Watermark PDF

The Watermark PDF tool stamps a line of text across every page of a document, right in your browser.

Use it to mark a file as CONFIDENTIAL or DRAFT, or to add a copyright line. You control the look, and nothing is uploaded.

How to watermark a PDF

1. Upload your PDF. It is read locally and the page count appears.
2. Type the text. A status word, a name, or a short notice.
3. Style it. Pick a diagonal, horizontal, or tiled layout and set the color, size, and opacity.
4. Apply and download. The watermark is drawn onto every page of a new PDF.

Why watermark a document?

A watermark signals a document's status at a glance and discourages people from passing off a draft as final. A faint copyright line also asserts ownership without hiding the content.

Because it is applied to every page, the message stays with the file even if a single page is shared on its own.

• Private: the watermark is drawn on your device, never uploaded.
• Every page: applied consistently across the document.
• Adjustable: text, color, size, angle, and opacity.
• Free: no account, no forced branding.

Related PDF tools

Watermarking pairs naturally with other finishing touches. To number the pages as well, the Add Page Numbers tool stamps a count in the corner of each page.

If the file should be locked down after marking, the Protect PDF tool adds a password so only trusted people can open it. And to merge a marked cover sheet onto other files, the Merge PDF tool combines them into one document.

Frequently Asked Questions

Is my PDF uploaded to add a watermark?

No. The watermark is drawn onto the pages in your browser with the pdf-lib engine, so the file never leaves your device.

What can the watermark say?

Anything you type, up to about sixty characters. Common choices are CONFIDENTIAL, DRAFT, a copyright line, or a company name.

Can I change how it looks?

Yes. You control the text, color, font size, and transparency, and you can choose a diagonal, horizontal, or repeated tiled layout.

Will the watermark cover my content?

It sits on top of the page, so a lower opacity keeps the underlying text readable. Around twenty percent is a good starting point.

Is the watermark permanent?

Yes. It is written into the PDF content and appears in every viewer and on printouts. To keep an unmarked version, save the watermarked file under a new name.