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Free network diagnostic

Website Block Checker

Paste any website link and run three live connection tests from your own network — no VPN, no signup. Find out in seconds whether the site is blocked on your connection or just down.

1. Paste a website link

Checks start automatically as you type. Only your browser contacts the site — nothing is logged or stored.

  • DNS lookupWaiting for a URL…
  • HTTPS connectionWaiting for a URL…
  • Resource probeWaiting for a URL…

2. Read the verdict

The verdict combines all three tests. Green means the site answered normally on your network; red means the connection never completed. The notes under each test explain exactly what was observed.

How to Use This Website Block Checker

  1. Paste the link of the site you want to test — a full URL or just a domain like example.com both work. The tool cleans up the input and starts testing automatically.
  2. Watch the three tests. The DNS test asks encrypted public resolvers whether the domain exists on your network path. The HTTPS test opens the same kind of connection your browser would and times it precisely. The resource probe fetches a tiny file as a second opinion.
  3. Read the verdict. If every test passes, the site is reachable on your network right now. If DNS fails, the domain is being blocked at the name level or does not exist. If DNS passes but the connection is refused or reset, something between you and the server — a firewall, an ISP filter, or SNI blocking — is cutting it off.
  4. Act on the result. A blocked verdict means the restriction lives in your network path, not in this tool. Changing networks, asking your ISP, or using a VPN are the real remedies — this checker only gives you a trustworthy diagnosis.

About This Website Block Checker

What the tool is

This website block checker answers one question with evidence instead of guesswork: is this site actually blocked on my network, or is it simply down? Paste any link and it runs three genuine network tests directly from your browser — an encrypted DNS lookup, a timed HTTPS connection attempt, and a secondary resource probe — then combines the outcomes into a plain-language verdict. Everything executes locally on your device; the only network traffic is the lookup and connection to the site you entered, exactly as if you had visited it yourself. Nothing you type is stored, logged, or sent to any server of ours, and results refresh live as you edit the URL.

How blocking actually works

When a provider or authority blocks a website, it usually does it at one of three layers. DNS blocking poisons or withholds the domain’s address, so your browser never learns where the site lives — the DNS test catches this. SNI or IP blocking lets the name resolve but kills the encrypted connection itself, often with an instant reset — the HTTPS test catches the refusal and its suspicious speed. Block pages are the sneaky third kind: the connection succeeds, but you receive a warning page instead of the site. No client-side probe can reliably tell a block page from the real site, so treat a green verdict with a visible warning page as blocked and trust your eyes.

Why it matters

Guessing wastes time. People retry dead links for days, blame their browser, or reinstall apps when the truth is a network-level block they cannot fix from their device. A thirty-second diagnosis separates “the site is gone” from “my network is stopping me”, which points you at the right fix immediately: wait out an outage, switch networks, contact your ISP, or use a VPN. For students, researchers, and remote workers on restricted networks, knowing precisely which layer is failing turns a vague “site won’t load” into an actionable answer.

Frequently Asked Questions

  • Can this tool unblock a website?

    No. This is a detection tool, not a bypass. It tells you whether a website is reachable from your current network by running the same connection your browser would make. Getting around a block needs a different network path, such as a VPN.

  • How does it detect a block without using a VPN?

    It runs three live tests from your own browser: a DNS lookup through encrypted DNS to see if the domain resolves, an HTTPS connection attempt with precise timing, and a secondary resource probe. The pattern of passes and failures reveals DNS-level blocks, connection resets, and timeouts.

  • It says reachable but I see a warning page. Why?

    Some providers block sites by serving a warning page with a normal success response instead of cutting the connection. From the network’s point of view the connection succeeded, so the probe reports reachable. If you see a block notice in your browser, trust your eyes over the test.

  • Is the link I type sent anywhere?

    No. Everything runs locally in your browser. The only network requests are the standard DNS lookup and the HTTPS connection attempt to the site you entered, plus an encrypted DNS query to a public resolver. Nothing is logged or stored.

Learn more about internet censorship on Wikipedia.