Free Proxy & Network Tools
Test proxy servers, check your IP address, and verify IPv6 compatibility. All tools are free, require no signup, and run directly in your browser.
No Registration Required
Runs in Your Browser
Always Free
ColdProxy's free tools help you answer three different questions quickly: does this proxy work, what IP does the internet see, and does this domain support IPv6? Use the proxy checker for proxy lists, the IP checker for your current connection, and the IPv6 checker for domain readiness.
Online Proxy Checker
Test proxy reachability, exit IP, and geographic location. Run IPv4 and IPv6 checks for proxy lists before production.
Try it freeIP Address Checker
See your current public IP address, ISP, and approximate location. Useful for verifying that your proxy or VPN connection is active and routing correctly.
Try it freeIPv6 Compatibility Checker
Test whether any domain supports IPv6 by querying its DNS AAAA records. Check IPv6 readiness before deploying IPv6 proxies on a target site.
Try it freeWhich ColdProxy tool should you use?
Use this quick comparison when you are not sure whether you need a proxy checker, a public IP checker, or an AAAA lookup.
| Tool | Best for | What you enter | What you get |
|---|---|---|---|
| Proxy Checker | Bulk checking IPv4 and IPv6 reachability, exit IP, and location before production. | One or more proxies in IP:PORT or IP:PORT:USER:PASS format | IPv4 and IPv6 reachability, exit IP, country, region, city, and failure reason |
| My IP Checker | Checking your public IPv4 and IPv6 address, ISP, ASN, and location in one click. | No input required | Live public IPv4 and IPv6, ISP, ASN, city, country, timezone, coordinates, browser, and operating system |
| IPv6 Checker | Checking whether a domain, its mail servers, and its nameservers are IPv6-ready. | A domain name or full URL | A, AAAA, MX, and NS lookup results plus every IPv6 address found |
Why use proxy tools?
Proxy tools help you verify that your setup works correctly before running production workflows. Testing early saves time and prevents failed requests, blocked connections, and inaccurate data collection.
Verify proxy masking
Confirm that a proxy changes the visible IP address and exits from the expected location before you put it into a scraper, bot, or QA workflow.
Check geo-targeting
Verify that your connection exits from the correct country and city when a workflow depends on region-specific pricing, ads, or localized content.
Catch issues before deploy
Spot dead proxies, wrong protocols, and missing AAAA records before they break a live job, a monitoring run, or an IPv6 rollout.
What each tool does
Proxy Checker
Paste a list of proxies and test them all at once. The checker sends a request through each proxy, reports whether it reaches IPv4, IPv6, or both, and shows the exit IP with its geographic location.
Open Proxy CheckerIP Address Checker
Instantly see your current public IP address along with your ISP, city, country, timezone, and address family. Use it to verify that your proxy or VPN is active and routing through the correct location.
Check Your IPIPv6 Compatibility Checker
Enter any domain to check if it supports IPv6 connections. The tool checks A, AAAA, MX, and NS records and displays every IPv6 address it finds, which helps you plan IPv6 proxy deployments with confidence. Once a target supports IPv6, deploy with USA Residential IPv6 or Datacenter IPv6 proxies.
Check IPv6 SupportNeed reliable proxies?
ColdProxy offers premium residential and datacenter proxies with high-speed connections, flexible billing, and geo-targeting across 195+ countries. Choose from unmetered, GB-based, or IPv6 plans.
Frequently asked questions
Start with the IP address checker to see what websites currently see when you connect. Then use the proxy checker to validate any proxy lists before you run them in production. If you plan to deploy IPv6 proxies, use the IPv6 compatibility checker on your target domain first to confirm it supports IPv6 connections.
No. All three tools are open to anyone. There is no signup, no login, no credit card, and no email capture. Open the tool, run your test, close the tab.
Yes. Each tool has its own permanent URL. The proxy checker also accepts a proxy via the ?proxy= query parameter, which is useful for sharing a pre-filled test link with a teammate. Results themselves are not saved on our servers, so shared links re-run the check.
Yes. All three tools are fully responsive and run in any modern mobile browser, including Chrome for Android and Safari on iOS. The same features available on desktop work on mobile with no reduced functionality.
No. The tools are diagnostics that run against proxies and domains you provide. They do not give you access to ColdProxy's proxy pool. To test ColdProxy proxies on your own targets, use the shortest paid billing period available for the plan you need — see the pricing page for details.
Yes. The IP checker auto-detects and displays either address family. The proxy checker works with IPv4 and IPv6 proxy endpoints and reports reachability, exit IP, and location. The IPv6 compatibility checker is purpose-built for IPv6 and returns every AAAA record it finds.
Yes. You can run the tools as part of any commercial workflow, include screenshots of results in client deliverables, or reference the tool URL in documentation. We only ask that you do not scrape or resell the tool output as a competing service.