What is Add Watermark?
Add custom text watermarks to your PDF documents online for free. Customize font size, opacity, and angle to protect confidential files securely.
Watermarking is standard practice for signaling document status, preventing unauthorized distribution, and asserting brand copyright. iLuvePDF lets you customize text strings, font colors, alpha transparency, and diagonal 45-degree rotation angles, or overlay high-resolution PNG logos. All stamping occurs directly on the PDF canvas in client-side memory.
How to Add a Watermark
Follow these straightforward steps to complete your task in seconds:
Key Features of Add Watermark
Engineered for speed, precision, and complete data privacy.
Custom Text & Logo Watermarking
Stamp bold status text ('CONFIDENTIAL', 'DRAFT') or overlay company logos with transparent backgrounds.
Adjustable Opacity & Rotation
Fine-tune opacity from subtle (10%) to solid (100%) and set diagonal 45-degree angles to prevent obscuring text.
Multi-Page Uniform Stamping
Consistently applies the watermark across every page in your document with identical alignment.
Local Browser Processing
Safeguards proprietary company drafts and IP without uploading documents to external servers.
Privacy & Compliance Architecture
Local-first sandbox processing model
100% Client-Side Privacy
Unlike cloud-based tools that transmit your files across the internet to remote servers, iLuvePDF processes all documents directly inside your browser memory using WebAssembly. Your files never leave your device.
GDPR & HIPAA Compatibility
Because zero document data is uploaded, stored, or indexed on external servers, using iLuvePDF automatically meets strict confidentiality and compliance standards for legal, medical, and financial records.
FAQ
Direct answers to common questions about add watermark.
How do I add a watermark to my PDF?
Upload your PDF file, enter the text you want to use as a watermark, adjust the opacity, font size, and color, then click 'Add Watermark' to apply it to all pages.
Can I change the transparency of the watermark?
Yes, you can easily adjust the opacity slider to make your watermark more transparent or more opaque depending on your needs.
In-Depth Guide & Tutorial
How to Add Watermark to PDF Documents Online Securely
Discover how to stamp custom text or image watermarks across your PDF pages instantly in your browser to protect your content and brand.