If you want to get a realistic preview of your popup on your website without visitors actually seeing your popup, you can use this trick.
Internally we use it mostly to test our popups on different mobile devices.
Open the popup you want to preview in the editor.
In the left menu, click "Display".
Open the page targeting settings.
Target your popup to display on a fictional page of your website such as https://mywebsite.com/wisepops-test or https://mywebsite.com?test. That way, you'll be the only one to have access to this page.
Open this page on your browser.
We recommend you use a testing platform such as BrowserStack to test your popup on different kinds of devices.