Fix lag in Minecraft
Lag in Minecraft starts in one of three places: your home, your line or the route to Mojang / Microsoft's servers. Find out which before you change anything or pay for a "ping reducer".
In your home
Wi-Fi far from the router, other devices downloading, a busy PC or console, and strict NAT on the router. Test with the spike finder, then try a cable.
Find lag spikesOn your line
When someone uploads or streams, a queue builds in the router and your game waits behind it (bufferbloat). Smart Queue fixes it.
Fix bufferbloatBeyond your line
Distance to the server and your provider's route. Pick the closest region, and check the route for detours below.
Test server regionsHow Minecraft picks a server
You pick the server. For your own world, Realms runs in a fixed region; a server you host at home is only as good as your home upload.
Settings worth checking
- Java: press F3 to see ping to the server in the debug screen (or check the server list's signal bars).
- Hosting at home? Lower view distance on the server and run it over Ethernet, not Wi-Fi.
Rubber-banding on a home-hosted server is usually the host's upload filling up. Smart Queue on the host's router helps a lot.
Ping to nearby server regions
Mojang / Microsoft doesn't publish test addresses for its game servers, so this measures the cloud regions where most online games and voice chat run. It shows the lowest ping your connection can reach in each area and whether your provider takes a detour.
Ping to game and call servers
Round trips to the cloud regions where most game, voice and video servers run. Distance sets a floor on your ping that no setting at home can lower, so pick the closest region when a game lets you.
Minecraft ports
Forwarding these fixes connection problems such as strict NAT or voice chat that won't connect. It doesn't lower lag on its own. Most routers with UPnP turned on open them automatically.
| Protocol | Ports |
|---|---|
| TCP | 25565 (Java server) |
| UDP | 19132 (Bedrock server) |
As listed by Mojang / Microsoft; they can change, so check Mojang / Microsoft support if something doesn't work. Test a forward with the port checker.