https://cdn.jsdelivr.net/joypixels/...joypixels/assets/6.6/png/unicode/64/1f525.png Fastest and the best free proxy checker you can find. The proxy checker was focused on maximum usability, functionality and UX/UI design. We keep it in open source, and you can be sure what you use full clear software. Be careful if you downloaded it on another resource.
Features

• Themes:
  • Light
  • Dark Neon
• Support protocols: http, https, socks4, socks5
• Support Proxy Schemes:
  • user@pass:domain:port
  • user@pass:ip:port
  • domain:port:user:pass
  • ip:port:user:pass
  • ip:port
• Data capturing:
  • All data
  • Server data
• Retries
• Multiple judges support:
  • Response validation
  • Swap
• Blacklists support:
  • Single ips
  • Ips with mask
• Country checking: city, name
• Keep-Alive checking
• Anonymity detection: transparent, anonymous, elite
• Sort by: ip, port, protocols, anon, country, blacklists, keep-alive, server, timeout
• Filter by: port, protocols, anon, country, blacklists, keep-alive, server, timeout
• Search by: ip, port, server
  • Country: city, name
• Export formats:
  • ip : port
  • auth @ ip/domain : port
  • ip/domain : port : auth
  • protocol :// ip : port
  • protocol :// auth @ ip/domain : port
  • protocol :// ip/domain : port : auth
• Auto updates support

Core
Threads:

• Min 1
• Max
  • If selected 1 protocol, available 1850 threads.
  • If selected 2 protocols, available 1000 threads.
  • If selected 3 protocols, available 650 threads.
  • If selected 4 protocols, available 500 threads.

Timeout:

• Min 1000 ms
• Max 60000 ms

Data capturing:

• Capture Full Data - Capture and save all response data ( judge, body, timings, headers ) for looking at the results page (click by proxy to show all data).
• Capture Server - Parses response body at server signatures:
  • Squid
  • Mikrotik
  • Tinyproxy
  • Litespeed
  • Varnish
  • Haproxy

Options:
Retries - Will retry to check the proxy multiple times, for each protocol separately. Keep in mind, it increases proxy checking time.
Max retries: 10
Judges
If judge URL starts with "https://" will be used for HTTPS requests, with "http://" for HTTP.
SOCKS4 and SOCKS5 will use all proxy judges.
Validate Field:
If not empty - Enable response validation by text which you type. Response will be valid is this string was found in response body. Also support Regexes (Regex builds through Javascript RegExp).
Options:
Swap - Enable swap the judge url after each request, to minimize servers busy. Will split requests across all active proxy judges. If disabled - will use only one proxy judge with minimum response timeout.
Add new:
Url - Must be an unique.
Ip
Ip address lookup:
Url - External server, which return your ip in a raw data. Uses for detect proxy anonymity.
Your ip address will be cached before start the first check. If you are changed ip address, press the check button for re-lookup and re-cache your new ip.
Blacklist
If you really no need filtering through blacklist, don't enable this feature . This feature overload CPU, and need more time for prepare results.
Options:
Filtering - Enable filter through blacklists.
Add new:

• Title - Must be an unique
• Url or Path - Must be an unique

Ip addresses can be as single (127.0.0.1) or with mask (127.0.0.0/24).
Blacklists loads every time before start the check, without a progress overlay!
Results
Ports:

• Allow - Allow only input ports
• Disallow - Exclude input ports

TIPS:

• Export in protocol :// ip : port , always return proxies with protocols priority: socks5 -> socks4 -> http
• Example:127.0.0.1:1337 is socks4, socks5 proxy.Will saved as:socks5://127.0.0.1:1337
• Double click - select or deselect all countries
• Search - may contain multi words, separated by space

Updates
Checking for updates:
For installed application update will be downloaded automatically and installed.
If you use portable application, you can download the update manually (will download through your browser).
IP Location database
This product includes GeoLite2 data created by MaxMind, available https://dev.maxmind.com/geoip/geoip2/geolite2/.