HTML

table align

<!-- Center table in page -->
<table align="center">
...
</table>

<!-- Center content of table -->
<table>
  <thead style="text-align:center">
    <tr>
      <th>...</th>
    </tr>
  </thead>
  <tbody style="text-align:center">
    <tr>
      <th>...</th>
    </tr>
  </tbody>
</table>