Add Watermark
Overlay diagonal text such as CONFIDENTIAL or DRAFT.
PDF on-device
Drop a file here
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single file
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Private by design. Add Watermark processes your PDF locally in this tab. Nothing is sent anywhere.
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About Add Watermark
Yes. Add Watermark is free with no account required. Because it runs on your device there are no server costs to pass on.
No. Your PDF files are read and processed inside this browser tab. They are never transmitted to a server.
After the page has loaded once, the tools keep working without a connection — there is no backend to reach.