Can I add a logo or image watermark?

This tool adds text, up to 120 characters, to every page. Use the PDF editor if you need to place an image manually.

Does a watermark prevent changes to the PDF?

No. It is a visible label, not encryption or access control. Choose a position and opacity that leave the document readable, then inspect the downloaded copy.

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Watermark PDF

Add Watermark to PDF Online

Watermark a PDF online with centered, top or bottom text and download a new protected-looking copy.

PDFChoose or drop a PDFOne PDF up to 50 MB

Watermark text

Watermark position

Center diagonal Top Bottom

Watermark opacity

Use 10 for subtle and 80 for strong.

I have permission to process this PDF and respect its owner's rights.

How to add a watermark to a PDF online

Choose a PDF from your device.
Enter watermark text and choose placement.
Select opacity and confirm permission.
Download the watermarked PDF.

Supported inputs

Standard PDF documents
Watermark text up to 120 characters

Available outputs

Watermarked PDF document
Temporary signed download

Why use this tool

Fast text watermarking
Center, top or bottom placement
Adjustable opacity
No account required

Common problems

The watermark looks too faint: Increase opacity and try again. Very busy page backgrounds may need stronger opacity.

Frequently asked questions

Can I add a logo or image watermark?: This tool adds text, up to 120 characters, to every page. Use the PDF editor if you need to place an image manually.
Does a watermark prevent changes to the PDF?: No. It is a visible label, not encryption or access control. Choose a position and opacity that leave the document readable, then inspect the downloaded copy.

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