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Watermark PDF

100% Client-Side

Watermark PDF stamps visible text overlays diagonally across your pages. The script injects custom text content as transparent vector text nodes on top of page content streams locally, making it ideal for marking drafts, copyrights, or confidential tags.

Open Watermark PDF

How It Works

1

Select PDF

Upload the PDF document you want to stamp with a watermark.

2

Enter Text

Type your custom watermark text (e.g. DRAFT, CONFIDENTIAL) and adjust opacity settings.

3

Apply & Save

Click Watermark PDF to stamp the pages in-memory and download the copy.

Frequently Asked Questions

Can I customize the opacity of the watermark text?

Yes, you can choose transparency levels to ensure the text remains legible beneath the watermark.

Is the watermark text editable after downloading?

No, the text is drawn as a flat vector element inside the page stream, making it difficult to remove.

Can I select a custom font?

The tool uses standard, high-compatibility PDF fonts to guarantee the output displays correctly on all devices.