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FastToolAI

Add Watermark to PDF

Add a watermark to your PDF online for free

Add text watermarks to PDF files for copyright protection, source labeling, or internal document marking.

Single PDF fileText watermarkPreview before downloadBrowser-based processing

Drop PDF file here

or

PDF file supported

Your file is processed locally in the browser and never uploaded to a server.

Browser Local Processing

Your PDF is processed in your browser and is not uploaded.

Safe and Reliable

Files are not stored, and temporary data is cleared after the session.

Free to Use

Add a text watermark and download your PDF without signing up.

Multi-platform Support

Works in modern browsers on Windows, Mac, phones, and tablets.

How to Add a Watermark to PDF

1

Upload your PDF file

Choose or drag one PDF file into the upload area.

2

Set watermark options

Enter text and adjust style, position, and opacity.

3

Preview the watermark

Generate a preview and confirm the watermark looks right.

4

Download the watermarked PDF

Save the same generated result to your device.

Why Choose FastToolAI Add Watermark to PDF?

  • Easy to use: Add a watermark to your PDF in a few steps.
  • Text watermark support: Enter custom text and adjust the style.
  • Local processing: Your file is processed in the browser.
  • Customizable settings: Adjust opacity, rotation, color, position, and size.
  • No sign-up required: Open the tool and start immediately.

Common Use Cases for Adding Watermarks to PDF

  • Contract marking: Add confidentiality notes to contracts or agreements.
  • Copyright protection: Add ownership or source labels to documents.
  • Internal documents: Mark internal files, training material, or process documents.
  • Brand labeling: Add brand text to improve recognition.
  • Document archiving: Add status or purpose labels to archived PDFs.

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FAQ

Can I add a watermark to PDF for free?

Yes. This tool is free to use and does not require sign-up.

What types of watermarks are supported?

V1 supports text watermarks with text, opacity, font size, rotation, color, and position controls.

Can I customize the watermark position and opacity?

Yes. You can place the watermark in the center or corners and set opacity from 10% to 100%.

Will adding a watermark reduce PDF quality?

The tool overlays a text watermark image onto each page and keeps the original PDF content intact as much as possible.

Can I edit the PDF after adding a watermark?

The output is a standard PDF file and can be opened in PDF editors that support further editing.

Are my files uploaded to a server?

No. The PDF is read and generated locally in your browser.

Can I add PDF watermarks on mobile?

Yes. You can upload, configure, preview, and download the PDF in a mobile browser.

Which browsers are supported?

Modern versions of Chrome, Edge, Safari, and Firefox are supported.