Well, you can use the Chrome extension right from your Chrome browser to extract data from websites. To start with, you install it first. Then you go to the website from where you want to extract the data. Then you activate the extension and select the different data elements that interest you. The extension will work on it and get the data from the website. You can save it in a format of your choice like CSV or Excel file or even a database. The time taken may differ according to the extension that you use. But this is how it works.
