Watermark PDF
This free watermark PDF tool stamps custom text like CONFIDENTIAL or DRAFT across every page, with a live preview as you tweak it. Drop a PDF, style the mark, and download the result — the file is processed entirely on your device.
Layout
Size
How to use Watermark PDF
- 1 Drop your PDF onto the box or click to browse for it.
- 2 Type the watermark text and pick a layout: Diagonal, Tiled, or Horizontal.
- 3 Choose a size, then adjust the opacity slider and color to taste.
- 4 Check the live page-1 preview, click Add watermark, and download the stamped PDF.
Frequently asked questions
Is my PDF uploaded to a server?
No. The watermark is applied locally in your browser, so the document never leaves your device — safe for confidential contracts and drafts.
Does the watermark appear on every page?
Yes. The chosen text is stamped onto every page of the PDF using your selected layout, size, opacity, and color.
Can I control how the watermark looks?
Yes. Pick a Diagonal, Tiled, or Horizontal layout, choose Small, Medium, or Large size, set opacity from 5% to 60%, and pick any color.
Does the watermark tool work offline?
Yes. GoodWebTools is a PWA, so once loaded it keeps watermarking PDFs with no internet connection.
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