Choosing a signature style starts with how you already write by hand. The signature generator on this site turns a typed name into a signature-style image in a script face; it does not draw from a mouse or read an uploaded picture. Use it to try faces, slant and weight, then take the shape you like back to paper.
Start on paper
Write your full name at normal speed, ten times, without trying to make it pretty. Circle the two versions that came out most alike; that likeness is your natural hand, and a signature that ignores it will never be repeatable. Simplify until one attempt takes about three seconds. Test it with a pen, then with a finger or a stylus on a phone, and keep the same shape for both.
Try faces in the generator
Type your name in the signature generator. It shows the name in the signature faces on this site, Allura, Alex Brush, Mr De Haviland and Mrs Saint Delafield among them, with sliders for slant and weight. A signature is judged on its first letter, so look at the capital of your first name and of your surname before anything else: a capital with a large flourish becomes the flourish of the whole signature, and a plain one leaves room for your own. A right slant of 8 to 12 degrees reads as fast and confident; upright reads as careful; heavier weight reads as formal.
What the image is for
The transparent PNG at 300 DPI drops into a letterhead, an invoice, an email footer or a website without a white box behind it; the SVG scales to a stamp or a banner. It is a picture of your name, a design asset. It is not a legal signature: it does not verify who you are, and pasting it into a document does not sign the document. For anything binding, use the process the other party provides for electronic signatures, and sign paper by hand.
From image to hand
Print the practice sheet the generator offers, trace your name for a week, then stop tracing and write it fast. Real signatures are quicker and looser than any font, which is what makes them hard to copy. Drop letters, keep the rhythm, and stop changing it once it is repeatable.