I was having a tough time figuring out why my proxies kept failing at random moments. At first, I thought it was just temporary server issues, but the problem kept coming back. That’s when I decided to check proxy server online https://proxy-checker.net/en/ and everything started to make sense. The tool showed me which proxies were dead, which ones were too slow, and which were still solid. After cleaning up the list, my connection became so much more stable.