Watermark PDF Online

A watermark is text or a logo layered over every page of a document to show who it belongs to, mark it as a draft, or discourage unauthorised copying. This tool adds one to your PDF directly in the browser, with full control over how it looks and where it sits, no design software or Adobe Acrobat required.

What adding a watermark actually does

The watermark is drawn as a new, semi-transparent layer on top of your existing PDF content on the pages you choose. Nothing in the original text, images, or layout is altered, the watermark simply sits above it at the opacity, rotation, and position you set. The result is a normal PDF file that opens in any reader, just like the original.

Text watermark or logo watermark, which should you pick?

A text watermark is the fastest option: type "CONFIDENTIAL", "DRAFT", a company name, or a copyright line, and it stamps every selected page instantly. A logo watermark takes a little more setup since you need an image file first, but it looks more professional and reinforces your brand, especially with a transparent PNG that blends cleanly into the page.

Single placement or tile mode, which is more secure?

A single watermark in a corner or the center looks clean and is the right choice for most contracts, reports, and presentations. Tile mode repeats the watermark in a grid across the whole page, making it far harder to crop or edit out, which is why it's the standard choice for confidential documents and drafts. The tradeoff is that tile mode covers more of the page, so keep the opacity low if you use it.

When to use this tool

• Drafts and work-in-progress documents: stamp "DRAFT" diagonally across every page so nobody mistakes it for the final version.
• Confidential or sensitive files: mark contracts, financial statements, or internal reports as restricted before sharing them.
• Branded reports and proposals: add your company logo to every page for a consistent, professional look.
• Copyright protection: tile a copyright notice or your name across shared PDFs to discourage unauthorised reuse.

How to watermark a PDF on Windows

Windows has no built-in way to stamp a PDF. Open this page in any browser, upload your PDF, style your text or logo watermark, and click Add Watermark. The finished file downloads straight to your device, no Adobe Acrobat needed.

How to watermark a PDF on Mac

macOS Preview doesn't offer true PDF watermarking, only basic annotations that sit in a fixed spot and can't be tiled or made transparent. Use this tool instead for full control over opacity, rotation, and placement across every page.

How to watermark a PDF on iPhone or Android

This tool works in any mobile browser, Safari on iPhone or Chrome on Android. Open the page, tap the upload area, choose your PDF from Files or Google Drive, style the watermark, and download the result. No app to install.

What you get after watermarking your PDF

The output is a standard PDF that downloads directly to your device, with the watermark baked into the pages you selected. All original content is preserved exactly as it was. If you watermarked multiple files, each downloads separately or you can grab them all in a single ZIP.