I am looking for a basic information icon like this:

I am looking for a basic information icon like this:

 
    
     
    
    After some more searching, I myself have found the entity. The code for it is ⓘ, and it looks like this: β
 
    
    There's  (U+1F6C8, CIRCLED INFORMATION SOURCE). As an HTML entity: 🛈.
There are plenty of tools, many online, that let you search for, and get more information about, Unicode characters. My personal favourite is this one.
 
    
    this may help you , using html and css we can achieve this results
<!DOCTYPE html>
<html>
<style>
.tooltip {
  position: relative;
  display: inline-block;
  border-bottom: 1px dotted black;
}
.tooltip .tooltiptext {
  visibility: hidden;
  width: 120px;
  background-color: black;
  color: #fff;
  text-align: center;
  border-radius: 6px;
  padding: 5px 0;
  /* Position the tooltip */
  position: absolute;
  z-index: 1;
}
.tooltip:hover .tooltiptext {
  visibility: visible;
}
</style>
<body style="text-align:center;">
<div class="tooltip">🛈
  <span class="tooltiptext">Tooltip text</span>
</div>
</body>
</html> 
    
    UNICODE   U+02139
HEX CODE  ℹ
HTML CODE   ℹ
CSS CODE  \2139
// css example
span {
  content: "\2139";
}HTML Example
<span>ℹ</span> 
    
    These days I use emoji for "info" βΉοΈ or "documentation" or "source"
Previously, I would put the β inside superscript β because it reflects that it is a footnote to the text.
<sup>ⓘ</sup> 
Also, consider the β° symbol over the as it respects the baseline.
