How to Add a Watermark to a PDF

The three settings that matter

A watermark is really three choices working together. Size controls how large the text is. Opacity controls how strongly it stands out — low values produce a faint mark that doesn't fight with the page's own content, high values produce a bold, unmissable one. Angle rotates the text; the classic diagonal look (around 45°) reads clearly without lining up with normal horizontal text, which is why it's the default.

Keeping the original content readable

The goal of a watermark is usually to add context, not to obscure the page. A moderate opacity (roughly 20–40%) keeps the mark visible while leaving the underlying text and images fully legible — nothing about the original content is removed or altered, the watermark is simply layered on top of every page.

How to add a watermark to a PDF

1. 1 Open the tool at pdfdistrict.com/watermark/ and select your PDF.
2. 2 Type your text and adjust size, opacity and angle. The defaults work well for most documents.
3. 3 Click “Add Watermark.” The marked PDF downloads immediately, with the watermark on every page.

Common reasons to add a watermark

• Marking drafts — so a work-in-progress version is never confused with the final one
• Confidentiality notices — labeling a document before it's shared for review
• Sample or preview copies — letting someone see a document's content without it being reused as a final version
• Ownership marks — a lightweight way to identify who a copy was shared with

Watermarking a scanned document? Fix any sideways or upside-down pages with the rotate tool first, so the watermark and the corrected page orientation both look right together.