w3schools center button code example
Example 1: html center button
button{
/*Change the width as much as you like, but make sure
margin-left and margin-right + width = 100%*/
width:50%;
margin-left:25%;
margin-right:25%;
}
Example 2: html center button
<center><a href="https://www.google.com"><button>Button Text</button></a></center>