Proxy Checker: How to Test If Your Proxy Is Working

A proxy checker is a tool that tests whether your proxy server is working correctly. It verifies the proxy’s IP address, location, speed, anonymity level, and protocol support. Whether you’re managing a list of proxies for web scraping, testing a new mobile proxy service, or troubleshooting connection issues, a proxy checker helps you confirm everything is functioning as expected before you start working.

This guide covers the best online proxy checkers, what they test, how to interpret results, and how to verify your proxy setup is properly configured.

What Does a Proxy Checker Test?

A good proxy checker verifies several key aspects of your proxy connection:

Best Online Proxy Checkers

1. WhatIsMyIPAddress.com

The simplest way to check if your proxy is working. Visit the site and it instantly shows your visible IP address, location, and ISP. Compare this with your real IP (check without the proxy first) to confirm the proxy is active.

• Best for: Quick IP verification
• Shows: IP, location, ISP/ASN, hostname
• Cost: Free

2. IPinfo.io

A more detailed IP analysis tool that’s popular among developers. It provides comprehensive data including the IP type (residential, datacenter, mobile), ASN details, and whether the IP is associated with a VPN, proxy, or hosting provider.

• Best for: Identifying proxy type and IP reputation
• Shows: IP, ASN, organization, IP type classification, privacy detection (VPN/proxy/Tor flags)
• Cost: Free for basic lookups, API plans for bulk checking

3. BrowserLeaks.com

Goes beyond IP checking to analyze your entire browser fingerprint. Essential if you’re using an anti-detect browser with your proxy, as it reveals WebRTC leaks, canvas fingerprint, WebGL data, and other tracking vectors that could expose your real identity.

• Best for: Detecting IP leaks and fingerprint issues
• Shows: IP, WebRTC leak test, DNS leak test, canvas fingerprint, WebGL, fonts, and more
• Cost: Free

4. Whoer.net

Provides an overall anonymity score based on multiple factors. It checks for DNS leaks, WebRTC leaks, timezone mismatches, and language inconsistencies that could reveal you’re using a proxy.

• Best for: Overall anonymity assessment
• Shows: Anonymity percentage, IP details, DNS information, browser headers, JavaScript data
• Cost: Free

5. FOGDN Proxy Checker

A bulk proxy checker that lets you test multiple proxies at once. Paste a list of proxy addresses and it tests each one for connectivity, speed, and anonymity level. Useful when you’re evaluating a new proxy provider or cleaning a proxy list.

• Best for: Bulk proxy testing
• Shows: Status (alive/dead), speed, anonymity level, country, protocol
• Cost: Free for limited checks

How to Check Your Proxy Is Working

Follow this step-by-step process to verify your proxy setup:

Step 1: Check Your Real IP

Before connecting to your proxy, visit an IP checker site and note your real IP address. This is your baseline for comparison.

Step 2: Connect to Your Proxy

Configure your proxy in your browser (Chrome setup guide), device (iPhone / Android), or application.

Step 3: Verify IP Changed

Visit the same IP checker site. Your displayed IP should now be different from your real IP. If it’s the same, your proxy isn’t configured correctly.

Step 4: Verify Location

Check that the IP location matches what you expect. If you’re using a USA mobile proxy, the location should show a US city. If the location is wrong, you may be connected to the wrong proxy endpoint.

Step 5: Check for Leaks

Visit BrowserLeaks.com and check for:

• WebRTC leak – Your real IP may leak through WebRTC even with a proxy configured. Disable WebRTC in your browser or use an anti-detect browser.
• DNS leak – Your DNS requests might still go through your real ISP, revealing your location. Use the proxy provider’s DNS or a third-party DNS like Cloudflare (1.1.1.1).
• Timezone mismatch – If your proxy is in New York but your browser timezone shows Tokyo, this inconsistency can flag you.

Step 6: Test Speed

Run a speed test through the proxy to ensure performance is acceptable. Some latency is normal (an extra hop adds 50-200ms), but if speeds are extremely slow, the proxy server may be overloaded or geographically distant.

Checking Proxy Type: Mobile vs Residential vs Datacenter

Not all proxy IPs are equal. IPinfo.io and similar services can identify what type of IP your proxy uses:

• Mobile IP – ASN belongs to a mobile carrier (e.g., AT&T Wireless, T-Mobile). These have the highest trust scores and are hardest to detect. Learn more about how mobile proxies work.
• Residential IP – ASN belongs to a consumer ISP (e.g., Comcast, Spectrum). Good trust scores but lower than mobile.
• Datacenter IP – ASN belongs to a hosting provider (e.g., AWS, DigitalOcean). Easily identified and frequently blocked.
• ISP/Hosting hybrid – Hosted in a datacenter but registered under an ISP ASN. Passes some checks but sophisticated systems can still detect them.

If your proxy provider claims to offer mobile proxies but the IP checker shows a datacenter ASN, you’re not getting what you paid for.

Proxy Anonymity Levels

Proxy checkers classify proxies into three anonymity levels based on what HTTP headers they forward:

Transparent Proxy

Forwards your real IP in the X-Forwarded-For header. The target website knows your real IP and knows you’re using a proxy. These offer zero anonymity and are typically used for caching or content filtering.

Anonymous Proxy

Hides your real IP but identifies itself as a proxy through headers like Via or X-Proxy-ID. The website knows you’re using a proxy but can’t see your real IP.

Elite (High Anonymity) Proxy

Hides your real IP and doesn’t identify itself as a proxy. No revealing headers are sent. The website sees a normal connection from the proxy’s IP. Mobile proxies are typically elite proxies because the traffic genuinely originates from a mobile device on a carrier network.

Command-Line Proxy Checking

For developers and power users, you can check proxies from the command line:

Using cURL

# Check your IP through a proxy
curl -x http://user:pass@proxy-host:port https://api.ipify.org?format=json

# Check with SOCKS5 proxy
curl --socks5 user:pass@proxy-host:port https://api.ipify.org?format=json

# Get detailed IP info
curl -x http://user:pass@proxy-host:port https://ipinfo.io/json

Using Python

import requests

proxy = {
    "http": "http://user:pass@proxy-host:port",
    "https": "http://user:pass@proxy-host:port"
}

# Basic IP check
response = requests.get("https://api.ipify.org?format=json", proxies=proxy)
print(f"Proxy IP: {response.json()['ip']}")

# Detailed IP info
response = requests.get("https://ipinfo.io/json", proxies=proxy)
info = response.json()
print(f"IP: {info['ip']}")
print(f"Location: {info.get('city')}, {info.get('region')}, {info.get('country')}")
print(f"ISP: {info.get('org')}")

Bulk Proxy Checking

If you’re working with large proxy lists (common in web scraping setups), you’ll need to check many proxies quickly. Here are your options:

• Online bulk checkers – Paste your proxy list into a web-based tool. Good for occasional use with small lists (under 100 proxies).
• Desktop tools – Applications like ProxyChecker or Proxy Switcher can test thousands of proxies and save results. They test for speed, anonymity, and protocol support.
• Custom scripts – Write a Python or Node.js script that tests each proxy against an IP API endpoint. Use async/concurrent requests for speed. This gives you full control over what you test.
• Backconnect proxy dashboard – If you’re using a backconnect proxy service, most providers include a dashboard showing pool health, available IPs, and connection statistics.

Common Proxy Issues Found by Checkers

Frequently Asked Questions

How often should I check my proxy?

Check whenever you first set up a proxy, when you notice connection issues, or before starting an important task. For automated scraping operations, build proxy health checks into your scripts to automatically detect and rotate away from dead or slow proxies.

Can a website detect I’m using a proxy even if the checker says it’s elite?

Yes. Advanced detection goes beyond HTTP headers. Websites can check IP reputation databases, analyze behavioral patterns, use browser fingerprinting, and detect timezone/language mismatches. An “elite” rating from a proxy checker only means no proxy-identifying headers are sent—it doesn’t guarantee complete undetectability.

Are proxy checker websites safe to use?

Reputable ones like BrowserLeaks, IPinfo, and Whoer are safe. Be cautious with lesser-known proxy checkers that ask you to paste proxy credentials—they could harvest your login details. When in doubt, use command-line tools (cURL) or API services to check your proxy directly.

Conclusion

A proxy checker is an essential tool for verifying your proxy setup works correctly. At minimum, always confirm your IP has changed and check for WebRTC and DNS leaks. For professional use, verify the IP type (mobile, residential, datacenter) matches what your provider promises, and test speeds to ensure acceptable performance.

Mobile proxies consistently perform best on proxy checkers—they show as genuine mobile carrier IPs, pass elite anonymity tests, and are rarely found on blacklists. If you’re seeing issues with your current proxy setup, consider switching to mobile proxies for the most reliable, detection-resistant connection available.