How do I install LagPeek BETA?

Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. Download the .jar. Put it in the .minecraft/mods folder and launch that loader profile. Opens on Modrinth — not every file is mirrored on our own servers.

What Minecraft version does LagPeek BETA work with?

The listing gives Minecraft 26.1, 26.1.1, 26.1.2, among others. This is the version stated by the author or source site, not something we verified ourselves.

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LagPeek BETA

Java mod listed for Minecraft 26.x. Downloads from the MC Java Mods app on Android.

by BKHorn · on Modrinth

Which build do you need?

This mod ships a separate file for every mod loader and every version of the game. Pick both, then download — the wrong build installs fine and then does nothing in the game.

Mod loader

Mod loader Paper2 builds
Mod loader Purpur2 builds

Minecraft version

Minecraft 26.1–26.2Newest
Minecraft 1.21.1–1.21.11

Minecraft 26.1–26.2Newest
Minecraft 1.21.1–1.21.11

⬇ Download for 26.1–26.2 · Paper ⬇ Download for 1.21.1–1.21.11 · Paper ⬇ Download for 26.1–26.2 · Purpur ⬇ Download for 1.21.1–1.21.11 · Purpur

I don't know my version or loader

Open the Minecraft launcher and look at the profile you play on — it names both, like fabric-loader-1.21.4. The version also shows in the bottom-right corner of the game's main menu.

No loader in the profile name? Then it's plain Minecraft, and these mods won't run — you need Fabric or NeoForge installed first.

Open in MC Java Mods Get it on Google Play →

LagPeek

One command that tells you why your server is lagging.

LagPeek is a tiny, read-only diagnostic tool for Paper servers. Run one command, get an instant snapshot — no setup, no config, no background tasks.

What it shows

Run /lagpeek and you get:

TPS — 1 / 5 / 15 minute averages, color-coded (green = fine, yellow = struggling, red = lagging)
Memory — heap used / allocated / max, in MiB
Chunks — how many chunks are loaded, per world
Entity hotspots — the top entity types on your server, plus the 10 worst single chunks (entity type, count, and coordinates so you can teleport straight to the problem)

Typical use: server feels laggy → /lagpeek → "oh, 900 zombies in one chunk at ~1240, -380" → go fix it.

Install

Drop lagpeek-x.y.z.jar into your plugins/ folder.
Restart the server. Done — there is nothing to configure.

Requires Paper 1.21.x (or a fork) and Java 21.

Command & permission

Command	Permission	Default
`/lagpeek`	`lagpeek.use`	OP

Safe by design

LagPeek only reads server state. It has no event listeners, never edits the world, and runs no repeating tasks — so it cannot conflict with any other plugin. The only network/background activity is a one-time update check on startup (against Modrinth's public API, notify-only) and anonymous bStats usage stats.

Building from source

./gradlew :lagpeek:build

Output: lagpeek/build/libs/lagpeek-<version>.jar

Quick facts

Edition: Minecraft Java
File type: .jar
Minecraft versions listed: 26.1, 26.1.1, 26.1.2
How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.

Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.

File checked by MCModsHub

Ships as lagpeek-1.0.0+mc26.jar — drop this file into the mods folder
Download size: 37 KB
Download link checked 27 Oct 2026 — working

These come from our own check of the pack file, not from the source page.

Explore more

All Mods for Java All Minecraft Java mods Java mods for 26