No. In ordinary vanilla Minecraft, blazes do not spawn on Peaceful difficulty—not naturally and not from a blaze spawner. To spawn blazes through normal gameplay, change the world to a non-Peaceful difficulty.
Why a blaze spawner is inactive on Peaceful
A blaze spawner does not bypass the difficulty rule: monster spawners cannot spawn mobs while the game is set to Peaceful, according to the Peaceful difficulty guide. A Nether fortress spawner that appears silent on Peaceful is therefore behaving as expected, rather than necessarily being broken.
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The Microsoft Learn Bedrock Edition spawn-rules documentation likewise states that hostile mobs do not spawn on Peaceful.
What to check if you want blazes
- Change the world difficulty from Peaceful to any non-Peaceful setting.
- Return to the blaze spawner or fortress and allow the usual spawning conditions to apply. The difficulty change removes the Peaceful restriction; it does not guarantee a spawn if other conditions are unmet.
Blazes are associated with Nether fortresses, and fortress or spawner conditions matter once the difficulty restriction is gone. They do not override Peaceful mode; see the blaze spawning reference.
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Does this differ between Java and Bedrock?
The ordinary vanilla answer is no blazes on Peaceful. The Microsoft documentation cited here specifically covers Bedrock Edition, while the general Peaceful guide describes the spawner restriction. These references do not establish a controlled Java-versus-Bedrock comparison or verify every historical release separately, so this is not a version-by-version claim.
Mods, commands, custom data packs, or server plugins can change normal behavior; what they do depends on the specific setup.
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