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Add Watermark to PDF Files

Stamp customized text watermarks onto your PDF document. Control font sizes, rotation angles, and transparency levels perfectly.

Select a PDF file
Drag & drop a PDF here, or click to browse
Customize Watermark Style
Font Size60 px
Opacity30 %
Angle45 °
Stamping Watermark... 0%
🎉 Watermark Stamped Successfully!
Download Watermarked PDF

Angle Rotation

Set a custom diagonal, horizontal, or vertical angle text overlay.

Transparency

Blend the watermark into background gracefully using advanced opacity control.

Strict Privacy

Files are permanently and automatically deleted from our servers.

How to Watermark PDF Online

1

Upload Document

Drag and drop your PDF file or click browse to import it safely into our web toolkit.

2

Tweak Overlay Style

Type your copy (like 'SAMPLE') and use sliders to change font size, angle, and opacity.

3

Stamp & Download

Click "Add Watermark". Our AI engine duplicates the layout on every page instantly for download.

Frequently Asked Questions

Is this PDF watermark tool completely free?
Yes, ToolTiny's PDF Watermarker is 100% free with no monthly subscription limits, no usage counts, and zero sign-ups needed.
Will the text block override my original document tables?
No, by managing the opacity bar (e.g. setting it to 20% or 30%), the watermark will sit as a transparent background overlay. Your text, lines, and tables remain fully legible underneath.
Is my secure corporate file safe on your server?
Absolutely. All files are transferred via end-to-end SSL encryption protocol. The source document and the resulting stamped output are auto-purged from the workspace cache within 10 minutes.

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