Welsh Piper
Sandbox Construction Kit
Procedural generators for old-school fantasy roleplaying. Built for BX and OSE rulesets.
Version 1.3.2
Tools 2 active · 3 beta · 0 in-progress
System BX / OSE / OSR
Version History
v1.3.2 2026-05-01 Minor ▼
  • Tools: Settlement Generator
  • Tables (core): BX Settlement Features
  • Other: Consolidated random name generators into dedicated themes files; minor updates to B/X and WoT monster databases
v1.2.1 2026-04-18 Minor ▼
  • Tools: Monster Database
  • Tables (core): BX Monsters, B/X NPC classes (update)
  • Tables (custom): OSE AF Monsters (OGC only), WoT Monsters
  • Other: Consolidated magic item generation functions across magic items, treasure types, and NPC tools
v1.1.0 2026-04-10 Minor ▼
  • Tools: NPC Generator
  • Tables (core): B/X NPC classes, B/X NPC gear
v1.0.0 2026-03-30 Major ▼
  • Site: New UI for integrated toolset
  • Tools: Treasure Types, Magic Items
  • Tables (core): B/X magic items, B/X treasure types, B/X spells
  • Tables (custom): OSE AF magic items, OSE AF spells, BX Options: Alternate Magicks spells
Check our Roadmap to see what's being built next.
Support & Contact
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Support on Patreon
Back the SCK on Patreon — access custom table packs and exclusive perks.
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Email Support
Questions, bug reports, and feature requests — [email protected]
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Credits
Patreon members whose support makes the SCK possible.
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Open Game License
Legal notices and OGL 1.0a attribution for content used in the Sandbox Construction Kit.
🔒 This application runs entirely in your browser. All data — session history, settings, and custom tables — is stored in your browser's localStorage and never leaves your device. Nothing is transmitted to any server.