About Add Watermark to PDF Free — Custom Text & Image Stamp
Brand and protect intellectual property by overlaying custom text or logo watermarks across PDF pages. Protect confidential drafts, sample proofs, and official documents effortlessly.
Key Features & Capabilities
- Add custom text watermarks (e.g. DRAFT, CONFIDENTIAL, COPY)
- Upload custom image logos as transparent watermarks
- Adjustable opacity, rotation angle, font size, and color
- Apply to all pages or specific page ranges
- Zero server uploads for complete confidentiality
How to Add Watermark to PDF
Step 1: Choose PDF
Select the PDF file you wish to watermark.
Step 2: Configure Watermark
Enter your watermark text or upload a logo image, then adjust opacity and angle.
Step 3: Save Watermarked PDF
Click Apply Watermark to download your stamped document.
Frequently Asked Questions
Can I adjust watermark transparency?
Yes, opacity can be adjusted from subtle faint stamps to bold visible markers.
Are my sensitive business documents uploaded?
No, watermarking runs strictly inside your local browser memory.
Related Utility Tools
Why Zaeyon?
Private, free, and browser-based — no account, no uploads, no compromises.
Zero Uploads
Your files never leave your device. All processing happens locally in your browser memory — nothing is sent to any server.
100% Free Forever
No subscriptions, no hidden fees, no daily limits. Every tool on Zaeyon is permanently free to use without an account.
Instant & Powerful
Powered by WebAssembly — the same low-level technology used in native apps — so processing is fast even for large files.
Works Offline
Once the page loads, the WebAssembly engine runs entirely on your device. No internet connection needed to process files.
Works Everywhere
No software installation required. Runs directly in your browser on Windows, Mac, Linux, iOS, and Android.