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How-To Guide4 min readUpdated April 15, 2026

How to Add a Watermark to a PDF Free Online

Add a DRAFT, CONFIDENTIAL, or custom logo watermark to any PDF free. Control opacity, position, and font. No account, works on any device.

Adding a watermark to a PDF marks it as DRAFT, CONFIDENTIAL, or branded with your logo — preventing unauthorised use or clarifying document status. Adobe Acrobat Pro charges $239/year for this. EditDocs AI does it free, in any browser, in under 30 seconds.

How to add a text watermark to a PDF free

  1. 1
    Open the watermark tool
    Go to editdocsai.com/tools/watermark-pdf. No account required.
  2. 2
    Upload your PDF
    Upload the PDF you want to watermark. Multiple pages supported — the watermark is applied to every page automatically.
  3. 3
    Set watermark text and style
    Enter your watermark text (DRAFT, CONFIDENTIAL, DO NOT COPY, your company name, etc.). Choose font size, colour, and opacity. Position: centre diagonal is standard; you can also set top, bottom, or corner.
  4. 4
    Download the watermarked PDF
    Your PDF with the watermark embedded is ready to download. The watermark is part of the document — it cannot be simply deleted by the recipient.

Text watermark vs image/logo watermark

Text watermarks: fastest to apply, universally readable, ideal for DRAFT / CONFIDENTIAL / SAMPLE stamps. Use a diagonal, semi-transparent grey or red text for maximum visibility. Image watermarks: use your company logo as a PNG (with transparent background for best result). Position in corner or centre. Control opacity so the watermark is visible but does not obscure content. In AI Studio, type: "add a watermark with my logo at the bottom right, 30% opacity" and upload both the PDF and PNG logo.

Can recipients remove a PDF watermark?

A standard text or image watermark is rendered into the page content — it cannot be removed by simply editing the PDF properties. However, with advanced PDF editing software (Adobe Acrobat Pro), a determined person can attempt to remove watermarks. For stronger protection, combine watermarks with password protection: add a watermark at editdocsai.com/tools/watermark-pdf, then password-protect the result at editdocsai.com/tools/protect-pdf. This prevents editing while keeping the watermark visible.

Tip: batch watermark 100 PDFs at once
Go to editdocsai.com/batch, select the watermark operation, upload all your PDFs, enter the watermark text, and download a ZIP of all watermarked files. All 100 are processed simultaneously — takes the same time as watermarking one.

Try it free — no account needed, no watermarks, files deleted in 60 minutes.

Add Watermark to PDF Free →

Frequently Asked Questions

Can I add a watermark to just one page of a PDF?+
Yes. In AI Studio, type "add DRAFT watermark to page 1 only" to target a specific page.
How do I make the watermark semi-transparent?+
Set opacity to 30–50% in the watermark tool. At 100% opacity, the watermark fully obscures content underneath. 30–40% is the standard for "visible but not blocking content".
Can I use my company logo as a watermark?+
Yes. Upload your logo as a PNG (with transparent background). In AI Studio, upload both the PDF and PNG and type "add my logo as a watermark".
Will the watermark appear when the PDF is printed?+
Yes. The watermark is rendered into the page content, so it prints exactly as it appears on screen.

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