Add Watermark to PDF Online – Stamp Text or Image Watermarks
Add custom text or image watermarks across every page of your PDF. Customize opacity, position, rotation, and font styling.
Drag & drop your file here
Accepts .pdf
Choose FileOptions
How to Use Watermark PDF
- Upload PDF.
- Type watermark text or upload brand logo.
- Adjust transparency and angle.
- Download watermarked document.
Key Features & Security Standards
Client-Side & In-Memory Privacy
All computations, transformations, and string manipulations execute in your local browser memory or isolated ephemeral worker instances with zero permanent disk persistence.
Zero File or Data Retention
Your sensitive files, JWT keys, credentials, and code snippets are never shared, logged, or indexed. Data is automatically flushed as soon as your browser tab closes.
100% Free & Unlimited Usage
No credit cards, sign-ups, subscriptions, or watermarks. All Watermark PDF features are accessible without rate limitations or intrusive paywalls.
Frequently Asked Questions
Is Watermark PDF free to use?+
Yes, Watermark PDF is 100% free with no registration, usage limits, or hidden fees.
Are my files or data private?+
Yes. All processing executes in-memory or directly client-side in your web browser with zero persistent file storage.