Add Watermark to PDF Online

Watermarking PDF documents is one of the most effective ways to protect intellectual property, prevent unauthorized distribution and establish brand ownership. A watermark can be text or an image placed transparently across each page of a PDF file.

GKPTool Watermark PDF allows you to add professional text or logo watermarks to PDF documents instantly without uploading files to any server.

What Is a PDF Watermark?

A PDF watermark is a visible overlay added to document pages. It may include company logos, brand names, copyright notices or security labels such as “CONFIDENTIAL” or “DRAFT”.

Why Add Watermark to PDF?

• Protect copyrighted documents
• Prevent unauthorized sharing
• Display ownership
• Mark document status
• Improve document authenticity

Text Watermark Features

• Custom watermark text
• Multiple font styles
• Color selection
• Opacity control
• Rotation angle support

Logo & Image Watermark

Upload PNG or JPG logos and apply them as watermarks. This is commonly used by companies to brand invoices, reports and marketing materials.

Position & Alignment Options

You can place watermarks in center, corners or edges. Rotation support allows diagonal watermark placement across pages.

How to Add Watermark to PDF

1. Select PDF file.
2. Choose text or image watermark.
3. Customize size, color and opacity.
4. Set position and rotation.
5. Click Download Watermarked PDF.

No Quality Loss

Watermarks are added as vector overlays. Original PDF quality, resolution and text clarity remain unchanged.

Client-Side Privacy Protection

All watermark processing happens locally in your browser. Files are never uploaded or stored on external servers.

Who Uses PDF Watermark?

• Business owners
• Teachers
• Legal professionals
• Design agencies
• Students

Common Use Cases

• Brand invoices
• Protect study material
• Secure legal documents
• Add copyright notice
• Share preview documents

Frequently Asked Questions

Is Watermark PDF tool free?

Yes, unlimited usage is completely free.

Are my files uploaded?

No. Files stay on your device.

Can I watermark multiple PDFs?

Yes, batch watermarking is supported.

Can I remove watermark later?

Watermarks become permanent once applied.

Does watermark affect printing?

No. Documents print normally.