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Watermark

Free online PDF tools · everything runs in your browser

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Processed locally, never uploaded

Files never uploadedEverything runs in your browser
Nothing to installWorks straight from the page
Free and unlimitedNo sign-up or login

Merge PDF

Combine several PDFs into one file, in the order shown below (drag to reorder).

    No files added yet

    Stamp a text or image watermark on every page; adjust size, colour, opacity, angle and position.

    All processing happens locally in your browser. Your files are never uploaded to any server.

    Open this tool

    Stamp a text or image watermark on every page of a PDF, with adjustable size, colour, opacity, angle and position (centre, tile, corners). Ideal for marking drafts, internal documents or asserting copyright.

    The watermark is drawn on top of each page and the original content is never altered; if it covers too much, lower the opacity or move it to a corner. Everything is processed locally with no uploads.

    How to use it

    1. Add a PDF.
    2. Choose watermark type: text or image.
    3. Enter the text or pick an image, then adjust size, colour, opacity, angle and position.
    4. Click Start and download the watermarked PDF.

    Frequently asked questions

    Will the watermark cover the content?
    It is drawn above the page and never modifies the content underneath. If it is in the way, lower the opacity or choose a corner position.
    Can I make a repeating full-page watermark?
    Yes - choose the tile position and the watermark repeats at even intervals.
    Are my files uploaded to a server?
    No. Everything runs in your browser and there is no upload endpoint, so the server never sees your content.
    How large a file can I use?
    Stay under about 100 MB and a few thousand pages. Speed and memory depend on your own device.
    Is it free? Do I need an account?
    It is completely free with no usage limit, and no sign-up or login is required.
    Does it work on phones?
    Yes, the layout is responsive. Large files and complex edits are easier on a desktop.
    Which browsers are supported?
    Any modern browser: Chrome, Edge, Firefox, Safari and their mobile versions.
    Does it work with scanned PDFs?
    Yes for page-level operations, which do not need a text layer. There is no OCR, so text cannot be pulled out of a scan.

    Client-side only · No sign-up · Local processing · Files never uploaded