Free proxies are scraped in bulk from the web and, in theory, you can grab a large list of free proxies and put them on your host machine to ensure you don't get hung up by search engines. But in practice, most of these proxies don't work. Here's why:
1. Free IP is overused.
Because it's free, a lot of people will use it. If there are 15 people on an proxy and they are all scraping, then you will not be able to get through the search engine and your scraping will fail.
2. Low security of free proxy
The use of free proxy information security can not be guaranteed, your browsing habits, information data is easy to be obtained by a third party.
If there is too much doubt about the use of paid proxies, it is suggested to try it out first. Roxlabs provides a free trial of 500MB, including global residential IP, with unlimited extraction.