Private PDF watermarking
Add a Watermark to a PDF
Place custom diagonal text across every page, adjust its color and opacity, and download the marked document privately.
Processing happens locally in your browser. Your PDF is not uploaded.
How to use the PDF watermark tool
- STEP 1Choose a PDF and enter the watermark text.
- STEP 2Select a color and opacity level.
- STEP 3Process and download the watermarked PDF.
About this tool
Mark drafts, samples, internal documents, proofs, and confidential files with consistent text across every PDF page.
The watermark is centered and rotated diagonally on each page. Font size adapts to page width and watermark length.
A visual watermark communicates status but does not encrypt the PDF or prevent determined content extraction.
Frequently asked questions
Where is the watermark placed?
It is placed diagonally across the center of every page so it remains visible across different page layouts.
Can I control transparency?
Yes. Adjust opacity from subtle to fully opaque and choose any text color.
Is my PDF uploaded?
No. Watermarking runs locally in your browser.