PDF Watermark

Stamp professional text watermarks across your PDF

The PDF Watermark tool adds a custom text mark to every page of your document — think CONFIDENTIAL, DRAFT, a company name, or a copyright notice. You control the exact look with settings for position, font size, opacity, rotation, and color, and a live preview shows the effect before you commit. In a few clicks you can give internal drafts and shared files the polished, protective labeling that normally requires desktop publishing software.

Watermarks are applied as genuine PDF content, not a temporary overlay, so they travel with the file wherever it goes and appear correctly when the document is printed or opened in any reader. The diagonal, semi-transparent style favored by law firms and enterprises is easy to reproduce: set a 45-degree rotation and a light opacity, and the mark stays clearly visible while leaving the underlying text readable.

Privacy is never compromised. All watermarking is performed locally with pdf-lib inside your browser, meaning your document is never uploaded, stored, or seen by anyone else. That is essential when the very reason you are marking a file as confidential is that it contains sensitive information. You get enterprise-style document protection with complete control and zero exposure, entirely free.

Why use PDF Watermark?

Full styling control

Adjust position, size, opacity, rotation, and color to get exactly the watermark you want.

Applied to every page

The mark is stamped across the whole document as real, permanent PDF content.

Live preview

See how the watermark will look before you apply it and download the file.

Private processing

Everything runs in your browser, so confidential documents are never uploaded.

How to use PDF Watermark

1
Upload the PDF
Drag and drop or browse for the document you want to watermark.
2
Enter your text
Type the watermark text, such as CONFIDENTIAL, DRAFT, or your company name.
3
Style it
Set the position, font size, opacity, rotation angle, and color using the live preview.
4
Apply and download
Stamp the watermark on every page and download the finished, protected PDF.

Common use cases

Mark drafts clearly

Label work-in-progress documents as DRAFT so reviewers never mistake them for final versions.

Protect confidential files

Add a CONFIDENTIAL stamp before sharing sensitive reports internally or with partners.

Brand shared documents

Overlay a company name or logo text to reinforce ownership on distributed material.

Deter unauthorized reuse

Apply a copyright or ownership watermark to discourage copying of your work.

Features at a glance

Custom text watermark on every page
Position control across the page
Adjustable opacity for subtlety
Rotation for diagonal marks
Font size and color options
Live preview before applying
Fully client-side with no uploads
Free with no signup or branding

Frequently asked questions

How do I add a watermark to my PDF?

Upload your PDF, type the watermark text such as 'CONFIDENTIAL' or 'DRAFT', then adjust the position, font size, opacity, rotation, and color. A live preview shows the result before you apply the watermark to every page and download the file.

Can I make the watermark diagonal and semi-transparent?

Yes. You can rotate the watermark to any angle, including the classic 45-degree diagonal, and set the opacity so the mark is visible without obscuring the underlying text. This produces the professional look used on legal drafts and confidential reports.

Does the watermark appear on all pages?

By default the watermark is stamped on every page of the document at the position you choose. Because it is applied as real PDF content, the watermark stays fixed on the page and is included when the document is printed or viewed elsewhere.

Are my PDFs uploaded when adding a watermark?

No. Watermarking is done locally with pdf-lib inside your browser. Your document is never transmitted or stored on a server, so you can safely mark sensitive contracts and internal documents as confidential.

Can the watermark be removed later?

A watermark added by this tool becomes part of the page content, similar to any other drawn text. It cannot be toggled off in a standard reader, so keep an unwatermarked master copy if you may need a clean version in the future.

Your privacy matters

PDF Watermark runs entirely in your web browser. Your files, text, and data are never uploaded to any server, never stored, and never seen by us or any third party. This client-side architecture means you can safely process confidential business documents, personal records, and proprietary data without privacy concerns.