How to Validate the XPATH is correct in Selenium automation

How to validate XPath?
In console type $x(“paste xpath here”) and enter. Result should show the correct element pointing to the xpath.For css, try with $(“paste css here”)
Customized XPath
From html code, we can create XPath and validate.
Css can created using below formula from html code.
Mouse interactions- Actions Class
create an object and use moveToElement and build().perform() method