Watermark PDF Online Free

Stamp text on every page — Confidential, Draft, your name, or company. Private in your browser.

Drop a PDF file here

or

Your files never leave your browser

Use this free PDF watermark tool to mark documents as draft, confidential, or with your name. Adjust opacity and position, then download — no upload to our servers.

How to Watermark a PDF

1

Upload PDF

Drop or select the PDF you want to stamp.

2

Set text & style

Choose text, opacity, size, color, and diagonal or corner placement.

3

Download

Apply and save the watermarked PDF — free, no email.

Frequently Asked Questions

Is it free to watermark a PDF?

Yes. Site95 Watermark PDF is free with no signup, no account, and no Site95 branding on your file — only the text you choose.

Do my files upload to a server?

No. Watermarking runs entirely in your browser with pdf-lib. Your PDF never leaves your device.

Can I make a diagonal “CONFIDENTIAL” stamp?

Yes. Enter your text, enable Diagonal, set opacity (e.g. 25–40%), and apply to all pages.

Can I use an image logo as a watermark?

This tool adds text watermarks. For logos, use Image tools or place a logo in another editor, then merge pages if needed.

Will the watermark reduce PDF quality?

Text is drawn as vector text on each page. Your original content is not re-compressed.

Add a Free PDF Watermark in Your Browser

Mark contracts, drafts, and student work with a clear text stamp before sharing. Site95’s watermark PDF tool runs locally so sensitive files stay on your device.

Also try add page numbers, reorder PDF pages, or merge PDFs.