Watermark PDF — Free Online
Stamp DRAFT, CONFIDENTIAL, or any custom text on every page of your PDF. Adjust opacity and angle. No signup.
MergeAny combines two or more JPG, JPEG, or PNG images into a single file directly in your browser — vertically, horizontally, or in a grid. There is no upload limit, no watermark, and your files are deleted from our servers seconds after merging. Works on Windows, Mac, iPhone, and Android with no install and no signup.
How to Watermark a PDF Online
Upload Your PDF
Drag and drop or browse to select your PDF — no account required.
Customize Your Watermark
Enter your watermark text, adjust opacity (0.1–1.0), rotation angle, and font size.
Download Watermarked PDF
Click Watermark PDF and download the file with your mark on every page.
Common Watermark Use Cases
A DRAFTwatermark signals to reviewers that the document is not final and should not be actioned. It's standard practice in legal, financial, and editorial workflows to mark all internal review copies this way.
A CONFIDENTIAL mark communicates that the document contains sensitive information and should not be circulated beyond the intended recipient. This is widely used in contracts, HR documents, board papers, and investor materials.
A SAMPLE watermark is used by service providers — photographers, designers, consultants — to share work-in-progress or preview deliverables without releasing the final product until payment is confirmed.
MergeAny stamps watermarks using ReportLab's canvas drawing engine, which generates a precise overlay page at the correct page dimensions, and pypdf's page merge capability then composites that overlay onto your existing page without touching the underlying content stream.
Watermark PDF Features
Secure and customize your documents with professional text watermarks.
Custom Text
Type any watermark — DRAFT, CONFIDENTIAL, SAMPLE, your company name, or anything else.
Opacity Control
Set transparency from 5% (barely visible) to 100% (fully opaque) for exactly the look you want.
Rotation Control
Set the watermark angle — 45° diagonal is the classic choice, 0° gives horizontal text.
Every Page Stamped
The watermark is automatically applied to every page in your PDF, uniformly.
Privacy First
Your file is processed in memory and deleted immediately after you download it.
No Signup Needed
Free, browser-based tool. Works on Windows, Mac, iPhone, Android, and tablet.