Free Online Add Watermark to PDF
Add text or image watermark to your PDF files instantly — fully private and secure.
Add Watermark to PDF
Upload a PDF, customize your watermark, and download the protected file. Everything runs in your browser.
How to Add Watermark to PDF Online for Free in 2026
Protect your intellectual property, branding, or confidential information by adding watermarks to PDF documents. Our free online PDF watermark tool lets you add text watermarks (like "CONFIDENTIAL", "DRAFT", or your company name) or image watermarks quickly and securely.
Built with client-side technology, this tool processes everything directly in your browser. Your files and watermarks never leave your device.
Why Use Our Watermark Tool?
- Text & Image Support: Add custom text or your logo as watermark.
- Customizable: Adjust opacity, rotation, and position.
- 100% Private: No server upload — complete data privacy.
- Fast & Free: Unlimited use with no registration.
- High Quality: Professional output while preserving original PDF quality.
Common Use Cases
Businesses protect contracts and proposals, authors safeguard e-books, photographers add copyright to portfolios, students mark drafts, and organizations add confidentiality notices.
Frequently Asked Questions
Is this watermark tool free?
Yes. Completely free with no registration, no limits, and no watermarks on the final file (except the one you add).
Are my PDFs private?
Yes. All processing happens locally in your browser. Your files are never uploaded to any server.
Can I add a company logo as watermark?
Yes. Choose "Image Watermark" and upload your logo (PNG recommended for transparency).
Can I remove the watermark later?
The watermark becomes part of the PDF. For removable watermarks, use a separate layer (advanced feature not included here).
Does it support password-protected PDFs?
No. Please remove any password before uploading.