How to Watermark a PDF (Draft, Confidential, or Your Brand)

A watermark quietly does a lot of work: it marks a document as a draft, flags it confidential, or stamps your brand across a proposal so it can't be passed off as someone else's.

Add a watermark in three steps

1. Open Watermark PDF and load your document.
2. Type your text and tune the colour, size, opacity and angle — the live preview shows exactly how it'll look.
3. Click Apply and download.

Everything runs locally in your browser, so sensitive documents stay with you.

Get the look right

• Confidential / Draft: a diagonal, semi-transparent stamp reads clearly without burying the text.
• Branding: lower the opacity so your name sits behind the content, not over it.
• Subtlety wins: 25–35% opacity is usually enough to be seen but not distracting.

Tip: Watermarking pairs well with page numbers for professional, traceable documents.

Watermark a PDF now — your text, your style.