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.

Herramienta gratuita de prueba de proxies

Verificador de proxies gratuito

Prueba HTTP, HTTPS, SOCKS4 y SOCKS5 de forma instantánea. Verifica velocidad, puntuación de salud, IP de salida, ISP y ubicación.

100 % gratis

Puntuación de salud

IP de salida e ISP

Tiempo real

Cómo probar proxies

Cargar proxies

Pega tu lista

Seleccionar protocolo

HTTP/SOCKS4/5

Ejecutar prueba

Resultados en tiempo real

Exportar

TXT/CSV/JSON

Listo para Probar

Carga proxies para verificar velocidad, puntuación de salud, IP de salida, ISP y ubicación

¿Por Qué Usar Nuestro Verificador de Proxies?

Todos los Protocolos

HTTP/HTTPS/SOCKS4/5

Puntuación de Salud

Calificación de calidad 0-100

IP de Salida

Ve la IP real del proxy

Detección de ISP

Identifica el proveedor

Geolocalización

País y ciudad

Tiempo Real

Resultados secuenciales

Exportar

TXT/CSV/JSON

100 % Gratis

Sin registro

¿Quién utiliza verificadores de proxies?

Web Scraping

Verifica proxies antes de campañas de scraping

Monitoreo de precios

Prueba geo-targeting para precios precisos

Verificación de anuncios

Comprueba ubicaciones de proxies para pruebas de anuncios

Redes sociales

Prueba confiabilidad para gestión de cuentas

Monitoreo SEO

Verifica ubicaciones para seguimiento de rankings

Sneaker Bots

Prueba latencia para checkouts rápidos

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