Miria, Rayya, Nala, Garland, and Edryk enter the Fane of the All-Knowing: a labyrinth of traps, illusions, and deadly guardians. Nothing in their path is what they seem. Especially when the traps force the group apart.
I created this dungeon using the AD&D Random Dungeon Generator from Donjon.bin.sh; which creates a complete dungeon based on your specifications and to a theme.
Another powerful tool for solo map generation is the game Four Against Darkness; a lightweight solo dungeon crawler that makes exceptional maps. Read my review of it here.
A faster, and extremely light solo adventure tool that I have also used for solo adventuring is Tale of the Manticore’s very own One Shot in the Dark, that combines solo card game and old-school dungeon crawl. Read my review of it here. Great game, and my favourite podcast!
I also occasionally use a random d20 or d66 encounter table of monsters, traps, and encounters based on a Dungeon theme, connected to a clock system similar to that used in Fabula Ultima or Blades in the Dark. you can see one of my earliest versions of that method in my three-part review of Salamandur Household for Pacts & Blades: part one, part two, part three.