What is Watermark PDF?
Add a watermark to a PDF online free, without uploading it. Stamp your own text across every page at any opacity — processed entirely in your browser. It runs entirely in your browser, so there's no upload, no server involved, and no account required.
When to Use Watermark PDF
Use Watermark PDF when you need to:
- Document branding
- Confidentiality
- Draft marking
How to Use Watermark PDF
- 1.Upload the PDF you want to watermark.
- 2.Type the text you want stamped across every page.
- 3.Adjust the opacity slider from a faint mark to a bold one — size adjusts automatically to fit.
- 4.Download the watermarked PDF. It's drawn permanently into the page, so keep your original if you'll need an unmarked copy later.
Frequently Asked Questions
Can I control how visible the watermark is?
Yes — an opacity slider goes from a faint stamp to a bold, hard-to-miss one. The size adjusts automatically so long text still fits on the page.
Does the watermark apply to every page?
Yes, the same text is stamped diagonally across every page of the document in one pass.
Can I remove the watermark afterward?
Not from this tool — it's drawn permanently into the page content, the same as it would be from any PDF watermarking tool. Keep your original file if you need an unmarked copy.
Privacy & Security
Your watermark pdf operations are 100% private:
- Nothing is uploaded to a server
- No account or sign-up required
- Works completely offline after the page loads
- All processing happens on your device
- No tracking or analytics on your files
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