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.

Outil de test de proxies gratuit

Vérificateur de proxies en ligne gratuit

Testez instantanément les proxies HTTP, HTTPS, SOCKS4 et SOCKS5. Vérifiez la vitesse, le score de santé, l'IP de sortie, l'ISP et la localisation.

100 % gratuit

Score de santé

IP de sortie et ISP

Temps réel

Comment tester des proxies

Charger les proxies

Collez votre liste

Sélectionner le protocole

HTTP/SOCKS4/5

Exécuter le test

Résultats en temps réel

Exporter

TXT/CSV/JSON

Prêt à tester

Chargez des proxies pour vérifier la vitesse, le score de santé, l'IP de sortie, l'ISP et la localisation

Pourquoi utiliser notre vérificateur de proxies ?

Tous les protocoles

HTTP/HTTPS/SOCKS4/5

Score de santé

Notation de qualité 0-100

IP de sortie

Voir l'IP réelle du proxy

Détection FAI

Identifier le fournisseur

Géolocalisation

Pays et ville

Temps réel

Résultats séquentiels

Exporter

TXT/CSV/JSON

100 % Gratuit

Aucune inscription requise

Qui utilise les vérificateurs de proxies ?

Web scraping

Vérifier les proxies avant les campagnes de scraping

Suivi des prix

Tester le ciblage géographique pour une tarification précise

Vérification des annonces

Vérifier les localisations des proxies pour les tests d'annonces

Réseaux sociaux

Tester la fiabilité pour la gestion de comptes

Suivi SEO

Vérifier les localisations pour le suivi de classement

Sneaker bots

Tester la latence pour des achats rapides

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