PDF Watermark
Stamp your own watermark text — like CONFIDENTIAL or your company name — diagonally across every page of a PDF. Adjust the opacity, size and color, then download the marked file. Free, fast and fully private.
Drag & drop a PDF here
or click to browse from your device
File: —
How to use
- Click the box above or drag and drop your PDF into it — the page count will appear.
- Type your watermark text and adjust opacity, font size, color and the diagonal option.
- Click Add Watermark & Download.
- Your watermarked PDF downloads automatically with "-watermarked" added to its name.
Tips
- Use low opacity so the watermark does not make the page hard to read.
- A diagonal watermark across the center is harder to remove than a corner stamp.
- Watermarks mark ownership, but they cannot stop someone determined from copying the file.
Frequently Asked Questions (FAQ)
What does the PDF Watermark tool do?
It stamps your own watermark text — like CONFIDENTIAL or your brand name — across every page of a PDF.
How can I customize the watermark?
You can change the text, font size, color and opacity, and choose a diagonal (-45 degrees) or straight placement.
What is the output file named?
The watermarked PDF downloads automatically with -watermarked added to its name.
Can I make the watermark faint so it sits behind the text?
Yes. Lower the opacity setting so the stamp appears lightly behind the page content instead of covering it.
Is my PDF uploaded anywhere?
No. The watermark is added in your browser, so the file never leaves your device.