Add Watermark

Stamp text watermarks across every PDF page.

  • 100% free
  • Private in browser
  • No signup
  • No watermarks
Select PDF fileTap to choose a file

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About Add Watermark

Mark drafts and client PDFs without a desktop editor. Add Watermark to PDF on TheToolss stamps CONFIDENTIAL, DRAFT, or your brand across every page with opacity, font size, and angle controls. Upload, preview the stamp treatment, and download a watermarked file for sharing. Processing stays in your browser when possible — free, private, and signup-free for everyday document workflows.

How to use Add Watermark

  1. Upload your PDF.
  2. Enter watermark text and adjust opacity, size, and angle.
  3. Download the watermarked PDF.

Key features

  • Text watermark on all pages
  • Opacity, size, and angle controls
  • Diagonal stamp by default
  • Useful for drafts and brand marks
  • Private browser processing

Frequently asked questions

Is it free?
Yes. Watermark PDFs free on TheToolss with no signup.
Can I use an image watermark?
This version supports text watermarks for fast stamping.
Is my PDF uploaded?
Browser-side tools process files on your device whenever the tool runs locally.
Will the watermark be removable?
It is drawn into page content; treat it as a visible stamp, not DRM.
Can I watermark only one page?
This tool applies to all pages. Split the PDF first for a single page.
Add Watermark to PDF Free Online — Stamp Pages | TheToolss