Draw your signature with your mouse or finger, or type your name in a handwriting style, then download it as a transparent PNG. Everything stays in your browser.
Yes, strokes are drawn on a blank canvas with no background, so the downloaded PNG overlays cleanly on documents, PDFs and emails.
In most everyday contexts (letters, internal approvals, many contracts) yes, the UK Electronic Communications Act 2000 and the eIDAS regulation recognise electronic signatures. High-stakes documents (wills, some property deeds) have stricter rules; when in doubt, check with the receiving party.
No, drawing, typing and PNG export all happen locally in your browser. Your signature never leaves your device.
Download the PNG, then use Insert → Picture in Word, or the 'Add image' tool in any PDF editor, and scale it to size.