Shared prototype is not displayed 1: 1

Kenneth is correct – if your browser’s viewport is the same size or larger than the dimensions of your XD artboard your design will display at 100%, but there is also one additional factor to consider – the Viewport Height setting. If your XD design is larger than your browser’s viewport in either the height or width the prototype will scale down. You can compensate for tall designs by setting Scrolling to Vertical and setting a smaller Viewport Height.

It would be nice if there was a setting for prototypes where you could force 1:1 regardless of the viewport size. That would potentially display horizontal and/or vertical scrollbars in the browser, but that could be preferable in some cases.

So, the prototype will scale depending on three factors:

1. width of the browser
2. height of the browser
3. Viewport Height setting in XD

In your case, your prototype is 1920x1080. When I view your prototype on a monitor that is larger than your design, I see it at 1920x1080, when I view it on my laptop – which is 1680x1050 – the design is reduced to fit.

I mean the original size, it's decile 1: 1. I have tried desmaecando and marking the option for full size; but the problem is the same. Being full screen the design is scaled to the size of the window.

Link to share Adobe XD: https://xd.adobe.com/view/e04df005-e708-482a-684b-706785c07b8f-967c/

I invite you to change the size of the window. You will notice that the design is adjusted and not shown at 100% (actual size)

Link example 100% (1:11) - (No share Adobe XD): http://bit.ly/2GyMWiQ

In this example, the design always looks real (1: 1); despite the size of the window

Do you mean their original size or proportional size? Befor sharing try to uncheck  "Open in full screen" mode