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Add Watermark to PDF - Text & Image

Drop PDF here or click to upload

Add text watermark with custom style | 100% local processing

Watermark Settings
48px
-45°
Click to upload image (PNG, JPG)
30%
0°
30%
Live Preview document.pdf
1 / 1

Watermark Added!

Why Use Our PDF Watermark Tool?

100% Private
Watermark is added in your browser. Nothing uploaded to any server.
Fully Customizable
Set font size, color, opacity, rotation, and position.
Live Preview
See exactly how your watermark will look before applying.
⊞
Tile Pattern
Add repeating watermarks across the entire page.

Frequently Asked Questions

How do I add a watermark to my PDF?
Upload your PDF, enter your watermark text, customize the appearance (size, color, opacity, rotation), choose the position, then click "Apply Watermark" to download your watermarked PDF.
What is the tile pattern option?
Tile pattern repeats your watermark text across the entire page in a diagonal grid pattern. This is commonly used for "CONFIDENTIAL" or "DRAFT" watermarks to cover the whole document.
Can I adjust the watermark transparency?
Yes! Use the opacity slider to adjust transparency from 5% to 100%. Lower values make the watermark more subtle, while higher values make it more prominent.
Will the watermark cover my content?
The watermark is added as an overlay. By adjusting opacity and position, you can ensure it doesn't obscure important content while still being visible.
Is my PDF safe?
100% safe. All processing happens locally in your browser using pdf-lib. We don't upload, store, or have access to your files.

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About PDF Watermark Tool

Add a watermark to PDF files online free with FreeToolBox — stamp your PDFs with custom text (like 'CONFIDENTIAL', 'DRAFT', or your company name) or a logo image, controlling opacity, position, rotation, and font size. Watermarking PDFs is essential for protecting confidential documents before sharing, marking drafts, or branding your company's materials. Our tool embeds the watermark directly into every page using PDF-lib.

All watermarking happens locally in your browser — your PDF is never uploaded to any server. The output PDF has your watermark cleanly embedded with no secondary watermark from FreeToolBox. Completely free, no account required.

Frequently Asked Questions

Can I use an image (logo) as a PDF watermark?

Yes. Upload a PNG or JPG logo and it will be placed as an image watermark on each page. For best results use a PNG with a transparent background.

What opacity should I use?

For confidential stamps: 30–50% opacity is standard. For full-page diagonal draft watermarks: 15–25% keeps text readable underneath while marking the document clearly.

Is the watermark applied to all pages?

Yes. The watermark is added to every page. To watermark only specific pages, split them with PDF Split, watermark, then re-merge with PDF Merge.

Is my PDF uploaded to a server?

No. PDF-lib processes your file entirely in the browser. Your document never leaves your device.

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