Can readers still select or read the underlying text?

Yes, the semi-transparent watermark overlays without obscuring or erasing the document content.

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PDF Watermark Tool

Stamp custom text watermarks (e.g. 'CONFIDENTIAL') across all PDF pages.

How to Use PDF Watermark Tool

1Upload your PDF file.
2Enter custom watermark text (e.g. 'CONFIDENTIAL', 'DRAFT', 'DO NOT COPY').
3Adjust opacity and font size sliders.
4Click Apply Watermark and download your stamped PDF.

Key Features & Benefits

Custom text watermarking across every page
Diagonal 45-degree angle and opacity transparency controls
Uses clean standard Helvetica Bold vector typography
Completely in-browser: confidential documents never leave your computer

About PDF Watermark Tool

Protect and brand your documents with custom text watermarks. Customize watermark text, rotation angle (45° diagonal), opacity, and font size with live client-side PDF stamping.

Unlike traditional web tools that send your personal data, uploaded photos, or sensitive text to remote cloud servers, our PDF Watermark Tool operates strictly inside your client browser sandbox. This guarantees high processing speeds without network throttling, and ensures your data privacy is completely preserved.