Watermark PDF Online — Free, Fast & Secure
Stamp text or image watermarks on your PDF pages. Customize font, size, color, opacity, position, and rotation for professional results. Our watermark pdf tool works entirely in your browser — no software installation required. Your files are encrypted with 256-bit SSL and automatically deleted after processing. No signup or account needed.
Whether you're on Windows, Mac, Linux, iPhone, or Android — our watermark pdf tool works perfectly on any device with a web browser. Process .PDF files up to 100 MB for free, or upgrade to Premium for files up to 4 GB with batch processing.
Why use our watermark pdf tool?
- ✓Text and image watermarks
- ✓Custom positioning
- ✓Opacity control
- ✓Above or below content
- ✓100% free — no registration required
- ✓Works on all devices and browsers
- ✓Files are encrypted and auto-deleted for your privacy
Frequently Asked Questions
Is watermark pdf free?
Yes! Our watermark pdf tool is completely free for files up to 100 MB with up to 2 files per task. No signup, no credit card, no hidden fees.
Is it safe to watermark pdf online?
Absolutely. All files are transferred over encrypted HTTPS connections. We process your files securely and automatically delete them within 2 hours. Your documents are never shared or accessed by anyone.
What is the maximum file size?
Free users can process files up to 100 MB. Premium users enjoy increased limits up to 4 GB per file, plus batch processing for up to 10 files at once.
Does it work on mobile devices?
Yes, our watermark pdf tool is fully responsive and works on smartphones, tablets, laptops, and desktops. No app download required — just open your browser and start processing.