Add your input
One PDF and your watermark text.
Document desk
Watermark PDF
Add a draft, confidential, or ownership label while keeping the file private.
Privacy built inYour work stays with you
Private PDF workspace
Add a watermark to a PDF
Apply a visible text watermark to all pages or a selected page range.
Your work stays private in your browser while you use this tool.
What does watermark pdf do?
Draw a visible text watermark on every PDF page or a page selection, using diagonal center, horizontal center, or footer placement. Color, opacity from 5% to 100%, and text size from 8 to 240 points are adjustable.
- Input
- One PDF and your watermark text.
- Result
- A watermarked copy of the PDF.
- Price
- Free
- Account
- Not required
How to use watermark pdf
Choose your settings
Add a draft, confidential, or ownership label while keeping the file private.
Save or copy
A watermarked copy of the PDF.
A practical tip
Diagonal, semi-transparent text is readable while keeping the document underneath visible.
When to use watermark pdf
Stamp CONFIDENTIAL diagonally across a review copy.
Add a small footer label to selected appendix pages.
Mark a proposal as DRAFT without flattening all existing PDF content into images.
Worked example
A concrete watermark pdf example
- Input
- A 12-page contract PDF.
- Settings
- Text “CONFIDENTIAL”, all pages, diagonal center, 54 pt, violet, 25% opacity.
- Result
- A 12-page PDF with a translucent diagonal label drawn over each original page.
What to expect
How it works
The tool embeds bold standard Helvetica, measures the watermark against each page, and reduces oversized text to fit the selected placement. It then draws that text on the chosen pages with the requested color, opacity, and either 0° or 35° rotation before saving a new PDF.
Know before using
Limits and edge cases
- A visible watermark is not access control: a determined editor may remove or cover it, and it does not encrypt the document or prove copyright ownership.
- Standard Helvetica cannot encode every script or emoji, password-protected inputs are unsupported, and modifying a signed PDF invalidates its signature.
Common questions
Watermark PDF FAQ
Is watermark pdf free to use?
Yes. Watermark PDF is free to use.
Does watermark pdf keep my work private?
Yes. Your work stays private while you use the tool — nothing you enter is uploaded.
Can I watermark only selected PDF pages?
Yes. Turn off “Apply to every page” and enter a one-based selection such as 1-3,5. Repeated references are applied only once.
Will the watermark replace or hide the original page?
It is drawn as an additional text overlay. High opacity can cover content visually, while lower opacity lets the underlying page remain readable.