💧 Watermark PDF ☆

Overview

Free Watermark PDF is a free online tool that stamps a text or image watermark on every page of your PDF document. Customize the watermark text, font size, color, opacity, rotation angle, and position, place it diagonally across the center, along the top or bottom, or in any corner. You can also upload a logo or image as a watermark for branding purposes. The tool supports tiled watermarks that repeat across every page, single-position watermarks, and layered placement over or behind the existing content. Watermarking is applied on your own device; the PDF never travels to a remote server. There is no file size limit, no sign-up, and no additional watermark added by the tool itself. It is ideal for marking documents as "Draft," "Confidential," or "Sample," adding copyright notices, branding company reports with logos, stamping receipts with approval status, or protecting intellectual property before sharing documents externally. Watermark PDFs from Windows, macOS, Linux, iOS or Android. No desktop software required.

How watermarking works

The watermark, text or image, is drawn into each page as a new layer, either behind the content or on top of it, with your chosen opacity, rotation, size and position. Tiled mode repeats it diagonally across the whole page for documents that must not be reused unnoticed. Because the watermark is added as vector or embedded-image content, it stays sharp at any zoom, and the underlying page content is copied without re-rendering.

Capabilities and constraints

Property	Watermark PDF behavior
Watermark types	Text or uploaded image/logo
Styling	Font size, color, opacity, rotation, position
Layouts	Single placement or tiled across the page
Layering	Over the content or behind it
Quality	Sharp vector text; page content copied as-is
Processing	100% client-side, no upload
Cost	Free, no account, no watermark added by the tool itself

Privacy: documents never leave the browser

Draft reports, legal documents and client deliverables are common watermarking cases. Every page is processed locally, nothing is transmitted or stored, and the page works offline after loading.

Watermarking that looks professional

• Keep opacity low (10-20%) for background tiling so text stays readable.
• Use a diagonal angle for draft marks and horizontal for footers.
• Prefer a small logo in a corner for branding rather than a large centered mark.
• Use tiled marks to discourage screenshot reuse of sensitive documents.
• Keep the unwatermarked original for your own archive.

Related: browse all PDF tools to protect, sign, merge or compress documents.

Watermark design: text, opacity and tiling

A watermark is a compromise between visibility and distraction, and a few settings decide which side it lands on. Opacity is the first: values around 10-20% keep the text readable while making the mark unmistakable in a screenshot, whereas a 50% stamp can make a document unusable. Rotation across the diagonal is the classic choice because it crosses both margins and is hard to crop away. Placement is a design decision: a single centred mark suits status labels such as DRAFT or CONFIDENTIAL, while tiling repeats the mark across the page and makes removal by editing far harder, useful for documents that must not be repurposed. Colour should contrast with the page without competing with the content; light grey works on white, and the same grey is invisible on a dark scan, so check the source. Text watermarks are searchable and can carry a recipient name or date, which is how confidential leaks are traced; image watermarks suit logos but must be supplied at high enough resolution to avoid blur. Page range matters too: stamping every page including a cover is rarely wanted, and applying the mark only to the body keeps the presentation clean. Finally, decide whether the mark should sit above the content or behind it, behind keeps reading comfortable, above guarantees it cannot be hidden. Everything is processed locally in your browser.