Can I remove a watermark after adding it?

If you keep the original file, yes — just re-export without the watermark. But once you flatten a watermarked PDF or send it out, the watermark becomes part of the page content and can't be cleanly stripped without redoing the document. That permanence is exactly why watermarks work as a deterrent.

Will the watermark show up if someone prints the PDF?

Yes. A text watermark is drawn onto the page itself, so it appears on screen, in print, and in any screenshot. That's different from a viewer-only overlay, which some tools use and which disappears the moment the file is printed or converted.

Does watermarking work on scanned documents?

Yes. As long as the file is a PDF — scanned or digitally created — the watermark tool stamps text across every page regardless of what's underneath, including scanned images.

How to Watermark a PDF (CONFIDENTIAL, DRAFT, or Custom Text) — Free

Stamp CONFIDENTIAL, DRAFT, or your own text across every page of a PDF in seconds. Free, private, and runs entirely in your browser — no upload, no signup.

Sending a draft contract, a confidential report, or a proposal you don’t want copied? A watermark is the fastest way to make that clear on every single page, without redesigning the document. Here’s how to add one in under a minute — free, and without uploading your file anywhere.

The quick fix

Open the Watermark PDF tool.
Add your PDF.
Type your text — CONFIDENTIAL, DRAFT, SAMPLE, your company name, whatever fits.
Adjust the size, opacity, rotation, and position if you want it more subtle or more obvious.
Download. Every page now carries the stamp.

Because it runs entirely in your browser, a 200-page contract watermarks just as fast as a 2-page memo — no upload wait, no file-size cap, and the document never leaves your device. That matters for exactly the kind of files people watermark: things they don’t want floating around on a third-party server.

Choosing text, size, and position

There’s no single “correct” watermark — it depends on what you’re trying to signal:

Diagonal, semi-transparent, large — the classic look for CONFIDENTIAL or DRAFT. It’s impossible to miss but doesn’t fully obscure the text underneath. Good default opacity is around 20–30%.
Small, corner-placed — better for a subtle “Property of [Company]” tag on something you still want to look clean and presentable, like a portfolio or sample work.
Bold and centered — the strongest deterrent. Use it when you genuinely don’t want the document treated as final, like an early-stage draft going out for review.

A rule of thumb: the more sensitive or unfinished the document, the larger and more central the watermark should be. A quiet corner stamp is easy to crop out of a screenshot; a large diagonal one across the middle isn’t.

Watermark, then lock it down

A watermark alone won’t stop someone from editing the file and deleting it — text layers in a PDF can usually be selected and removed by anyone with basic editing tools. If you actually need the watermark to stick, pair it with:

Flatten the PDF. The Flatten PDF tool converts form fields, annotations, and layered content into fixed page content, which makes the watermark much harder to peel off cleanly since it’s now baked into the page rather than sitting as an editable object.

Add a password. The Protect PDF tool encrypts the file with AES and can restrict editing entirely, so recipients can view and print but can’t open it in an editor to strip your watermark out. Combine watermark + protect for anything genuinely confidential — a term sheet, an NDA draft, or financials you’re sharing before a deal closes.

Common watermark use cases

Draft contracts and proposals. Stamping DRAFT prevents a work-in-progress version from being mistaken for the final signed copy — a real problem when documents get forwarded around a negotiation.

Confidential reports. Internal financials, HR documents, or anything under NDA benefits from a visible CONFIDENTIAL mark, especially if the PDF might get forwarded outside its intended audience.

Sample or portfolio work. Photographers, designers, and writers often watermark low-res previews they share publicly, keeping the clean, unmarked version for the paying client only.

Copy protection for course materials or ebooks. A Licensed to [Name] or Do not distribute watermark, ideally combined with password protection, discourages casual reselling of digital products.

Keep your documents private

Most “add watermark to PDF” tools online require you to upload your file to their servers first — which is the last thing you want for a document sensitive enough to need a CONFIDENTIAL stamp in the first place. The Watermark PDF tool does everything locally in your browser: no upload, no account, and it works offline once the page has loaded. Stamp it, lock it down with Protect PDF if needed, and your file never leaves your device.