PDF Watermark Stamper
Add custom text watermarks, confidential stamps, or drafts across PDF pages with angle, opacity, and page range controls. 100% in-browser.
Select a PDF Document
Upload any PDF to add a confidential watermark or draft stamp
100% Client-Side. Your PDF file never leaves your device.
How to Use PDF Watermark Stamper
Follow these simple steps to complete your task in seconds.
Select PDF Document
Upload any PDF file from your computer or phone.
Customize Watermark Text & Style
Type your watermark (e.g. "CONFIDENTIAL" or "DRAFT"), set font size, opacity, color, and angle.
Stamp & Download
Click "Stamp Watermark" to render the marks locally and download your watermarked document.
Why Choose Quicklity for PDF Watermark Stamper
Engineered for speed, privacy, and flawless conversion accuracy.
Fast Client-Side Stamping
Stamps multi-page PDF documents locally in seconds using WebAssembly and pdf-lib.
Full Visual Customization
Adjust opacity from subtle 10% to 80%, angle (diagonal 45° or horizontal), and custom stamp colors.
Zero Compression Loss
Applies vector text layers on top of existing pages without compressing original embedded graphics.
100% In-Browser Privacy
Confidential corporate contracts and tax filings never touch any cloud server.
Frequently Asked Questions about PDF Watermark Stamper
Everything you need to know about using this tool.
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