Dungeons & Dragons 4th Edition

Encounter Forge

Builder & Tactical Runner

Load Libraries
⚔ Monster Files Select data*.js monster files
🪤 Trap & Hazard Files Select data*.js trap files
Party Configuration
XP Budget
Adjust party settings above
Monster Browser & Manual Encounter
📜

Load monster files to browse the library.

⚔ Encounters
0 XP
Drag monsters here
or click + Add
Trap & Hazard Browser
🪤

Load trap/hazard files to browse the library.

🪤 Adding Traps
Click + Add on any trap or hazard to include it in the currently active encounter above.

Traps share the XP budget with monsters and will appear in both the encounter panel and the PDF export.
Colour Theme
Standing Party
Define your regular PCs here. They'll be pre-loaded into the initiative grid every encounter — you can still add extras or remove them per-session.
Name Init Mod
Party data is also saved automatically in your browser — no need to load a file each visit unless switching computers.