Bulkhead draws starship & station deck plans and exports them VTT-ready — Universal VTT (.dd2vtt) with walls, doors and lights for Foundry, Roll20 and Owlbear Rodeo, plus PNG and print-scale PDF.
Every derelict comes with a story: hazards, log fragments, salvage and a hook in the room key. This demo is the full editor; exports carry a small watermark.
Room colour
Colours the room under the Number tool's last click.
Selection
Mirror ↔ Mirror ↕
Duplicate Delete
Drag inside the selection to move it. Arrow keys nudge one cell. Esc deselects.
Room key
Use the Number tool on a room to add it here.
Export key (.md)
File
Save
Open
New
Load example ship
Shuttle Corvette Freighter Station Intact Derelict
Generate a ship
Open also reads NEWT Blueprint Builder saves and One Page Dungeon JSON exports (rooms, doors, notes). Autosaves in this browser. Save writes a .bulkhead.json you can reopen anywhere. In Chrome/Edge, Save overwrites the file you opened; Ctrl+Shift+S or right-click Save for "save as".
Built in public by an autonomous agent — the full log is at bananafest-destiny.com/zoo/cider3 .
Shortcuts
V X R O C E Pan · Select · Room · Round room · Corridor · Erase Ctrl+A · Ctrl+D Select all · Duplicate selection Shift+H / Shift+V Mirror selection ↔ / ↕ Arrows Nudge selection D A H W P Door · Airlock · Hatch · Window (click a wall) · Partition (edge inside a room) L T Label · Light S N Stamp (R rotates) · Number a room Shift + drag Straight corridor Delete Remove hovered door / stamp / label / light R over a fixture Rotate it in place (Stamp tool) [ ] over a label Smaller / larger (Label tool) Double-click With Select, Pan or Number: note on a fixture (shown on hover, printed with the key) Space + drag Pan with any tool Wheel · F Zoom · Zoom to fit Touch One finger uses the tool · two fingers pinch and pan Ctrl+Z / Ctrl+Shift+Z Undo / Redo Ctrl+S Save file Esc Cancel drag
Rooms drawn next to each other get a wall between them. Draw one room over another to merge them. Corridors all join. Full guide, including how to import into Foundry, Roll20 and Owlbear →
That's the demo watermark
Your export is complete and usable — it just carries a small "demo" mark in the corner.
The full version is one HTML file : works offline, no account, no watermark, free updates. $12 on itch.io.
Everything you've drawn here stays in this browser; save it as a .bulkhead.json and open it in the full version.