Add Watermark to PDF

Common watermark patterns

• DRAFT — large red, low opacity (10-20%), -45° rotation. Standard for documents in review.
• CONFIDENTIAL — grey or red, slightly bolder opacity (25-30%). For internal-only material.
• Copyright — small footer text like "© 2026 Your Company"
• Sample / Preview — for sales documents you don't want copied verbatim

Watermarks aren't real security

A determined recipient can edit a PDF, screenshot pages, or print-then-rescan. Watermarks deter casual copying — they're not protection. For real document security, use PDF encryption (separate tool) and digital signatures.

Privacy

Watermarking happens in your browser via pdf-lib. Nothing is uploaded.