ToolFeather

Add a Watermark to a PDF

Stamp DRAFT, CONFIDENTIAL, or any text across your pages — privately, in your browser.

Watermark PDF

Drop a PDF here or click to choose

🔒 Your PDF is processed entirely inside your browser using JavaScript — it is never uploaded to any server.

🔒 Nothing you enter is sent anywhere or stored. All processing happens in your browser.

Features

Stamp text across every page

Add DRAFT, CONFIDENTIAL, a name or any text over all pages to mark a document's status or ownership.

Adjustable look

Control the text, font size, colour, opacity and diagonal or horizontal placement.

Runs on your device

The watermark is applied in your browser with no upload, so sensitive files stay private.

Readable underneath

A low opacity keeps the page content legible beneath the watermark.

How it works — in four simple steps

No signup, nothing to install — it all runs in your browser.

Step 01

Choose a PDF

Drag in or select the document you want to watermark.

Step 02

Set your watermark text

Type the text — for example CONFIDENTIAL — and adjust size, colour, opacity and angle.

Step 03

Apply

Press Add watermark — the text is stamped across every page locally.

Step 04

Download

Download the watermarked PDF, ready to share with its status clearly marked.

How it works

A watermark marks a document's status or ownership — DRAFT, CONFIDENTIAL, a company name, or SAMPLE — across every page so its purpose is unmistakable even after printing or forwarding. This tool overlays your chosen text without altering the underlying content.

Load a PDF, type the watermark text, and adjust the font size, color, and opacity (a low opacity keeps the page readable underneath). Keep "Diagonal" on for the classic 45° stamp, or turn it off for horizontal text. The watermark is drawn on every page with pdf-lib's bold Helvetica.

Because it runs entirely in your browser, sensitive documents are never uploaded. Note that a text overlay is a visual marker, not encryption — it deters casual misuse rather than preventing determined removal.

Examples

DRAFT at 20% opacity, diagonal → a clear work-in-progress stamp.
CONFIDENTIAL in red across each page before sharing.
Your company name, low opacity → subtle branding on a proposal.

Frequently asked questions

Is the watermark on every page?
Yes — the text is stamped across all pages of the document.
Can I make it subtle?
Yes. Lower the opacity so the page content stays readable beneath the watermark.
Is this the same as protecting the PDF?
No. A watermark is a visual marker, not security. It discourages misuse but can be removed by determined editing.
Is my file uploaded?
No — the watermark is applied in your browser and the file never leaves your device.