Add Watermark to PDF

How to use Add Watermark to PDF

1. Select or drop a PDF.
2. Type the watermark text and adjust size, colour, opacity, angle and position.
3. Optionally limit it to certain pages.
4. Press Add watermark and download the PDF.

Supported formats and limitations

Input

One PDF

Output

PDF

Works on

Any modern browser on Windows, macOS, Linux, Android and iOS. JavaScript must be enabled.

Important limitations

The watermark is drawn on top of the page content as a transparent image, so it supports any language and script. Password-protected PDFs must be unlocked first.

Privacy and file processing

Processed in your browser. The file is never uploaded to our server.

About Add Watermark to PDF

Add Watermark stamps text across your PDF pages to mark them as confidential, draft, sample or copy, or to show your brand name on documents you share.

Choose the words, size, colour, opacity and angle, and place one watermark in the centre or repeat it across the page. Because the text is drawn with your device’s fonts, it works in English, Hindi, Marathi and any other script your browser can show.

Features

• Any text, in any script
• Size, colour, opacity and angle controls
• Centred or tiled placement
• Apply to all or selected pages

Why use it

• Discourage unauthorised sharing
• Mark drafts clearly
• No upload of confidential documents

How it works

Your text is rendered in high resolution onto a transparent canvas, embedded once in the PDF as an image and drawn on each selected page at the chosen angle and opacity with pdf-lib.

Examples

Add Watermark to PDF: frequently asked questions