100% Private & Secure
Your PDF never leaves your device. All watermarking is done locally in your browser — no uploads, no servers.
Browser tool● Processed in your browser
PDF Watermark
Add text watermarks to all pages of your PDF — customize font size, opacity, color, rotation, and position. All processing happens privately in your browser.
All processing is performed client-side. Your PDFs never leave your device.
01 · Guide
How it works
- 01
Upload your PDF file by dragging and dropping or clicking to browse
- 02
Enter your watermark text and customize font size, opacity, color, rotation, and position
- 03
Preview the watermark on the first page of your PDF
- 04
Click "Apply & Download" to add the watermark to all pages and download the result
Why use this tool
Fully Customizable
Control watermark text, font size, opacity, color, rotation angle, and position to match your needs.
All Pages at Once
The watermark is applied to every page of your PDF automatically — no need to process pages one by one.
Free & No Sign-Up
Use this tool completely free with no registration, no limits, and no watermarks on the output.
Frequently asked questions
Is my PDF uploaded to a server?+
No. All processing happens entirely in your browser using pdf-lib. Your PDF never leaves your device, ensuring complete privacy.
Can I customize the watermark appearance?+
Yes. You can customize the watermark text, font size (12-72px), opacity (10%-100%), color (gray, red, blue, or custom), rotation angle (0-90 degrees), and position (center, corners, or diagonal).
Does the watermark appear on all pages?+
Yes. The watermark is automatically applied to every page of your PDF document.
What PDF file size is supported?+
Since processing happens in your browser, the file size is limited by your device's memory. Most PDFs under 50MB work smoothly.
Can I remove the watermark after applying it?+
Once the watermark is embedded in the PDF, it becomes part of the document. We recommend keeping a copy of the original file before applying the watermark.
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