How to Add Watermarks to PDF Online for Free
- Upload PDF: Drag and drop your file into the drop zone or click "Select PDF File".
- Customize Watermark: Enter your custom stamp text or click a quick preset (e.g., CONFIDENTIAL, DRAFT). Customize font size, opacity, color, and angle.
- Download: Click "Apply & Download Watermarked PDF" to get your protected document instantly.
Why Use OneToolBox Client-Side PDF Watermarking?
- Zero Cloud Uploads: Protected NDA agreements, financial reports, and contracts remain entirely on your local machine.
- Permanent Stamp Embedding: Vector text watermarks are rendered directly into the PDF content stream across all pages.
- No Limits: Watermark unlimited multi-page documents free of charge.
Frequently Asked Questions (FAQ)
Can the watermark be applied to all pages automatically?
Yes. The watermark is automatically centered and stamped across every single page in the PDF.
Can someone easily remove the watermark?
The watermark is embedded directly into the PDF vector layer, making it permanent across all standard PDF viewers and print drivers.