Is it free?
Yes. Use it free in your web browser, with no sign-up or software to install.
Are my files stored on a server?
No. This tool runs inside your browser, so your file is never sent to a server and never leaves your device.
Which files can I use?
You can add one PDF file at a time.