Add a watermark to a PDF
Stamp text like “CONFIDENTIAL” or “DRAFT” across your pages. Adjust size, angle and transparency with a live preview.
- Files never uploaded
- Free, no sign-up
- Works on any device
- Works offline
Drop your file here
or drag and drop · One PDF file
Stays on your device — nothing is uploaded
How to watermark PDF
Choose a PDF
Drop the PDF you want to watermark.
Design the watermark
Type your text and adjust size, angle, color and transparency.
Download
Save the watermarked PDF.
About Watermark PDF
Can a watermark be removed?
The watermark is added to the page content, so it can’t be switched off like a comment. Someone with professional PDF editing software could still edit it out — a watermark discourages copying but isn’t a lock. To control who can open a file, use Protect PDF.
Your files never leave your device
Most online PDF sites upload your documents to their servers. DocuVault doesn’t. Everything happens inside your browser, so there is nothing for anyone to see, store or leak.
Check it yourself
Use a tool once, then turn off your Wi-Fi or switch to airplane mode and use it again — it still works. Developers can watch the Network tab: no file is ever sent.
Step 1
You choose a file
Your browser opens it directly from your device — like opening it in an app.
Step 2
Your device does the work
The processing code runs inside this browser tab. No server ever receives your file.
Step 3
You save the result
The new file goes straight to your downloads. Close the tab and everything is gone.
Frequently asked questions
Which characters can I use?
Watermarks support standard Latin characters (A–Z, accents, numbers and common symbols).
Does it add the watermark to every page?
Yes, the watermark is placed in the center of every page.