Evixpdf
Evixpdf

Add Watermark

Stamp a text watermark like CONFIDENTIAL across every page.

Browse all tools

About Add Watermark

Watermark PDF stamps a diagonal text watermark on every page. Choose the text, font size, and opacity. Useful for confidentiality markings, draft labels, and copyright notices.

How it works

  1. 1

    Upload the PDF.

  2. 2

    Set watermark text, font size, and opacity.

  3. 3

    Download the watermarked PDF.

When to use it

  • Mark drafts with "DRAFT" before sharing for review.
  • Add "CONFIDENTIAL" to legal documents.
  • Stamp a copyright notice on distributed PDFs.

Privacy

Files are processed by the Evixpdf engine in-house with the AGPL-free MIT stack — no third-party cloud upload. Sessions auto-purge after processing.

Frequently asked questions

Short answers to the questions people most often ask about Add Watermark. Read the one that matches your situation — they're written to be skimmed.

1Is the watermark removable?
The watermark is added as a content stream — it can be edited by a determined user. Use Flatten PDF afterward to bake the watermark permanently into the page.

Still stuck?

Browse our hand-written guides or ask us directly — we usually reply within a business day.

Read guides Contact support

Related tools

Flatten PDF

Lock form fields and annotations into the page bitmap.

Add Page Numbers

Add page numbers in any style — Arabic, Roman, or alphabetic.

Sign PDF (Test Cert)

Add a real PKCS#7 digital signature to any PDF.

Ready when you are

Try Add Watermark now

No signup, no email required. Drag your file in and you're done in seconds.