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Add Watermark

Add a custom text watermark to every PDF page.

How it works

Step 1

Upload your file

Drag & drop or click to select your PDF from your device, Google Drive, or Dropbox.

Step 2

Process

Our servers instantly run Add Watermark on your file — no plugins or software required.

Step 3

Download

Your result is ready in seconds. Click download and you're done.

Frequently asked questions

How do I add a watermark to a PDF for free?
Upload your PDF, enter the watermark text (e.g. CONFIDENTIAL or DRAFT), adjust opacity and position, and click 'Add Watermark'. Download the watermarked PDF instantly.
What watermark text should I use?
Common choices: CONFIDENTIAL (for sensitive documents), DRAFT (for work in progress), SAMPLE (for proposals), DO NOT COPY (for proprietary materials), or your company name for branded deliverables.
Can I control how transparent the watermark is?
Yes. The opacity slider lets you set transparency from very faint (10%) to solid (100%). A 30–40% opacity is standard for a visible but non-intrusive watermark.
Can I add a logo watermark instead of text?
The text watermark tool adds customisable text stamps. For image/logo watermarks, look for the image watermark option in the tool settings.
Is the watermark permanent?
Yes. The watermark is embedded into the PDF page content — it cannot be removed with a standard PDF viewer. For document security, also use Protect PDF to password-protect the file.
Can I add a watermark to a PDF on iPhone?
Yes — open Safari, go to pdftoolz.io/tools/add-watermark, upload your PDF from the Files app, configure the watermark, and download. No app needed.