Watermark PDF
Stamp your documents with text or images. Protect your intellectual property with custom watermarks.
Upload PDF to Watermark
Brand your documents securely offline.
Your Privacy is Our Priority
Unlike other online tools, PDFaiGen processes your files directly in your browser. No file uploads, no server data breaches.
Zero Uploads
Files never leave your device. All processing happens locally in your browser memory.
End-to-End Private
Since no data is sent to any server, your sensitive documents remain completely private.
Works Offline
Once loaded, our tools work without an internet connection. No data usage required.
How It Works
Simple, fast, and secure. Get your file processed in 3 easy steps.
Upload PDF
Import the PDF document you want to watermark.
Customize
Choose text or image, adjust opacity, position, and size.
Download
Get your protected PDF with the watermark applied instantly.
Key Features
Why Choose PDFaiGen?
We are building the future of document processing — focusing on privacy, speed, and design.
100% Privacy Guaranteed
No cloud uploads. Your files are processed entirely on your device using WebAssembly technology.
Lightning Fast
Zero upload time. Zero download time. Instant processing powered by your own hardware.
Easy to Use
Simple drag-and-drop interfaces designed for efficiency. No accounts or sign-ups required.
Common Use Cases
See how others are using this tool to save time and improve workflows.
Confidentiality
Mark sensitive documents with 'CONFIDENTIAL' or 'DO NOT SHARE'.
Copyright
Add your logo or company name to protect intellectual property.
Draft Versions
Label preliminary work as 'DRAFT' to prevent confusion.
Invoices
Stamp invoices as 'PAID' or 'OVERDUE'.
Official Copies
Mark documents as 'COPY' or 'ORIGINAL'.
Complete Guide: How to Add Watermarks to PDF Files
Adding watermarks to PDFs helps protect intellectual property, mark documents as drafts, or add branding. Our tool supports both text and image watermarks with full customization options.
Upload Your PDF
Select the PDF document you want to watermark. The file is processed locally in your browser.
Choose Watermark Type
Select either 'Text' to add custom text (like 'CONFIDENTIAL' or your company name) or 'Image' to upload a logo or stamp.
Customize Appearance
Adjust the watermark's opacity, size, rotation angle, and position. Use the live preview to see how it looks on your pages.
Apply to Pages
Choose whether to apply the watermark to all pages, odd pages, even pages, or specific page ranges.
Generate and Download
Click 'Add Watermark' to process the PDF. Download your watermarked document immediately.
Pro Tips
- Use 30-50% opacity for subtle watermarks that don't obscure content.
- Diagonal watermarks (45° rotation) are harder to remove and more professional.
- For branding, use PNG logos with transparent backgrounds.
Common Issues
Watermark too dark or too light?
Adjust the opacity slider. For background watermarks, use 10-20% opacity. For prominent stamps, use 60-80%.
Watermark not visible on all pages?
Check your page range settings. Ensure 'All Pages' is selected if you want the watermark on every page.
Why We are Better
See how PDFaiGen compares to traditional online PDF tools.
Secure Your Documents
Apply professional watermarks to your PDFs in seconds. No uploads essential.
No credit card required • No installation • 100% Private