Proxy Tester
Test whether a proxy actually works before you rely on it. Paste one proxy or a whole list and this tester makes a real connection through each one, reporting alive or dead status, round-trip latency, exit country, ISP, and proxy type. Supports HTTP, HTTPS, SOCKS4, and SOCKS5 in the same batch.
Live checking is discontinued
ProxyChecker.dev no longer runs proxy checks, the API, MCP tools or paid plans. Nothing on this site tests a proxy anymore. The guides below still explain how proxy testing works and what to look for.
Need working proxies? These are the two providers we tested with:
Frequently asked questions
How does this test if a proxy works?
It makes a real request routed through the proxy to a known endpoint and measures whether the connection succeeds and how long it takes. This is different from a ping, which only checks basic reachability and can't confirm the proxying itself works.
A proxy tests dead here but works in my browser, why?
Browsers can silently retry or fall back between protocols. This tester connects strictly with the protocol you specify, so a real handshake mismatch (like a SOCKS5 proxy listed as HTTP) shows up as dead here even if a browser masked it. Try prefixing with the correct protocol.
What proxy formats can I test?
ip:port, ip:port:user:pass, user:pass@ip:port, and protocol-prefixed forms like socks5://ip:port. One per line, lines starting with # are ignored.
Can I test proxies from the command line?
Yes. Run npx proxychecker-dev proxies.txt for the same checks in your terminal, with JSON and CSV output for scripting. It uses the same API as this web tool.