How to add a do not copy watermark to a pdf
- Step 1Upload the restricted PDF — Drop the document into the watermark tool.
- Step 2Enter DO NOT COPY as watermark text — Choose a red or dark colour at 20% opacity for maximum impact.
- Step 3Apply to all pages — Process and preview the watermarked pages.
- Step 4Distribute the marked copies — Download and share only the watermarked version.
Frequently asked questions
Does a watermark prevent digital copying?+
No — determined users can still copy text or images. For stronger protection, combine with password restrictions via the Permission Setter tool.
Can I track who received a copy?+
For tracking, add a recipient-specific identifier alongside DO NOT COPY (e.g., 'Copy issued to: [name]') and use the Stamp tool for per-recipient personalisation.
Is red the best colour for a DO NOT COPY watermark?+
Red at 25-30% opacity is the most impactful visually. Lighter colours are less distracting for reading but may be less prominent.
Privacy first
All PDF processing runs locally in your browser using PDF-lib and pdf.js. No file is ever uploaded — only metadata counters are saved for signed-in dashboard stats.