How to Add a DRAFT Watermark to a PDF (Free)

Stamping "DRAFT" diagonally across a document is the fastest way to signal it isn't final — before a review, before it's shared beyond a small group, or before a numbered revision replaces it. Here's how to add one to a PDF for free, in your browser, in under a minute.

Step by step

1. Open Add Watermark. Go to Add Watermark to PDF and upload your file — it loads locally in your browser and is never sent to a server.
2. Click the DRAFT preset. The text field has one-click buttons for DRAFT, CONFIDENTIAL, SAMPLE, APPROVED, COPY, and DO NOT COPY, so you don't need to type it — or enter your own custom text if none of those fit.
3. Set the angle and opacity. 45° is the standard diagonal draft-stamp look. Keep opacity low enough (around 20–30%) that the underlying text stays readable through the stamp.
4. Download. The watermark is rendered into every page and flattened into the file itself — it isn't a removable annotation layer, and it survives being reprinted, reshared, or reopened in any PDF viewer.

Why you can't do this in Preview on Mac

Apple's Preview app is the default PDF viewer on macOS, and a lot of people reasonably expect it to have a watermark or stamp tool somewhere in its markup toolbar. It doesn't — Preview's markup features cover signatures, shapes, highlights, and text boxes, but there's no dedicated watermark feature and no way to apply one mark across every page at once. Placing a text box on each page by hand is the closest workaround, and it's tedious past a handful of pages. Running the watermark tool in any browser on macOS does the same job in one pass, without leaving Preview's ecosystem or installing anything.

A watermark on the file vs. a watermark when printing

These are two different things, and it's worth being clear on which one you actually need. Some printer drivers and print dialogs can stamp "DRAFT" onto the physical page as part of printing — but that mark only exists on that one printout. The PDF file itself is untouched, so reprinting later, or sharing the file digitally, won't carry the mark at all. Watermarking the file, as described above, bakes the stamp into the PDF itself, so it shows up every time the file is opened, printed, or forwarded — which is what you want if the goal is marking a document as a draft rather than just one physical copy of it.

Beyond DRAFT: other common stamps

The same process works for any short status stamp — CONFIDENTIAL for documents that shouldn't circulate widely, SAMPLE for preview copies sent before a purchase, APPROVED for signed-off internal documents, or COPY / DO NOT COPY for physical-security use cases. All six are one click away in the editor; anything else can be typed in directly, along with a custom color, font, and rotation.

Privacy note

Watermarking a document you're not ready to finalize is often exactly the moment you don't want it leaving your machine. The whole process — reading the PDF, stamping every page, and generating the download — runs locally in your browser; the file is never uploaded.

Summary

• Add Watermark to PDF has one-click DRAFT, CONFIDENTIAL, SAMPLE, APPROVED, COPY, and DO NOT COPY presets.
• Preview on Mac has no watermark feature — this tool works the same way in any Mac browser.
• A file watermark persists across reprints and reshares; a print-time watermark only marks one printout.
• Everything runs locally — the PDF is never uploaded.