Top 5 ways to find spawners in Minecraft survival
End portals are the only gateway to the end dimension. These portals can be found in Strongholds. Strongholds are structures in the overworld that have various rooms, one of which is the portal room, where a spawner can be found.
Bastions are large castle-like structures found in all biomes of the Nether world except the basalt delta. These structures have treasure rooms with blocks of gold and a magma spawner in the center of its bottom.
Nether fortresses can be found in the nether realm in all biomes. The Blaze is an exclusive mob that spawns in nether fortresses through blaze spawners. These spawners are often used to create blaze farms that yield blaze rods.
These are structures that generate naturally at any height in the overworld. Dungeons are small rooms that are made of cobblestone and mossy cobblestone. These rooms have a spawner with 1-2 chests. The spawner can either be a zombie, skeleton, or spider spawner.
Mineshafts are tunnel-like structures with mazes that are found underground or underwater. These tunnels have exposed mineral ores, chests, and cave spider spawners.