For all the people who read this and DO NOT create a new issue without checking the existing ones:

THANK YOU!!!

Link: https://github.com/Cubitect/cubiomes-viewer

Quick overview:

• Supports 1.20 (fast updates, also supports old versions)
• Shows biomes and structures
• Supports nether and end
• Seed search usung biomes and structure filters (all biome seed, quad witch hut, ...)
• Completly standalone, no need for Minecraft or Java

@toolbox4minecraft please set the repo to archived and add a notice to the readme, then many lazy people at least will get it.