Mojang Dev Tools
Unlocks all hidden developer features normally only available inside Mojang's IDE — with an in-game config menu to toggle each flag individually. ALL TOOLS EXIST IN OFFICIALLY RELEASED MOJANG BINARIES, THIS MOD SIMPLY ENABLES THE FLAGS
Sets SharedConstants.IS_RUNNING_IN_IDE = true and MC_DEBUG_HOTKEYS=true at class-load time, enabling debug overlays, internal commands, and dev-mode keybinds that are shipped in the game but never exposed in production.
Requirements
- Minecraft 26.1.2
- Fabric Loader 0.19.2 or later
Key Features
Debug Keybinds (F3 held)
| Hotkey |
Action |
| F3 + Z |
Custom debug renderer menu |
| F3 + F6 |
Mojang internal debug options menu |
| F3 + E |
Chunk section path debug overlay |
| F3 + F |
Toggle fog rendering |
| F3 + L |
Toggle smart culling |
| F3 + O |
Frustum culling octree overlay |
| F3 + U |
Freeze/capture frustum at current position |
| F3 + V |
Chunk section visibility overlay |
| F3 + W |
Wireframe rendering mode |
Note: F3+F with this mod enabled toggles fog instead of cycling render distance — this is the dev-mode override.
Renderer Overlays
Toggle any of these in-game via F3 + F6:
- Pathfinding route overlay
- Block neighbor update overlay
- Structure bounding box overlay
- Mob brain & memory overlay
- AI goal selector overlay
- Point of interest (POI) overlay
- Bee hive/path overlay
- Raid state overlay
- Village section overlay
- Entity hitbox overlay (integrated server)
- Block collision shape overlay
- Sculk catalyst spread overlay
- Breeze mob debug overlay
- Experimental redstone wire update order overlay
World Generation Debug
- Cave carver volume overlay
- Ore vein bounds and type overlay
- Aquifer cell boundary overlay
- Per-chunk feature placement count heatmap
- Large dripstone cluster overlay
- Disable individual world gen passes (fluids, aquifers, surface, carvers, structures, features, ore veins, blending, retrogeneration)
Gameplay & QOL Flags
- All villager trade tiers unlocked immediately
- Ignore mob cap on integrated server
- Open worlds from incompatible versions
- Allow simulation distance below the normal minimum
- Keep jigsaw blocks after structure generation
- Structure edit mode
- Save structures as SNBT text files
- Per-tick timing monitor
- Show all sound subtitles
- Suppress outbound Mojang telemetry
- Cursor position in F3 overlay
- Suppress all world saves (world reverts on exit)
Internal Server Commands
Unlocked when IS_RUNNING_IN_IDE is active:
/raid — Force-start/stop raids, set omen level, spawn raid captains, toggle raider glow/debugpath to <x> <y> <z> — Visualize pathfinding routes in-world/debugmobspawning at <x> <y> <z> — Diagnose mob spawning per category/warden_spawn_tracker — Read/write warden warning levels for nearby players/spawn_armor_trims — Spawn all armor trim combinations on armor stands/serverpack push/pop — Push/pop server resource packs to clients without restarting/chase — Sync camera between two game instances (Mojang QA tool)
