Is my PDF uploaded to a server?

No. The entire watermarking process runs locally in your web browser. Your sensitive documents never leave your computer.

PDF Watermark Tool

Protect your documents by adding custom text watermarks instantly, securely, and privately.

Drag & Drop your PDF here or Click to Browse

Watermark Text:

Font Size:

Opacity (0.1 - 1.0):

Color:

Rotation (Degrees):

About the PDF Watermark Tool

Our PDF Watermark tool offers a professional, fast, and completely secure way to stamp your documents with custom text. Whether you need to mark a file as 'Confidential', 'Draft', or 'Do Not Copy', this utility handles it flawlessly without requiring expensive desktop software.

What is it?

This is a browser-based application powered by modern PDF manipulation libraries (pdf-lib). It reads your PDF file locally, calculates the geometry of each page, and draws your customized text over the content at your specified opacity and angle.

Step-by-step How to Use

1. Upload: Drag and drop your PDF into the designated area or click to select a file.
2. Customize: Enter your watermark text (e.g., CONFIDENTIAL).
3. Adjust Settings: Tweak the font size, opacity, color, and rotation angle to your liking.
4. Download: Click the 'Download Watermarked PDF' button. Your new file will be generated instantly.

Key Features

- Full client-side processing for ultimate privacy
- Customizable text, font size, and color
- Adjustable opacity for subtle or bold watermarking
- Precise diagonal rotation capabilities
- Works seamlessly on large, multi-page documents

Real-world Industry Applications

Legal professionals use this to stamp court exhibits. Photographers and designers watermark their portfolios to prevent unauthorized commercial use. Corporate HR departments mark draft policies to prevent premature distribution.

Client-side Privacy Guarantee

We believe your sensitive documents are your business. This tool operates entirely inside your device's web browser. The PDF is never transmitted over the internet, stored on a server, or shared with third parties.

Frequently Asked Questions

Q: Does this work on mobile devices?
A: Yes! Modern mobile browsers can handle the local processing required to watermark PDFs.

Q: Is there a file size limit?
A: There is no hard limit imposed by our server since the processing is local. However, files over 50MB might take a few moments depending on your computer's RAM.

Q: Can I remove the watermark later?
A: No. Once the watermark is embedded and downloaded, it is baked into the new PDF file to ensure security. Always keep your original file.

Q: Is this service free?
A: Absolutely. It is 100% free with no hidden charges or subscriptions.