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Add a watermark to a PDF

Mark a document as a draft, a copy or confidential, with a soft diagonal stamp on each page.

Drop one PDF hereor click to choose. Your files stay on this device.

    Private by design: this tool runs in your browser. Nothing you add is uploaded.

    How to use it

    1. Drop a PDF into the box.
    2. Type the watermark and choose how strong it looks.
    3. Press "Add watermark" and download.
    Screenshot of the Watermark PDF tool on Sureno, in use
    Watermark PDF in use: a real screenshot of this page.

    Questions and answers

    Can a watermark be removed later?

    It becomes part of each page, so it is not easy to remove — which is the point. Keep your original if you need a clean copy.

    How strong should the watermark be?

    Around 15 to 25 on the "Strength" slider is easy to see but still lets people read the page.

    Is my document uploaded?

    No. The watermark is added in your browser and the PDF stays on your device.

    Related tools

    Watermark a photoStamp words across a photo, or add a caption.Password protect PDFLock a PDF with a password before you send it.Add page numbersNumber the pages of a PDF, at the bottom or the top.Merge PDFCombine several PDF files into one, in the order you choose.PDF detailsSee the page count and hidden details, or strip them.Signature maker NewDraw or type your signature and download it as a clear PNG for documents.

    All of this, one click away

    Sureno Browser keeps a PDF editor and everyday tools built in, and works offline. Free, calm and private.

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