PDF Watermark Tool | Add Watermark to PDF Free and security

Start Using PDF Watermark Tool

Three simple steps to add professional watermarks to your PDF documents

Drag and drop your PDF file here

Or click to select a file

Supports PDF files up to 10MB

Watermark Options

Watermark Text

Watermark Color

#000000

Opacity 50%

Size 40px

Rotation Angle 45°

Watermark Spacing 500px

Preview Effect

document.pdf

Powerful Features, Simple Operation

Our PDF watermark tool provides rich features, allowing you to easily create professional watermark effects

Custom Watermark Text

Enter any watermark text you need, such as "CONFIDENTIAL", "DRAFT", "COPY", etc. Supports both Chinese and English.

Rich Style Settings

Freely adjust watermark color, size, opacity and rotation angle to create watermark effects that meet your needs.

Real-time Preview

View watermark effects immediately after setting, download only when satisfied to ensure ideal results.

Pure Front-end Processing

All processing is completed in your browser, files are not uploaded to servers, ensuring your privacy and file security.

Batch Processing Support

Process multi-page PDF documents at once, automatically add the same watermark to each page, improving work efficiency.

Responsive Design

Get excellent user experience on any device, whether it's a computer, tablet or mobile phone.

How It Works

Just three simple steps to quickly add professional watermarks to your PDF

Upload PDF File

Click on the upload area or drag and drop your PDF file to the designated location, supporting files up to 10MB.

Set Watermark Options

Enter watermark text, adjust color, size, opacity and rotation angle, and preview the effect in real-time.

Download Watermarked PDF

After confirming the effect is satisfactory, click the download button to save the watermarked PDF file to your device.

User Testimonials

See what other users say about our PDF Watermark Tool

"This tool is really convenient! I often need to add watermarks to important documents. Before, I had to install complex software, but now I can do it directly in the browser with professional results."

Manager Zhang

Business Manager

"As a designer, I have high requirements for watermark effects. This tool provides rich customization options, allowing me to create watermark effects that meet my needs. It's excellent!"

Designer Li

Graphic Designer

"I feel very secure with the pure front-end processing; no need to worry about file privacy. The operation is simple and intuitive, even computer beginners can easily get started. Highly recommended!"

Professor Wang

University Professor

Frequently Asked Questions

Here are the frequently asked questions from users. If you have any other questions, please contact us

Very secure! Our tool uses pure front-end technology, all file processing is completed locally in your browser and will not be uploaded to any server. This means your files always stay on your device, protecting your privacy and data security.

Our tool supports PDF files up to 10MB. The file size limit is mainly to ensure good processing performance and user experience in the browser.

Yes, our tool supports batch processing of multi-page PDF documents. You can add the same watermark to all pages of a PDF at once, greatly improving work efficiency.

Our tool supports all modern browsers, including Chrome, Firefox, Safari, Edge, etc. For the best experience, we recommend using the latest version of the browser.

You can contact us through the contact information at the bottom of the page, and we will provide you with technical support as soon as possible.

Professional PDF Watermark Tool