First of all open the app Settings.
Then scroll down till you find the icon Safari.
Again scroll down till you find Advanced (click on the image to view it fully).
At last just click "Remove All Website Data". All website data will be removed❕
You can also select what data to remove. To select what data to remove you can swipe you finger from the left to the right on a URL.
All the website data has been deleted .
*Notice it could make your browsing slower. This happens because the saved information from the websites has to be loaded once more.
The creator of this guide has not included tools