Telegram group crawler is a free tool to fetch the list of people already joined to a Telegram group. It's safe and uses Telegram Official API to get the usernames of people. Since not everyone has a username, the generated list is always smaller than the number of people in the target group. Go to Telegram Group Crawler and type in the public ID of the group including the initial @ (e.g. @Python or @OneShare) and start crawling. Crawling usually takes from 5 to 60 seconds depanding on the group members count.