Inspired by Eric Vulgaris' Sandboxes From Scratch video.
In the video, Eric uses an excel spreadsheet of described locations, and then follows an algorithm to generate a small portion of a fantasy world, using those locations.
This app does all that work for you, allowing you to get on with creating your setting.
This app is designed to be used with Hexographer, or any of map making tool!
If you're unsure how to proceed, I'd reccomend watching the video above to get an idea of how Eric creates his Sandbox.
You can see a demo of the web app here!