Fix Center

Each guide matches a problem the Lag Check can find. Run the check to see which ones matter for you.

Fix lag under load (bufferbloat)
Why games stutter and calls freeze when someone else is downloading — and the router setting that fixes it.
Fix unstable Wi-Fi
High jitter, packet loss and slow speeds usually come from the Wi-Fi hop, not your ISP.
Fix lag in online games
What actually causes lag spikes, rubber-banding and high ping in games, in the order to check it.
Stop background downloads causing lag spikes
Updates, game downloads and cloud backups fill your line in the background. Where each one's limit lives.
Switch to a faster DNS resolver
Every new website starts with a DNS lookup. Pick the resolver that is fastest from where you are.
Reset your network settings
Copy-paste commands to flush DNS and renew your IP on Windows, macOS and Linux, with every line explained.
Stop WebRTC leaking your real IP
If your VPN is on but WebRTC exposes a different public IP, websites can see where you really are.