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Guides / Terraria / tModLoader mods

tModLoader mod config files in the Config Editor

Edit a tModLoader mod's own settings in the Config Editor. Each config file under ModConfigs shows as Mod: Config. Restart the server to load a change.

Updated , checked on Terraria tModLoader v2026.09.3.1

Many tModLoader mods have their own settings. The panel lists each mod’s config as a file in the Config Editor, named like Mod name: Config name. Open one, change a value, save, and restart the server. A restart disconnects everyone who is on, so use Message everyone first.

This works on a server that runs tModLoader. See the Terraria server page for the three server programs.

Find the files

  1. Open the Config Editor for the server.
  2. Look at the file list at the top. It holds Passwords and Server settings (1), then one entry per mod config.
  3. Choose the one you want.
The Config Editor with its file list across the top: Passwords, Server settings, TShock and TShock server-side characters
  1. Server settings

The picture is from a TShock server, so it lists the TShock files. On tModLoader the mod configs take their place after Server settings.

Each entry is a .json file in tModLoader/ModConfigs, inside the tModLoader save folder. The panel shows the file name with its first underscore written as a colon and a space. So a file named ExampleMod_ExampleConfig.json shows as ExampleMod: ExampleConfig.

The list is sorted by name, small files only, and stops at 60 files.

Edit a config

  1. Open the file in the Config Editor.
  2. Change the values you want. What each value does is up to the mod, so read the mod’s own page on the Steam Workshop.
  3. Save.
  4. Restart the server.

By hand

Open Files, go to tModLoader/ModConfigs (on a server you run yourself, ModConfigs in the tModLoader save folder), and edit the .json file there. Keep it valid JSON. The same rule applies: restart the server after.

If it does not work

  • A mod has no config file in the list. The list shows only files that are in tModLoader/ModConfigs. A mod with no file there has none to edit yet. Apply the mod on the Mods page, start the server, and look again.
  • The list stops short. The panel shows 60 files at most, and skips big files. Use Files for the rest.
  • A setting seems to do nothing. Some mod settings only matter in the player’s own game, not on the server. Check the mod’s Workshop page for which side uses it.
  • You broke the file. Put the old values back. Keep a copy of a config before you change it.

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