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PDF Watermark & Stamp

Stamp custom text watermarks on your PDFs to prevent copying.

100% Client-Side (Data never leaves your device)

100% Client-Side Processing

PDF Watermark & Stamp

Prevent copying by stamping custom text watermarks across all pages of your PDF document.

Upload Source PDF

Watermark Text

* English/Latin characters only for best font compatibility.

Watermark Settings

Color

Opacity30%

Font Size60px

Rotation45°

How to Use PDF Watermark & Stamp

Upload the PDF file you want to watermark.
Type your desired text (e.g., CONFIDENTIAL, Do Not Copy).
Adjust font size, transparency, color, and rotation angle.
Apply the changes to stamp all pages of the PDF instantly.

คำถามที่พบบ่อย — PDF Watermark & Stamp

Nowhere. The PDF Watermark & Stamp operates entirely client-side. Your files are processed inside your browser and are never uploaded to any remote servers, ensuring maximum privacy.

Since processing runs locally, the maximum limit depends on your device's memory (RAM) and browser limits. We suggest uploading moderately sized files for optimal speed.

The tool exports your files in high-quality, standard formats (like PNG, JPG, or PDF) that are fully compatible with external editors and viewers.

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