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Zod v3 to v4 migration guide? #13166

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kpyszkowski asked this question in Q&A

kpyszkowski
Nov 28, 2025

How to migrate from Zod v3 to v4:

How to provide required error messages?
How to provide invalid type error messages?
Are default values really mandatory - even for .optional() fields?
How to handle numbers?

Replies: 1 comment

BrendanC23
Dec 1, 2025

Is there a specific schema you need help with? Most of this should be the same with either Zod 3 or Zod 4.

0 replies

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