Sign a PDF — Draw, Type or Upload Your Signature

In most jurisdictions an image of your signature applied with clear intent is an electronic signature and is enforceable for ordinary agreements — that is what the eIDAS regulation calls a simple electronic signature and what the US ESIGN Act recognises. It is not a digital signature: there is no certificate, so it proves neither who applied it nor that the document is unaltered since. Where that matters — deeds, some property and court filings — you need a certificate-based signature from a qualified provider.

Not by dragging it off in a reader — it is drawn into the page content rather than added as an annotation, which is the difference between a signature and a sticker. Anyone with a PDF editor can still edit the page, exactly as they could with a scanned signature on paper.

The stroke thins as you move faster, the way a pen does. A constant-width line is what makes most mouse-drawn signatures look like a scribble rather than a signature.

Yes. Place it once, position it, then use "Repeat on every page" — which is what initialling a multi-page contract needs.