What Is This Tool?
Add Watermark to PDF stamps diagonal text such as CONFIDENTIAL or your name across every page.
What Can You Do With It?
Mark drafts and confidential documents. Brand documents you share.
How Does It Work?
The text is drawn as a transparent image and placed diagonally in the centre of each page with pdf-lib. Any language works.
Key Benefits
Works with any language. Original pages are kept.
Limitations and Important Notes
The same watermark is used on every page. Locked PDFs must be unlocked first.
Privacy and Security
Files are processed inside your browser on your own device. They are not uploaded to Adobe IQ servers, and the result is created locally for you to download.
Real-World Example
Typing DRAFT at 25% opacity places a light grey diagonal DRAFT across every page.
Frequently Asked Questions
Can I use Bangla or other languages?
Yes. The text is drawn with your device fonts, so any script works.
Can the watermark be removed later?
It is part of the page, so it is not easy to remove.
What opacity should I use?
Around 20–30% keeps the content readable.
Related Tools
How to use this tool
- Upload a PDF.
- Type the watermark text and choose the opacity.
- Click Process file and download the watermarked PDF.