Image Watermark

Stamp a logo or other image as a watermark on every page of a PDF — opacity-controlled, position-tunable.

Your files never leave your browser. All processing happens on your device — nothing is uploaded.

1. Upload your files (min 2)

Need at least 2 files (have 0).

How does the Image Watermark work?

Stamp a logo or any image as a watermark on every page of a PDF — useful for branding draft documents, deterring unauthorised redistribution, or marking confidential exports. Opacity-controlled (15-30% is the standard "background watermark" look) and position-tunable (center for the classic full-page watermark; corners for subtle branding). For text watermarks like "DRAFT" or "CONFIDENTIAL", use Add Watermark instead.

🔒 Security & Privacy

All processing happens on your device. Your files never leave your browser, never touch our servers, and are not stored anywhere. Close the tab and the file is gone.

📱 Use it on any device

Works in any modern browser — Mac, Windows, Linux, iPhone, Android, and tablets. No installation, no app to download. Just open the page and start.

⚡ Quick & easy

Drag, drop, click. Most files process in seconds, not minutes. No watermarks added to your output, no per-day limits, and the tool always shows the result before asking you to download.

🎁 Always free, no signup

Free to use, every time. No account creation, no email required, no “trial” that converts to a paid plan. We make money from ads so you don’t have to pay.

Frequently asked

Add Watermark stamps text. This stamps an IMAGE — perfect for logos.

For heavier PDF workflows

Amazon affiliate
Adobe Acrobat Pro (subscription)
Industry-standard PDF suite
Shop on Amazon
Nitro PDF Pro (one-time license)
Shop on Amazon
Portable document scanner (ADF, duplex)
Shop on Amazon

As an Amazon Associate we may earn from qualifying purchases. This does not add cost for you.

Related PDF tools

Add Watermark to PDF
Stamp custom text on every page — diagonal, horizontal, or footer position. Customise size + opacity. Drop several PDFs to watermark them all at once and download a ZIP.
Confidentiality Stamp
Stamp a configurable confidentiality marker (header band + footer band, with optional date and recipient) onto every page of a PDF.
Add Image to PDF
Insert a PNG or JPG image into an existing PDF at any page and position — for stamps, signatures, logos, or photos.
Watermark by Pattern (Tile)
Tile a watermark text repeatedly across the entire page in a diagonal grid — for documents you want strongly marked.

More tools you might like

Hand-picked tools that pair well with this one — same audience, same intent.

Add Watermark to PDF
PDF

Stamp custom text on every page — diagonal, horizontal, or footer position. Customise size + opacity. Drop several PDFs to watermark them all at once and download a ZIP.

Add Image to PDF
PDF

Insert a PNG or JPG image into an existing PDF at any page and position — for stamps, signatures, logos, or photos.

Watermark by Pattern (Tile)
PDF

Tile a watermark text repeatedly across the entire page in a diagonal grid — for documents you want strongly marked.

Confidentiality Stamp
PDF

Stamp a configurable confidentiality marker (header band + footer band, with optional date and recipient) onto every page of a PDF.

Batch Watermark PDFs
PDF

Stamp the same watermark across a folder of PDFs — diagonal / horizontal / footer position, with size and opacity controls.

Replace Image Area
PDF

Replace an image area on a PDF page — white-out the existing rectangle, then overlay your new image scaled to fit.

Crop PDF
PDF

Trim margins off every page of a PDF — specify how many points to remove from top, right, bottom, and left.

Image Dimensions + Aspect Ratio Calculator
Calc

Resize an image to a target dimension while preserving aspect ratio. Reports the GCD-simplified ratio (16:9, 4:3 …) and total megapixels.

Related guides

Long-form editorial covering the topics behind our tools.