What is a Proxy Checker?
A proxy checker is a tool that tests whether a proxy server is reachable, measures how fast it responds, and returns details about the proxy — including its IP address, location, protocol type, and anonymity level.
Unlike browser-based tools, this checker makes the test request server-side — the only accurate way to verify a proxy is actually working. You get real latency numbers and genuine anonymity detection, not just a port scan.
Status
Online
Latency
243ms (Fast)
Protocol
SOCKS5
Anonymity
Elite
Location
Frankfurt, Germany
IP Address
185.220.101.x
Proxy Anonymity Levels Explained
Not all proxies offer the same level of privacy. Understanding anonymity levels helps you choose the right proxy for your use case.
Elite
High Anonymity
The destination server cannot detect that you are using a proxy. Your real IP is hidden and no proxy-identifying headers are sent. The highest level of anonymity — ideal for privacy-sensitive tasks.
Anonymous
Standard
Your real IP is hidden, but the destination server can detect that a proxy is in use via HTTP headers. Sufficient for most use cases but not suitable where proxy detection is a concern.
Transparent
No Privacy
Your real IP address is forwarded to the destination server via the X-Forwarded-For header. Offers no privacy benefit — typically used for caching or content filtering rather than anonymity.
How the Proxy Check Works
You submit a proxy address
Enter your proxy in host:port or protocol://host:port format. The request is sent to a server-side route handler — not executed in your browser.
The server routes a request through your proxy
The route handler attempts to connect to a neutral IP lookup endpoint through your proxy using the appropriate agent (HTTP or SOCKS). This is the only accurate way to verify a proxy is working.
Latency is measured
The time from request initiation to response receipt is recorded in milliseconds. This reflects real-world proxy performance under current network conditions.
IP, location and anonymity are detected
The IP address seen by the endpoint is returned along with geolocation data. Response headers are inspected to determine whether the proxy reveals your real IP or identifies itself as a proxy.
Supported Proxy Formats
host:porte.g. 192.168.1.1:8080Defaults to HTTP protocol. The simplest format — just the IP address or hostname and port number.
http://host:porte.g. http://192.168.1.1:8080Explicit HTTP proxy. Use this when you want to be specific about the protocol.
https://host:porte.g. https://192.168.1.1:8080HTTPS proxy with TLS support. Used for encrypted proxy tunnels.
socks4://host:porte.g. socks4://192.168.1.1:1080SOCKS4 proxy. Supports TCP connections but not UDP or authentication.
socks5://host:porte.g. socks5://192.168.1.1:1080SOCKS5 proxy. The most capable protocol — supports TCP, UDP, and authentication.
Frequently Asked Questions
What is a proxy checker?
A proxy checker tests whether a proxy server is reachable and working. It measures response latency, detects the anonymity level, and returns details about the proxy IP including its location and organisation. This tool does all checks server-side — the only accurate method for real proxy verification.
What is the difference between elite, anonymous, and transparent proxies?
Elite proxies hide your IP and don't reveal they are proxies — the highest level of privacy. Anonymous proxies hide your IP but send headers that identify them as proxies. Transparent proxies forward your real IP to the destination server and offer no privacy protection.
Why can't proxy checking be done in the browser?
Browsers enforce CORS security policies that prevent direct connections to arbitrary proxy servers. Real proxy verification requires the test request to be routed through the proxy from a server environment — which is what this tool does via its server-side route handler.
What proxy formats does the tool support?
The checker supports host:port (defaults to HTTP), http://host:port, https://host:port, socks4://host:port, and socks5://host:port formats. Both IP addresses and hostnames are accepted.
Why is there a rate limit of 5 checks per minute?
Each proxy check requires a server-side outbound network request. Rate limiting to 5 checks per minute per IP keeps the tool free and available for everyone without abuse from automated scripts or bulk checking.
What does the latency measurement represent?
The latency shown is the total round-trip time in milliseconds from when the server initiates the connection through your proxy to when it receives a response. Under 300ms is considered fast, 300–800ms moderate, and above 800ms slow.