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Guides to the internet's most common error messages
Plain-English explanations of why a site won't load — and a quick way to tell whether it's the server or your own connection.
502, 503, and 504 Errors: What Each One Actually Means
Bad Gateway, Service Unavailable, Gateway Timeout — these three errors look similar but point to different problems. Here's how to tell them apart and what to check for each.
Read guideERR_CONNECTION_TIMED_OUT: Why It Happens and How to Fix It
ERR_CONNECTION_TIMED_OUT means your browser gave up waiting for a response. Here's how to tell whether the server, your network, or something in between is responsible.
Read guide'Your Connection Is Not Private': What This SSL Warning Actually Means
The full-page red warning isn't always a sign the site is compromised. Here's what triggers it, how to check safely, and when you genuinely should not click through.
Read guideDNS_PROBE_FINISHED_NXDOMAIN: What It Means and How to Fix It
DNS_PROBE_FINISHED_NXDOMAIN means your browser couldn't resolve the domain to an IP address. Here's what causes it and the exact steps to fix it, whether it's your device or the site itself.
Read guideIs It Down for Everyone or Just Me? How to Tell the Difference
A site won't load and you don't know if it's a global outage or your own connection. Here's how to actually tell the difference in under a minute.
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