From within CuteFTP, you can open an HTML document in your default browser.
To preview an HTML document in a browser
Open an HTML document in CuteFTP.
Click anywhere in the document, then do one of the following:
On the main menu, click Tools > View in Browser.
On the HTML editor toolbar, click View in Browser 
.
To close the preview
Do one of the following:
In the upper-right corner of the browser window, click Close 
.
On the main menu of the browser, click File > Close.