ស្នាមទឹក

What Is PDF Watermarking?

PDF watermarking adds a text or image overlay to one or more pages of a PDF document. Watermarks serve as visual markers indicating ownership, confidentiality status, or document stage — such as 'DRAFT,' 'CONFIDENTIAL,' or a company logo.

Watermarks can be placed above or below the existing content, adjusted for opacity, positioned precisely on the page, and applied in a tiled pattern for full-page coverage.

How to Add a Watermark to PDF

1. Upload the PDF you want to watermark.
2. Choose between text or image watermark.
3. Customize the watermark: set text/image, opacity, position, rotation, and size.
4. Select which pages to apply the watermark to (all or custom range).
5. Click 'Add Watermark' and download the watermarked PDF.

Features

• Text watermarks with customizable font, size, color, and shadow
• Image watermarks with adjustable scale and opacity
• Nine position options (corners, edges, and center)
• Tile/mosaic pattern to cover the entire page
• Layer control — place watermark above or below content
• Custom page range selection

Common Use Cases

• Adding 'CONFIDENTIAL' watermarks to sensitive business documents before sharing
• Branding PDF proposals or reports with a company logo
• Marking draft versions to prevent accidental use of unfinished documents
• Adding copyright notices to digital publications or photography portfolios

Why Use This Tool?

• Protect intellectual property by branding documents with your logo or name
• Mark documents as DRAFT, CONFIDENTIAL, or APPROVED with clear visual labels
• Full customization of font, color, size, opacity, position, and rotation
• Tile pattern option covers the entire page for maximum protection

How It Compares

Word processors and desktop PDF editors can add watermarks, but the process is often buried in settings menus and lacks visual control. Online watermarking tools upload your documents to remote servers.

This tool provides a real-time visual preview of your watermark with full position, opacity, and tiling controls. Everything is processed locally in your browser.

Tips

• Set opacity to 20–30% for a subtle watermark that doesn't obscure content
• Use the mosaic/tile option for full-page coverage on confidential documents
• A diagonal rotation (typically 45°) makes watermarks harder to remove
• Place watermarks 'below content' so text remains fully readable

Frequently Asked Questions

Can I add different watermarks to different pages?

Currently, the same watermark applies to selected pages. For different watermarks, process the PDF multiple times.

Will the watermark print when someone prints the PDF?

Yes. Watermarks are embedded in the PDF and will appear in both digital viewing and printed copies.

Can I remove a watermark I added?

No. Once added, watermarks are permanent. Always keep a backup of your original PDF before watermarking.

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