Watermark PDF
Stamp text like DRAFT or CONFIDENTIAL across every page.
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The watermark sits on top of the page, so the text underneath can still be copied. It labels a document — it doesn’t lock or hide anything.
or drag it here
One PDF file
Your files stay on your device
How to use it
Drop your PDF and type a word like DRAFT or CONFIDENTIAL to stamp across every page. We never add a mark of our own. Your file stays private.
A watermark tells readers what a document is: DRAFT so nobody shares an unfinished version, CONFIDENTIAL so they handle it with care, or your company name on a sample.
Drop your PDF onto the box above and type your text. Around 20–30% see-through is the sweet spot — easy to notice, still easy to read through. Tilted text, at 45°, looks most like a watermark.
Turn on “Repeat across the whole page” to cover the page in your text. It’s harder to crop out of a screenshot, but a little busier to read.
Good to know: a watermark labels a document, it doesn’t lock it. The text underneath can still be copied, and someone determined could remove the mark.
FAQ
How see-through should it be?
About 20 to 30 percent works for most documents — visible at a glance, but the text underneath stays easy to read.
Does a watermark protect my document?
No. It labels it, but the text underneath can still be copied and the mark can be removed.
Can I watermark just some pages?
It marks every page. To mark only some, split those pages out, watermark them, then merge them back.
Do you add your own watermark?
Never. The only mark is yours.
How it worksFor the curious
The watermark is drawn onto every page with pdf-lib as real text, rotated and at the opacity you set, so it stays sharp at any zoom and prints exactly as shown.
It is drawn over the existing page content, which is left untouched underneath. That is why the original text remains selectable and why the mark can be removed with PDF-editing software. To stop a document being read or changed, a watermark is the wrong tool.
The mark is applied to every page in one pass. To watermark only some pages, split them out, watermark them, and merge the document back together.