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Add Watermark to PDF
Drag files here orclick to upload
2 files, max 5M each
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About This Tool
Add Watermark to PDF is a free-to-use online PDF watermark tool that requires no installation and no registration — just open and use. It adds text or image watermarks to a PDF, with customizable position, color, font size, opacity and rotation, and can tile the watermark to fill the page. All processing happens locally in your browser, so your files are 100% private and never uploaded to any server. Whether you are adding copyright marks, preventing leaks, or promoting your brand, this tool has you covered — upload and watermark with results rivaling professional PDF editors. (Note: "free" refers to daily free quota, not unlimited; for high-volume or professional needs, consider the membership plan for more quota.)
How to Use
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Upload a PDF
Click the upload area or drag and drop a PDF file into the box; the tool automatically reads the page count
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Set up the watermark
Choose the watermark type (text / image) and set the content, position, color, opacity, rotation and other parameters
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Set the page range
In "Page range", enter something like
1,3-5to target only specific pages; leave blank for all pages -
Start processing
Click the "Start Process" button and download the watermarked PDF when processing finishes
Use Cases
- Copyright marking: add text like "Confidential" / "Draft" or a company Logo image watermark
- Leak prevention: overlay a semi-transparent watermark to trace the file's source
- Branding: add your company identity to PDFs sent to others
Key Advantages
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Text & image support
Both text watermarks and image watermarks (PNG/JPG/WebP) are supported for all kinds of identification needs
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Flexible parameters
Fine-tune position, color, font size, opacity and rotation to create the ideal watermark effect
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Tiling to fill the page
Turn on tile mode to spread the watermark evenly across the whole page for stronger leak prevention and branding
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Privacy & security
All processing is done locally in your browser; files are never uploaded, keeping your data 100% private
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Free & easy
No installation, no registration — open and use, backed by a daily free quota for everyday needs
Text vs Image Watermarks
Choose the type that fits your watermark content and purpose; each has its own strengths:
| Watermark Type | Best For | Adjustable Parameters |
|---|---|---|
| Text watermark | Confidential, draft, date and other text labels | Content, color, size, opacity, rotation |
| Image watermark | Company logos and brand marks | Size, position, opacity, rotation |
| Tile mode | Full-page leak prevention or branding | Horizontal / vertical spacing |
FAQ
The PDF watermark tool is a free online tool for adding text or image watermarks to a PDF. It supports setting position, color, font size, opacity and rotation, and can tile the watermark to fill the whole page.
No. The watermark is drawn as an overlay layer and never covers or modifies the original text or images.
For security reasons, please remove the password from encrypted or password-protected PDFs using our "Unlock PDF" tool before processing.
Yes. Images with an alpha channel such as PNG keep their transparency; combined with the opacity parameter you can achieve a semi-transparent effect.
Files are processed entirely in your local browser and never uploaded to any server — feel free to use it.
Five presets are provided — top-left / top-right / center / bottom-left / bottom-right — and you can fine-tune further with the rotation angle and tile mode.
Yes. Enter something like 1,3-5 in the "Page range" field to watermark only those pages; leave it blank for all pages.
No registration is required. Just open the page to start. We provide free daily usage for everyday light needs; for higher processing volume, upgrading to a membership unlocks more quota.
The tool supports large PDF files, limited mainly by your device memory and page count. For very large files, consider processing in batches for faster, more stable results.
This tool provides free usage every day. Light everyday needs can be met at no cost; when you need higher volume or more frequent use, a membership unlocks more quota for your scenarios.
You can upload PNG, JPG and WebP and other mainstream formats as watermarks; PNG preserves a transparent background.
Yes. The tool works on phones, tablets and computers — as long as you have a browser, you can watermark your PDF documents anytime, anywhere.
Content last updated：2026-07-10
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