What this tool actually fetches
This pulls a live list of free, publicly listed proxy servers in your chosen protocol - HTTP, SOCKS4, or SOCKS5 - at the moment you click "Fetch proxy list." It is not a static, pre-written list; every request goes out and gets whatever is currently published.
What "free public proxy" really means
These are servers volunteered or exposed to the public internet by parties you cannot identify or vet. Nobody is guaranteeing their uptime, speed, or - critically - what happens to the traffic that passes through them. A free proxy operator can technically see and log any unencrypted data you send through their server.
What it's reasonably good for
Low-stakes, disposable tasks: checking how a page renders from a different country's IP, basic scraping of public, non-sensitive data, or testing how your own site behaves behind a proxy. Treat every entry as temporary - proxies in this list go offline constantly as they get overloaded, blacklisted, or simply shut down by whoever was running them.
What it is never appropriate for
Never log into an account, enter a password, or submit payment details through a free public proxy. Because you don't control or know who runs the server, there's no way to verify it isn't logging that traffic. If you need a trustworthy proxy or VPN for sensitive activity, that requires a paid, reputable provider you can hold accountable - not a crowdsourced free list.