OnlineFreeToolBoxHow-to guide
How to Add a Watermark to a PDF
A draft, a confidential document, a sample or a review copy — a reader should see at a glance how it may or may not be used. This guide shows how to add a text watermark to every page of a PDF for free, in your browser, with the size, opacity and position you choose.
How to Add a Watermark to a PDF — step by step
- Choose a PDF with “Select PDF file”.
- In the options panel, enter the watermark text and choose its size, opacity and position.
- Press “Add Watermark and Download”.
- Download the watermarked PDF.
Tips
- The watermark is stamped diagonally across the centre of each page.
- Keep opacity moderate — the watermark stays visible while the page text stays readable.
- You can watermark only some pages: choose the specific-pages option and enter the page numbers.
Frequently asked questions
Can I change watermark position?
This tool places the watermark diagonally in the centre of each page.
Can I watermark only some pages?
Yes. Choose the specific-pages option in the options panel and enter the page numbers. Only those pages are watermarked; the rest of the PDF is left unchanged.
Will the watermark hide the text underneath?
It should not, if opacity is kept moderate. Lower opacity keeps the watermark visible while the page text stays readable.