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Tools/Proxy Tester

Free Proxy Tester

Test HTTP, SOCKS4 & SOCKS5 proxies in bulk. Check exit IP, latency, geolocation, ISP, and anonymity level — all server-side so your real IP stays private.

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What is a Proxy Checker?

A proxy checker (also called a proxy tester or proxy server checker) is a tool that verifies whether a proxy server is functional, measures its response speed, and reveals key details about the connection — including the exit IP address, geographic location, internet service provider (ISP), and anonymity level.

When you send traffic through a proxy, the destination website sees the proxy's IP address instead of yours. A proxy tester confirms this is actually happening and that the proxy isn't leaking your real IP address — which is what determines the anonymity level.

How to Use the Proxy Tester

1

Choose Single or Bulk mode

Use Single mode to test one proxy with detailed output. Use Bulk mode to paste a list and test them all simultaneously.

2

Enter your proxies

Supported formats: host:port, host:port:user:pass, user:pass@host:port, or prefixed with http://, socks4://, or socks5://

3

Configure settings

Set the number of threads (concurrent tests), timeout in seconds, and optionally a delay between tests for rotating proxy pools.

4

Run and filter

Click Test All and watch results populate in real time. Filter by Alive or Dead, then export working proxies as TXT or CSV.

Understanding Proxy Anonymity Levels

Elite

Also called "high anonymity" proxies. The destination server cannot tell a proxy is being used — no proxy-related headers are forwarded.

Anonymous

The server knows a proxy is in use (via headers like "Via") but your real IP address is not revealed.

Transparent

The server can see both that a proxy is in use AND your real IP via X-Forwarded-For. Provides no privacy.

Supported Proxy Formats

192.168.1.1:8080
192.168.1.1:8080:username:password
username:password@192.168.1.1:8080
http://192.168.1.1:8080
http://username:password@192.168.1.1:8080
socks4://192.168.1.1:1080
socks5://username:password@192.168.1.1:1080

Why Test Proxies Server-Side?

Browser-based proxy testers have a fundamental limitation: browsers cannot route arbitrary HTTP requests through an external proxy server via JavaScript. The only way to truly test a proxy is to make the request from a server that can be configured to use that proxy.

Our tool runs all proxy tests server-side using Node.js with CONNECT tunneling (via HTTPS targets). This ensures the proxy is actually being used for the test traffic — not bypassed. Your real IP is never part of the test request.

Your Proxy Credentials Are End-to-End Encrypted

When you enter a username and password, they are encrypted in your browser before the request leaves your device — using ECDH P-256 + AES-256-GCM, the same cryptographic primitives used in TLS. The server receives only an encrypted blob; the plaintext credentials exist only in memory during the test and are never written to any log.

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Encrypted before sending

Your browser generates a one-time keypair per request and encrypts credentials locally. Only the encrypted envelope travels over the network.

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Invisible to Cloudflare

The Cloudflare edge layer only ever sees the encrypted blob — even if request bodies were logged, credentials would be unreadable.

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Never stored or logged

The backend decrypts credentials in memory, runs the proxy test, then discards them. No database writes, no log entries, no traces.

Tips for Accurate Results

Frequently Asked Questions

What is a proxy tester?›
A proxy tester is a tool that checks whether a proxy server is working by routing a test request through it and measuring the response time, exit IP address, location, and anonymity level.
How do I test if my proxy is working?›
Enter your proxy's host and port (and optionally username/password) into the single tester and click "Test Proxy". The tool will connect through your proxy and show you the exit IP, latency, and anonymity level within seconds.
What proxy formats are supported?›
The tool supports HTTP, HTTPS, SOCKS4, and SOCKS5 proxies. In bulk mode, you can paste proxies in any of these formats: host:port, host:port:user:pass, user:pass@host:port, or with a protocol prefix like http:// or socks5://
What does anonymity level mean?›
Elite (high anonymity) proxies don't reveal that you're using a proxy at all. Anonymous proxies tell the server a proxy is in use but hide your real IP. Transparent proxies forward your real IP to the destination — offering no privacy.
Why is the proxy showing my own IP?›
This usually means the proxy is transparent or the connection failed silently. Some proxies only work with specific protocols or require authentication. Try testing with credentials and ensure the proxy supports HTTPS (CONNECT tunneling).
How many proxies can I test at once?›
There is no hard limit on the number of proxies in bulk mode. You can adjust the thread count (concurrency) from 1 to 50 to control how many are tested simultaneously. Adding a delay between requests helps if you're using rotating proxies.
Why use a delay between proxy tests?›
When testing rotating proxies (like residential or mobile pools), all concurrent requests may hit the same exit node. Adding a delay of 1–5 seconds forces the pool to rotate and assign different IPs, giving more accurate results.
Is my proxy username and password safe?›
Yes. Credentials are encrypted in your browser using ECDH P-256 + AES-256-GCM before the request leaves your device. The server decrypts them in memory only for the duration of the test — they are never logged, stored, or visible to any third party including Cloudflare.
Is this tool free?›
Yes — completely free with no sign-up required. The proxy tester runs server-side so your real IP is never exposed during testing.