Add Watermark to PDF
Stamp any text onto your PDF — brand it, protect it, or mark it as DRAFT, CONFIDENTIAL, or anything you like.
Why Use Our PDF Watermark Tool?
Add professional text watermarks to any PDF in seconds. No sign-up, no installation, no file uploads — everything runs privately in your browser.
Fully Customizable Text
Type any watermark text — your brand name, CONFIDENTIAL, DRAFT, SAMPLE, or any custom label. Choose font size and color.
Live Preview
See exactly how your watermark looks on the first page before applying it. Adjust opacity and position in real time.
Private & Secure
All processing happens locally in your browser using PDF-lib. Your PDF is never uploaded to any server.
How to Add a Watermark to Your PDF
Upload Your PDF
Click "Select PDF File" or drag and drop your PDF into the upload zone above.
Customize Your Watermark
Enter your watermark text, choose a color, adjust opacity, font size, and select the position.
Preview the Result
See a live preview of your watermark on the first page. Make any adjustments until it looks perfect.
Download Your Watermarked PDF
Click "Apply Watermark" to stamp all pages and download the final PDF instantly.
Watermark PDF FAQs
Is this watermark tool completely free?
Yes. Adding watermarks to your PDF is 100% free with no hidden charges, no sign-up, and no watermarks added by us.
Is my PDF uploaded to a server?
No. Your PDF is processed entirely inside your browser using the PDF-lib library. The file never leaves your device, ensuring complete privacy.
Will the watermark appear on all pages?
Yes. The watermark is applied to every single page of your PDF document with consistent placement and styling.
Can I change the opacity so the text is subtle?
Absolutely. Use the opacity slider to go from a very light, barely visible watermark to a more prominent one. You can preview the effect before applying.
What positions can I place the watermark?
You can place your watermark diagonally across the center (classic), or at the top-center or bottom-center of each page.