Fast & Free Online PDF Watermarker
Add Watermark to PDF
Stamp custom text watermarks across every page of your PDF file to protect your copyright and indicate document status.
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Custom Text & Opacity
Choose custom text, angles, and transparency levels to suit any professional requirement.
Local Browser Security
Zero uploads to external cloud servers. Your sensitive documents stay right on your computer.
Permanent Layering
Watermarks are rendered directly into the PDF vector layer for clean printing and viewing.
Frequently Asked Questions
Select your PDF document, type your desired watermark text (e.g. 'CONFIDENTIAL', 'SAMPLE', or your company name), adjust the opacity and angle, and click 'Apply Watermark'. Download your watermarked file instantly.