Free Online Proxy Checker
The proxy checker tests HTTP, HTTPS, and SOCKS5 proxies for teams cleaning lists or validating supplier inventory. It reports whether each proxy works, which country and ISP it exits through, the detected protocol, and response time, so users can remove dead endpoints before automation or monitoring jobs.
A proxy checker should be the first stop after adding a new host, port, and login. It confirms whether the endpoint responds, which IP is visible externally, and whether authentication fails before you connect it to a browser profile, scraper, or automated test. Catching that early saves time because a bad proxy setup often looks like a problem in the tool using it.
Run the result against the exact browser, device, proxy protocol, and target country you plan to use in production. A clean result here is not a ranking promise, but it catches the configuration mistakes that usually create blocked sessions, wrong geo signals, DNS leaks, or inconsistent fingerprints.
For repeat workflows, record the visible IP, ASN, DNS route, latency, and warning state before and after each proxy change. That gives QA, scraping, SEO, ads, and account teams a comparable baseline instead of relying on a single one-off check.
When troubleshooting a blocked session or unexpected platform response, work through the stack in order: confirm the port is reachable, verify the exit IP and ASN, check DNS resolver, inspect request headers, and then compare browser fingerprint and timezone. Skipping layers leads to misdiagnosis — a timeout at the port level looks similar to a cookie checkpoint at the application layer but the fix is completely different.
Mobile proxy workflows behave differently from datacenter ones because CGNAT means multiple physical users share the same outbound IP range. Platforms treat these IPs with higher inherent trust, but that trust can erode if the same session triggers unusual behavior like very high request rates, mismatched timezones, or browser fingerprints that do not match a real mobile device. Use these diagnostic tools to verify the whole configuration, not just the IP.
Test your HTTP, HTTPS, and SOCKS5 proxies instantly. Check status, response time, country, ISP, and location — free.
Why professionals trust us
No registration
Up to 20 proxies
HTTP & SOCKS5
Real-time results
Location & ISP data
Formats: host:port host:port:user:pass user:pass@host:port — max 20 proxies
Fast Checking
Check up to 20 proxies simultaneously with real-time results.
Multi-Protocol
Supports HTTP, HTTPS, and SOCKS5 proxy protocols.
100% Free
No registration required. Use it as many times as you want.
Done checking? Get proxies that actually work.
Our 4G/5G proxies on Polish LTE network pass all common checks. Dedicated IPs, 2-second rotation, cleaner carrier IPs.
How to Use the Proxy Checker
What does this tool check?
This free proxy checker tests whether your HTTP, HTTPS, or SOCKS5 proxies are alive and responding. For each proxy it measures response time in milliseconds, detects the protocol type, identifies IP geolocation (country, city, ISP), and verifies authentication credentials — so you can filter out dead proxies before running automation workflows.
Supported proxy formats
Enter one proxy per line using any of these formats: host:port for public proxies, host:port:username:password or username:password@host:port for authenticated proxies. You can check up to 20 proxies at once. The tool supports both IPv4 and domain-based proxy addresses.
Understanding response times
Response times below 1000ms (shown in green) indicate a fast, healthy proxy. Times between 1000–3000ms (yellow) are acceptable for most tasks. Times above 3000ms (red) suggest the proxy is overloaded or far away. For time-sensitive operations like sneaker bots or ad verification, aim for proxies under 500ms.
Why use mobile proxies?
Polish mobile proxies from Proxy Poland run on real LTE 4G/5G SIM cards and Android phones, so their traffic follows the same carrier patterns as regular phone users. Platforms like Google, Facebook, and Instagram treat mobile IPs differently from datacenter ranges — they rarely appear on blocklists and tend to pass stricter bot checks. That makes them a practical choice for social media management, web scraping, SEO monitoring, and ad verification.
Frequently asked questions
Bulk checks, formats, latency bands, and what dead results usually mean.
What does the bulk proxy checker test?+
It checks whether each HTTP, HTTPS, or SOCKS5 proxy is alive, measures response time, detects protocol support, verifies authentication when credentials are provided, and reports the exit IP geolocation (country, city, ISP). Use it to drop dead or slow proxies before automation, scraping, or SEO monitoring.
How many proxies can I check at once?+
Up to 20 proxies per run. Paste one proxy per line. For larger lists, run multiple batches or call the same checker logic from your own scripts.
Which proxy formats are supported?+
host:port for open proxies; host:port:username:password or username:password@host:port for authenticated proxies. IPv4 and domain-based hosts both work.
What do the response-time colors mean?+
Green under 1000ms is healthy for most work. Yellow 1000–3000ms is acceptable for bulk tasks. Red above 3000ms usually means congestion or a distant node — avoid those for real-time logins or ad verification.
Does the checker store my proxy credentials?+
No. Credentials are used only for the live probe and are not written to long-term logs. Prefer session-based handoff from the dashboard rather than putting secrets in the URL.
Can I test mobile 4G/5G proxies?+
Yes. Protocol and latency checks work the same for mobile, residential, and datacenter proxies. For Proxy Poland mobile ports, you should see a Polish carrier ASN when the proxy is healthy.
Why does a proxy show dead when it works in my code?+
Common causes: wrong protocol, bad auth, IP whitelist that excludes the checker egress, or the target endpoint used by the checker is blocked. Re-check format and try again after confirming credentials.
Is this free to use?+
Yes. The bulk proxy checker is a free public tool. No account is required to run a check.