html meta refresh
snippet in html

meta refresh

user1410

<meta http-equiv="refresh" content="30">

html meta refresh

user508

<meta http-equiv="refresh" content="3; URL=http://www.example.com/">

reload tab using meta

user2891

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

auto refresh html

user5183

<!--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. -->