About this tool
Add Watermark stamps your text — CONFIDENTIAL, DRAFT, your company name — diagonally across every page at a subtle strength you control, marking drafts and protecting shared documents.
How to use it
- Choose your PDF and type the watermark text.
- Slide the strength until it looks right for your document.
- Click Add Watermark and download.
Frequently asked questions
Can a watermark be removed?
It is drawn onto each page like content, so casual removal is not possible — but a determined editor can alter any PDF. Treat watermarks as marking, not security.
What strength should I use?
15% (the default) is visible without hiding the text. Use 25-35% for strong DRAFT marking.