Add Watermark to PDF Online

Add a text watermark to PDF pages in the browser with opacity, placement, page ranges and local saving.

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Files are not sent to a server. Processing runs in your browser, and the queue handles one file at a time so the device stays responsive.
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How to use it

Add a PDF and the pages appear as thumbnails with the watermark preview. Edit text, size, opacity and pages, then create the new PDF locally.

Recommended settings

For drafts, a diagonal center watermark at 20-30% opacity is usually readable without hiding the document. For subtle labels, use bottom right and a smaller size.

Privacy

Your files are not uploaded to a server. The editor runs in your browser with local libraries from this site.

Limits

Large images can take longer on phones. If the browser slows down, process fewer files at once or choose a smaller output format.