A simple Gloomhaven Line of Sight Tool
Simply select a scenario from dropdown and click a hex to see the line of sight information.
There is also an editor which can be used to create any layout which then may be shared as URL. The editor has two modes:
- Line of Sight mode: click hex to see line of sight information.
- Editing mode: add map tiles, drag and rotate them to place.
. There is also a discussion thread for this app at BoardGameGeek.