What is an online proxy checker and how does it work?

An online proxy checker (proxy tester) is a free web tool that verifies if your proxy servers work correctly. It tests connectivity by sending requests through your proxy to a target website, measures response time (latency), identifies the proxy's exit IP address, shows geolocation data, and calculates a health score. Our free proxy checker tests HTTP, HTTPS, SOCKS4, and SOCKS5 proxies in real-time with sequential testing.

How do I test if my proxy is working?

To test if your proxy is working: 1) Click 'Load Proxies' and paste your proxy list, 2) Select the protocol type (HTTP, HTTPS, SOCKS4, or SOCKS5), 3) Choose a target website, 4) Click 'Run Test'. Watch as each proxy is tested sequentially with real-time results showing status, response time, exit IP address, location, and health score.

What is proxy health score and how is it calculated?

Proxy health score is a 0-100 rating indicating overall proxy quality. It's calculated based on response time (lower is better), connection success, and reliability. Scores 80-100 are excellent (green), 60-79 are good (blue), 40-59 are fair (yellow), and below 40 are poor (red). Higher health scores mean more reliable proxies.

What proxy formats does FlashProxy checker support?

Our proxy checker supports all standard formats: IP:PORT, USER:PASS@IP:PORT, IP:PORT:USER:PASS, and protocol prefixes like http://, https://, socks4://, socks5://. Select your protocol type in the toolbar for accurate testing.

Is this proxy checker completely free?

Yes! FlashProxy's online proxy checker is 100% free with no registration required. Test unlimited proxies, see health scores, view exit IPs, export results in TXT/CSV/JSON formats, and access all features at no cost. No daily limits.

How many proxies can I test at once?

Our bulk proxy checker supports testing up to 500 proxies with configurable concurrent connections (1-50). Watch real-time sequential results as each proxy is tested. Export working proxies separately for easy list management.

What is the exit IP address shown in results?

The exit IP is the IP address that websites see when you use the proxy - it's different from your real IP. This confirms the proxy is masking your identity and shows where your traffic appears to originate from. Compare exit IPs to verify proxy rotation is working.

What's the difference between HTTP and SOCKS5 proxies?

HTTP proxies work at the application layer for web traffic (HTTP/HTTPS) - ideal for browsing and web scraping. SOCKS5 proxies work at a lower network layer and support any traffic type including FTP, email, and P2P. SOCKS5 also adds authentication and UDP support. Select the correct protocol when testing for accurate results.

Why is my proxy showing as failed?

Common reasons for proxy failures: proxy server is offline or overloaded, incorrect credentials, wrong port number, proxy banned by target website, network timeout, or wrong protocol selected. Check your protocol setting matches your proxy type.

Can I test residential, datacenter, and mobile proxies?

Yes! Our proxy checker works with all proxy types: residential proxies (real home IPs), datacenter proxies (server IPs), ISP proxies (static residential), and mobile proxies (4G/5G). The geolocation and ISP data helps identify proxy type.

Free Proxy Testing Tool

Free Online Proxy Checker

Test HTTP, HTTPS, SOCKS4 & SOCKS5 proxies instantly. Check speed, health score, exit IP, ISP, and location.

100% Free

Health Score

Exit IP & ISP

Real-time

How to Test Proxies

1

Load Proxies

Paste your list

2

Select Protocol

HTTP/SOCKS4/5

3

Run Test

Real-time results

4

Export

TXT/CSV/JSON

Ready to Test

Load proxies to check speed, health score, exit IP, ISP, and location

Why Use Our Proxy Checker?

All Protocols

HTTP/HTTPS/SOCKS4/5

Health Score

0-100 quality rating

Exit IP

See proxy's real IP

ISP Detection

Identify provider

Geolocation

Country & city

Real-time

Sequential results

Export

TXT/CSV/JSON

100% Free

No registration

Who Uses Proxy Checkers?

Web Scraping

Verify proxies before scraping campaigns

Price Monitoring

Test geo-targeting for accurate pricing

Ad Verification

Check proxy locations for ad testing

Social Media

Test reliability for account management

SEO Monitoring

Verify locations for rank tracking

Sneaker Bots

Test latency for fast checkouts

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