Watermark PDF
Add a watermark to a PDF
Three simple steps
How Watermark PDF works
Upload PDF
Drop your file
Style mark
Text, position, color, opacity
Download
Watermarked PDF
Built for you
Why use PDFLabz?
100% Private
Files never leave your browser.
Free, no signup
Unlimited use, no account.
No watermarks
Clean, untouched output.
Works everywhere
PC, Mac, phone, tablet — all browsers.
FAQ
Frequently asked questions
Can I use my own image as a watermark?
Currently text-only with full control over font, color, opacity and position. Image watermark is on the roadmap.
Does the watermark appear on every page?
Yes — applied uniformly across every page in the file.
Is Watermark PDF really free?
Yes — every tool on PDFLabz is free with no daily limit, no account, and no watermark.
Are my files private?
100%. This tool runs entirely in your browser using JavaScript. Your files never reach our servers.
Is there a file size limit?
Up to 100 MB per file. Larger files just take longer because everything runs locally on your device.
Do I need to install anything?
No installation. Any modern browser (Chrome, Firefox, Safari, Edge) on any OS works.
Privacy first
This tool runs entirely in your browser. Your file never reaches our servers.