🧟 Project Zomboid

Game Server Readiness Checker

Check public address, port, protocol, query visibility, version, password state, and firewall rules before launch.

Server Settings Generator (Build 42)

Presets + a form in. servertest_SandboxVars.lua and servertest.ini out. Paste a config to compare it against a preset.

Build 42 Map Renderer

Render your own B42 server map - modded and custom maps the official vanilla map can't show.

Workshop Collection → Server Config

Steam Workshop URL in. servertest.ini lines out.

Mod Config Checker (Won't Start?)

Paste your servertest.ini mod lines. Finds why the server won't start - orphan mod, missing dependency, wrong load order, B41-on-B42, map missing from Map= - and returns the corrected, startable config.

Server Log Analyzer

Paste console.txt, get plain-language diagnoses.

Save Inspector (which map mods your world needs)

Point at a world folder and see which map mods it has already used. Remove one after your survivors explored its cells and that ground stops loading. Names and sizes only, read in your browser.

World Recovery (won't load / lost world)

A save that won't load is usually one broken cell file, not a dead world. Point at your save folder: it finds truncated cell files you can safely delete (the game regenerates just that area), checks which backup zips actually contain a full save, and names the newest complete one. Browser-only.

Missing mod

The server is trying to load a Mod ID that is not available on disk. Usually the WorkshopItems line, Mods line, or Steam Workshop download is out of sync.

Workshop download failed

Steam could not fetch one or more Workshop items before the server started. The item may be private, deleted, blocked, or cached in a corrupt local folder.

Map load failure

The server could not load a map folder listed in Map=. Custom maps need their Workshop item installed, their Mod ID enabled, and their map folder placed before Muldraugh, KY.

Port already in use

The game server tried to bind a UDP/TCP port that another process is already using. Only one process can listen on the same IP and port.

Out of memory

The JVM ran out of heap while loading mods, maps, saves, or player data. Heavy modpacks often need more memory than the default startup script provides.

B42 Essentials Modpack (Steam Workshop Collection)

Based on the popular 'B42 Essential Mods' Steam Workshop collection. Use the Workshop Importer to convert it into ready-to-paste config lines.

warning · verified 2026-05-25

Co-op Relaxed (Build 42)

Lower-difficulty defaults for casual co-op groups. No mods. No loot respawn, smaller player cap.

warning · verified 2026-05-25

Hardcore Louisville (Build 42)

High-difficulty settings for a brutal Build 42 server. Low loot respawn, fast infection, no PvE safety, short days.

warning · verified 2026-05-26

Long-Haul Persistent (Build 42)

World keeps ticking 24/7. For asynchronous groups where players log in at different times and want a living world.

warning · verified 2026-05-26

Low-Pop Co-op (Build 42)

Tuned for 2-4 player friend groups. Lower resource usage, generous loot, no respawn churn.

warning · verified 2026-05-26

Roleplay Friendly (Build 42)

Settings tuned for RP groups. Names visible, server runs while empty, generous loot, no PvP by default.

warning · verified 2026-05-26

Vanilla (Build 41)

Stock Build 41 servertest.ini for groups still on the previous PZ version. Friendly co-op defaults.

working · verified 2026-05-26

Vanilla Plus (Build 42)

Stock servertest.ini with comfortable co-op defaults for a 4-8 player vanilla server. No mods required.

warning · verified 2026-05-25

#1 Build 42 Vanilla Plus

A low-risk Project Zomboid starting stack for small co-op servers: vanilla-first settings, no forced PvP, and only essential Workshop additions after import.

#2 B42 Essentials Import Path

A safer way to use the popular B42 essentials collection: treat the collection as source material, then run it through the importer before deploying.