auto refresh html
snippet in html

reload tab using meta

user4832

 <meta http-equiv="refresh" content="5">

auto refresh html

user7208

<!--Place inside <head> -->
<meta http-equiv="refresh" content="30">
<!-- The http-equiv attribute provides an HTTP header for the information/value 
     of the content attribute. The http-equiv attribute can be used to simulate 
     an HTTP response header
     The content attribute gives the value associated with the 
     http-equiv or name attribute. -->