๐ Edit PDF
Add a Watermark to PDF โ Custom Text, Color & Opacity Free
Add CONFIDENTIAL, DRAFT or any custom watermark text to every page of your PDF. Fully customisable and free.
Watermark PDF
โ Free ยท No signupDrop your file here
or click to browse
Your file is processed locally in your browser โ never uploaded to any server
How It Works
1
Open Watermark PDF
Go to curopdf.com/watermark-pdf.
2
Upload your PDF
Select the document to watermark.
3
Customise the watermark
Enter text, choose color, size, opacity and position.
4
Download
All pages watermarked โ download ready instantly.
How to Add a Watermark to a PDF
Watermarks protect documents, indicate their status (DRAFT, CONFIDENTIAL, SAMPLE) or assert ownership. CuroPDF applies your chosen text diagonally across every page at your chosen opacity.
๐ก Use 20% opacity for a professional subtle look. Use red at 50% opacity for VOID or CANCELLED stamps.
Common watermark uses
- CONFIDENTIAL on sensitive internal documents
- DRAFT on documents that are not yet finalised
- SAMPLE on proposals or templates shared with clients
- Company name or website on shared presentations
Frequently Asked Questions
Is this tool really free?
Yes โ 100% free with no signup, no subscription and no limits.
Are my files stored anywhere?
Never. All processing happens in your browser. Files never leave your device.
Is it secure?
Yes. PDF.js (Mozilla's open-source library) runs locally and ignores scripts inside PDFs.
Does it work on mobile?
Yes โ iOS Safari 14+, Chrome and Firefox on Android fully supported.
Can I use any text?
Yes โ type any word, phrase or company name.
Applied to all pages?
Yes โ every page automatically.