I thought I'd jump in since I recently dealt with a similar issue. So, regarding your question about finding an online proxy checker solution, have you considered looking into ISP proxy servers? They often provide reliable options, and since they're from your Internet Service Provider, they tend to be more secure and stable. Additionally, you might want to explore some forums or communities dedicated to proxy servers. They often share
proxy list and recommendations based on user experiences, which can be super helpful in finding the right solution for your needs. Some have more features than others, like checking for anonymity levels or testing speed.