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DayZ uses several types of JSON files, each serving a specific purpose:
| Server Error Log | Actual Problem | Fix |
| :--- | :--- | :--- |
| Unexpected token < in JSON | You accidentally saved an HTML character or BOM header. | Resave as UTF-8 without BOM in Notepad++. |
| End of file expected | Missing closing bracket } or ] at the end. | Count your brackets. Use VS Code folding. |
| Duplicate key | Two identical entry names in the same object. | You likely copy-pasted a flag. Delete the duplicate. |
| F_8172163: Persistence read failed | JSON is corrupted; zero-length file. | Restore from a backup of the storage_1 folder. | dayz json files full
Key fields:
The most "interesting" (and frustrating) part of DayZ JSON files is their intolerance for error. A single missing comma or a stray bracket can "brick" a server, causing it to fail on startup or, worse, spawn absolutely zero items—turning the game into a literal walking simulator. Validation : Pro-admins use tools like to ensure their code is "clean." Central Economy (CE) Types of DayZ JSON Files DayZ uses several
If you’ve ever run a DayZ server — or even just tweaked your local game files — you’ve likely run into JSON files. They control everything from types and spawns to economy and expansion mods. Understanding them is the key to customizing your server without breaking it. Pros: Granular control
While DayZ historically used .xml for its central loot economy, several critical modern features are managed via JSON files located in the mpmissions/yourmission/ folder:
Linking: Add the path to your cfggameplay.json under the objectSpawnerArr as follows:"objectSpawnerArr": ["custom/my_new_base.json", "custom/extra_trees.json"].
nominal value vs. min value. If the difference is too high, the server works hard to spawn items constantly, causing lag.