Can I add my own stamp?

Create a signature or upload an image in the Sign tab; it can be placed like any stamp.

Is anything uploaded?

No, unless you choose to save or share the result.

Add stamps and dates to a PDF online

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Private by design

All processing in InstaPDF Studio is done locally, on your device. Your documents are opened, edited and saved right here in your browser and are not uploaded.

Nothing leaves your device unless you choose Save or Share link.