Access the WP Site Checker plugin from your WordPress website’s dashboard,
Expand the “Site Checker” tab on the left-hand side,
Navigate to “UI Checks” and open the “Responsive Website Tester”,
Select the desktop, tablet, and mobile screen sizes you want to test,
Use “Custom Size” if you want to test your website at a specific screen dimension,
Add up to five different screen sizes for comparison,
View your live website across the selected screens side-by-side,
Scroll through the previews simultaneously to compare the same sections of your website,
Review the different screen sizes for responsive layout inconsistencies or other UI anomalies.
