What are the benefits of PDF Watermark?

9 position options and page range selection let you handle complex document watermarking scenarios with precision.. Customize font size, opacity, and color to match your brand, document type, or use case effortlessly.. Entirely browser-based processing keeps sensitive PDF data private; nothing is uploaded to any server.. No software to install — works instantly on any device with a web browser; no learning curve required..

Is PDF Watermark free?

Yes, it is completely free to use, and no registration is required. Tool processing happens entirely in your browser, and your input content and uploaded files are not sent to a server. Our first-party improvement metrics use no cookies, visitor IDs, or session IDs and store only normalized page paths and daily counts for fixed event IDs.

PDF Watermark

Flexible watermark placement with 9 positions and page range selection, entirely in your browser

📄

PDF透かし追加

ファイルをドラッグ＆ドロップ

About PDF Watermark

There are many situations where you need to add text watermarks to PDFs: sharing confidential documents, distributing draft versions, adding copyright notices, and more. Watermarks like 'CONFIDENTIAL', 'DRAFT', or 'SAMPLE' clearly indicate the handling level of a document and help prevent unauthorized copying or accidental distribution.

This tool goes beyond basic "full-page fixed-position" watermarking by offering 9 position options (top-left, top-center, top-right, center-left, center, center-right, bottom-left, bottom-center, bottom-right) and page range selection. Upload a PDF, enter your text, choose where the watermark should appear, and select which pages to mark — all in seconds without writing code or using complex software.

Customize the font size (8–120px), opacity (1–100%), and color (gray, red, or blue) with a real-time preview before downloading. All processing runs locally in the browser using pdf-lib, so sensitive PDF data is never sent to any server. Perfect for internal document management, draft contract distribution, proposal review versions, bulk adding confidential marks, and any other business scenario where watermarks improve document security and clarity.

How to use PDF Watermark

Drag and drop a PDF file or click to select one.
Enter the watermark text and adjust font size, opacity, and color using the controls.
Select a position from the dropdown menu (9 options: center, top-left, bottom-right, etc.).
Set the page range by entering the start and end page numbers. Leave blank to apply to all pages.
Review the preview and click the download button to save your watermarked PDF.

Benefits of PDF Watermark

9 position options and page range selection let you handle complex document watermarking scenarios with precision.
Customize font size, opacity, and color to match your brand, document type, or use case effortlessly.
Entirely browser-based processing keeps sensitive PDF data private; nothing is uploaded to any server.
No software to install — works instantly on any device with a web browser; no learning curve required.