An easy way to put sharp Icons on your webpage is by using Google Icons.
To use the Google icons, add the following line inside the <head> section of your HTML page:
<link rel="stylesheet" href="https://fonts.googleapis.com/icon?family=Material+Icons">
No downloading or installation is required!
After this, you simply add a set of icon tags with te correct class and within it the name of the icon of your choice.:
<i class="material-icons">favorite</i>
You can try it at W3schools.com.