Guides · Updated August 2026
How to Add a Watermark to a PDF
A watermark does two jobs: it tells every reader what this copy is (a draft, a sample, a confidential distribution), and it makes quiet misuse awkward — a screenshotted page carries the label with it.
The craft is in restraint. A watermark that makes the document hard to read gets resented and re-typed; one that's too faint does nothing. The settings below get it right.
Step by step
- Open the watermark tool and choose your PDF.
- Type the label — CONFIDENTIAL, DRAFT, SAMPLE, or something specific like 'For review by Acme only'.
- Set opacity: 15–25% labels without obstructing; 40%+ only for SAMPLE-style stamps meant to dominate.
- Choose single (one diagonal mark per page) or tiled (repeating pattern — better against partial screenshots).
- Stamp, download, and flip through a few pages to confirm readability survived.
Tips that save a retry
- Specific text beats generic: 'Draft v3 — not for costing' does more work than 'DRAFT'.
- Watermark before compressing if you're preparing a size-limited upload.
- For a logo rather than text, use the add-logo tool at low opacity and large size.
Questions
Does a watermark prevent copying?
No — it's labelling and traceability, not access control. Combine it with password protection when you need both.
Can someone remove the watermark?
With effort and editing tools, yes. Its value is that casual redistribution carries the label, not that removal is impossible.