Google provides many tool for normal people, as well as website builders and managers. Google's Search console mobile friendly tool allow's you to test if your website is mobile friendly. 

While you visit search console mobile friendly tool  

When you visit, there is a bar that say's, enter URL here. Type in your webiste's URL here. Then fill the captha and then it will show you if your site is mobile friendly or not. It will also show you if your site has any loading issue.

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