Marking a PDF as “Draft,” “Confidential,” or branding it with a company name doesn’t require a paid subscription. A watermark is just text (or a logo) layered across every page, and there’s a free, browser-based way to add one in under a minute.
A watermark isn’t decoration — it’s a signal. “Draft” tells a reader not to treat the document as final. “Confidential” sets an expectation before anyone reads a word further. A company name or logo across sample pages discourages someone from passing your work off as theirs. In every case, the job is the same: make the label visible on every page without touching the content underneath it.
How to add a watermark
Three steps get you there. First, go to the Add Watermark to PDF page and add your file, up to 25 MB. Second, set your text, position, and opacity: type the watermark text — “Draft,” “Confidential,” “Sample,” a company name, whatever fits — choose where it sits on the page and how transparent it is, light enough to stay out of the way of the real content, dark enough to be unmistakable, or switch the panel to Image and upload a JPG or PNG if you’d rather use a logo than type anything. Third, download the watermarked file — the watermark is stamped into every page permanently, part of the file now rather than an overlay that disappears when someone else opens it in a different viewer.
The most common mistake is a watermark that’s too heavy or too light. Too dark, and it fights with the text underneath, especially on pages with dense paragraphs; too light, and it’s easy to miss or crop out in a screenshot. A mid-range opacity, angled diagonally across the page, tends to stay legible from a normal reading distance while still being obviously present the moment someone glances at the page.
Watermark vs. stamp
Watermark and stamp are two different jobs, even though people use the words interchangeably. A watermark repeats one mark across the whole page, usually on a diagonal — right for a label meant to travel with every page and be impossible to crop out: “Draft,” “Confidential,” a client name on sample work. It’s the wrong shape for a mark that’s making a statement about the document rather than labelling it — an “APPROVED” or “PAID” badge, a signature, a company seal — since those belong in one corner, out of the way of the content, and repeating them across the page just looks broken. How to Add a Stamp to a PDF handles that case instead. Need a photo or diagram placed on just one specific page rather than repeated across all of them? How to Insert a Photo into an Existing PDF Page covers that single-page case.
A watermark also doesn’t stop someone from copying your document, and it isn’t meant to — it’s a visible label, not a security control, and it won’t stop someone from copying text, editing the file, or reprinting it without the mark. If you need to actually restrict what someone can do with a PDF, that’s a different job: see How to Password-Protect a PDF to require a password to open it, or password-protect a PDF against printing specifically.
A few things worth doing after watermarking: add page numbers if the document is heading somewhere formal (see numbering pages for court, legal, or business documents); compress it before emailing a large file; password-protect it if the watermark alone isn’t enough; and if it’s a draft on its way to a client, How to Send Documents Securely to Clients covers the rest of the checklist. Need the watermark and reordering, page numbers, or a split in one go? Edit PDF has all of it in one toolbar.
Add it with the free Add Watermark to PDF tool — no registration wall, no second watermark of ours added, and the file is gone right after processing.