Edit — SecPDF
Add a watermark to your PDF
CONFIDENTIAL, DRAFT or your own words — set the tone before anyone reads the first line.
100% in your browserNo file uploadsFree, no signup
Drop your file here
or
Choose fileUp to 50 MB per file — processed locally, never uploaded
How it works
Open your PDF
Drop the document into the box above — it loads directly in your browser.
Design the stamp
Type your watermark text and set size, color, opacity and angle. Choose one centered stamp or a tiled pattern.
Stamp & download
Click Add watermark — the stamp is drawn into every page and the file downloads immediately.
Frequently asked questions
Type CONFIDENTIAL as the watermark text, keep the diagonal angle and click Add watermark — every page gets the stamp.