If our checker says a site is up but you still can't open it, work through these steps in order.
Your browser may be showing a cached copy. Press Ctrl+F5 (Windows/Linux) or Cmd+Shift+R (Mac) to reload and ignore the cache.
Stale cookies or an overloaded cache can break sites even when they're up. Clear the cache for the site you're having trouble with, or try a private/incognito window first — it's faster and uses no cache at all.
Your device remembers old DNS answers, which can point at dead servers after a site changes. Windows: ipconfig /flushdns in a command prompt. Mac: sudo dscacheutil -flushcache. Linux: sudo systemd-resolve --flush-caches (or restart your network manager).
Your ISP's DNS may be slow or blocking a site. Switch to 1.1.1.1 (Cloudflare) or 8.8.8.8 (Google) in your router or device network settings.
Disable your VPN, switch from Wi-Fi to mobile data, or use your phone as a hotspot. If the site loads on another network, the problem is your network or ISP — not the site.
Run the site through our checker. If our server reaches it but you can't, it's almost certainly local to you. If our server can't reach it either, it's a real outage affecting everyone — check the site's status page or wait a few minutes.