A Web crawler is a computer program that browses the World Wide Web in a methodical, automated manner or in an orderly fashion.

A web crawler (also known as a web spider or web robot) is a program or automated script which browses the World Wide Web in a methodical, automated manner. This process is called Web crawling or spidering. Many legitimate sites, in particular search engines, use spidering as a means of providing up-to-date data. Web crawlers are mainly used to create a copy of all the visited pages for later processing by a search engine that will index the downloaded pages to provide fast searches. Crawlers can also be used for automating maintenance tasks on a Web site, such as checking links or validating HTML code.

This process helps in creating a data the internet user is looking for and these programs are made to be used only once but they can be programmed and designed to use for long term use as well. There are a several uses of this program and the most popular use of this program is to provide web surfers with relevant websites. The other uses of this program include linguists and market researchers to try and search information on the web in a relevant and organized manner. KNTechnologies is one of the organizations which provide solutions on Web Extractor.