If I were to web crawl supermarkets' websites and retrieve info and create a comparison tool for sale would that be illegal?


In the UK the Computer Misuse Act from 1990 (section 1) states that it is an offence to access a computer where:

  • the access to the data is unauthorised
  • the offender knows that it is unauthorised

This may extend to web scraping because, in some circumstances, you are accessing the website intending to use the data in a way that is not authorised by the website owner.

Thus, the conservative and recommended way is to ask the owner for permission.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.