Add Watermark to PDF
Design and embed secure text or image watermarks client-side with visual preview.
Upload PDF
Drag and drop your PDF here, or click to search files.
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Protect PDF
Add secure user passwords and protect your PDF documents with client-side encryption.
Unlock PDF
Remove password restrictions and decode your protected PDF documents instantly.
Merge PDF
Combine multiple distinct PDF documents into a single professional-grade file quickly and securely.
Mastering the
Add Watermark to PDF Online
"Protect your PDF documents with custom text or image watermarks. 100% private, client-side overlay generator, and free."
01What is Add Watermark to PDF Online?
The ToolWala AI Add Watermark to PDF tool is a professional utility that applies custom text or image stamps onto PDF document pages. Standard watermarking services require you to upload your contracts, portfolios, or draft papers to remote servers, risking leaking private documents. Our tool runs entirely in your web browser. You can load a PDF, enter a custom text watermark or select a logo/image, adjust size, transparency, rotation angle, and position alignment, preview the output instantly on the page layout, and compile the final document locally. Your original files and metadata are preserved securely.
02How to use Add Watermark to PDF Online
Upload your PDF file using the secure drag-and-drop zone or system browser.
Select your watermark type: Text or Image.
Customize properties: type your text or load a logo image, and adjust opacity, rotation, and font sizes.
Choose a position preset (such as Center, Top Left, or Tiled Diagonal).
Specify which pages to watermark, click 'Apply Watermark', and download the stamped PDF.
03Key Features
Browser-Side Stamping
No document uploads occur. Your files are processed entirely in browser memory, maintaining absolute security.
Image & Text Formats
Overlay text with customized colors and fonts, or upload your corporate brand logo in PNG/JPG formats.
Real-Time Previewer
Instantly preview your watermark overlay as you drag sliders and adjust presets, without rebuilding PDF bytes.
Flexible Geometry Setup
Fine-tune opacity values, rotate stamps to any angle, change scale dimensions, and select page distributions.
04Benefits
- Complete data confidentiality for proprietary presentations, legal drafts, and financial quotes.
- Super-responsive sliders and layouts with zero server rendering lag.
- Fits mobile screens, tablets, and desktop workstations.
- Completely free to use with no account log-in, limits, or watermarks of our own.
05Use Cases
- Photographers stamping digital contact sheets and draft portfolios for client review.
- Lawyers and writers adding 'CONFIDENTIAL' or 'DRAFT' overlays to legal agreements.
- Businesses overlaying brand logos on sales flyers or marketing decks.
- Academics stamping research drafts before sharing with peers.
Why Choose ToolWala AI?
Many free online editors lower document resolution or add their own promotional stamps. ToolWala AI uses client-side drawing frameworks to preserve the original quality of your PDF pages while adding your watermark with professional precision. It's clean, private, and fully customizable.
Common Questions
Final Verdict
Protect your intellectual property securely and customize your PDF presentation. Stamp your files locally using ToolWala AI's Watermark tool.
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Recommended Utilities
Parent Category
PDF ToolsFiles Never Leave Your Device
ToolWala executes all operations directly on your computer using WebAssembly (WASM) sandboxing and local RAM compilation. We do not copy, store, or transmit your private document details. 100% serverless, private-by-design.
No Uploads
Files compile in local RAM.
No Signups
Skip email collection.
Offline Ready
Works with internet cut off.
GDPR Compliant
Complete data sovereignty.
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