Add Watermark to PDF
Stamp a text watermark across every page — drafts, confidential markings, or ownership notices.
About This Tool & Technical Logic
Overlays semi-transparent diagonal text on every page: DRAFT, CONFIDENTIAL, DO NOT COPY, or your ownership line. Opacity, size, color, and rotation are adjustable.
The watermark draws beneath new content but over the page — visible on screen and in print, in standard PDF fonts that render identically everywhere. Use opacity around 15–25% so body text remains comfortably readable.
For each page: drawText centered, rotated 45°, opacity from the alpha slider — drawn after existing content.
How to Use — Step by Step
- 1
Load and type your text
Short all-caps reads best — long phrases turn into visual noise at diagonal rotation.
- 2
Tune opacity and size
Start at 20% opacity, auto-size on. Preview the first page before committing to all pages.
- 3
Download the marked copy
Keep your clean master; the watermark is permanent in the output file.
Frequently Asked Questions
Not casually — it's page content, not a layer. Anyone with a PDF editor could crop it, so pair watermarks with encryption for sensitive material.