What is the PDF Watermark Adder?
Marking a document as "CONFIDENTIAL", "DRAFT" or with your company name helps prevent unauthorised copies from being mistaken for a final version. This tool overlays a diagonal, semi-transparent text watermark across every page of your PDF, with adjustable opacity and angle.
How to Use This Tool
- Upload your PDF.
- Type your watermark text and adjust opacity and angle.
- Click Apply Watermark and download the result.
Frequently Asked Questions
Can I control the watermark opacity and angle?
Yes — set the text, colour, opacity and rotation angle before applying it to every page.
Is my PDF uploaded to a server?
No. The watermark is added entirely in your browser.
Last updated: August 2026
Related tools:
All Tools