Watermark PDF
Add Custom Text or Image Watermarks to PDF Online
Drag and Drop PDF files here
Fast, 100% private in-browser processing. Your files never leave your device.
Protect your intellectual property by applying customizable text stamps or logo watermarks across PDF pages with adjustable opacity, angle, and position.
How to use Watermark PDF
Upload PDF
Select the document you wish to watermark.
Customize Watermark
Enter custom text (e.g. 'CONFIDENTIAL', 'DRAFT') or upload a transparent PNG logo.
Set Position & Opacity
Adjust rotation angle, font size, opacity, and positioning.
Apply & Download
Download your protected watermarked PDF.
Key Features & Capabilities
Text & Image Watermarking
Support for custom typography stamps and company brand logos.
Opacity & Angle Controls
Subtle translucent background watermarks that protect documents without obstructing readability.
Zero Upload Security
Watermarking is stamped locally in browser memory.
Frequently Asked Questions
Can the watermark be removed easily?
Watermarks are permanently rendered into the document content streams.
Can I watermark specific pages?
Yes, you can apply watermarks to all pages, odd/even pages, or custom page ranges.
🔒 100% Client-Side Privacy Guarantee
OM PDF processes all documents entirely in your web browser memory using WebAssembly. Your files are never uploaded to any cloud server, preventing data leakage and guaranteeing total security for confidential documents.