Free hex map maker for tabletop RPGs

Hex Map Builder is a free, browser-based hex map editor for The Fantasy Trip megahex labyrinths, GURPS tactical combat maps, BattleTech hex boards, Traveller encounters, and other hex-grid games. Paint terrain and features, place numbered room keys with notes, rotate tiles, undo changes, and export PNG, PDF, or JSON — no account and no install.

Pointy-top hex grid with terrain, props, stairs, doors, water, and more
Room key overlays and printable notes for module writing
Colour or black-and-white print style
Save and reload maps as JSON; works great for TFT homebrew modules